Готові списки джерел за темами / Arc basalt

Добірка наукової літератури з теми "Arc basalt"

Автор: Grafiati
Опубліковано: 10 грудня 2022
Оновлено: 28 січня 2023

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Статті в журналах з теми "Arc basalt"

1

Morishita, Tomoaki, Naoto Hirano, Hirochika Sumino, Hiroshi Sato, Tomoyuki Shibata, Masako Yoshikawa, Shoji Arai, Rie Nauchi, and Akihiro Tamura. "Alkali basalt from the Seifu Seamount in the Sea of Japan: post-spreading magmatism in a back-arc setting." Solid Earth 11, no. 1 (January 7, 2020): 23–36. http://dx.doi.org/10.5194/se-11-23-2020.

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Анотація:
Abstract. We present geochemical and 40Ar∕39Ar age data for a peridotite xenolith-bearing basalt dredged from the Seifu Seamount (SSM basalt) in the northeast Tsushima Basin, southwest Sea of Japan. An 40Ar∕39Ar plateau age of 8.33±0.15 Ma (2σ) was obtained for the SSM basalt, indicating that it erupted shortly after the termination of back-arc spreading in the Sea of Japan. The SSM basalt is a high-K to shoshonitic alkali basalt that is characterized by light rare earth element enrichment. The trace element features of the basalt are similar to those of ocean island basalt, although the Yb content is much higher, indicating formation by the low-degree partial melting of spinel peridotite. The Nd, Sr, and Pb isotopic compositions of the SSM basalt differ from those of back-arc basin basalts in the Sea of Japan. The Sr–Nd isotopic composition of the SSM basalt suggests its source was depleted mid-ocean ridge mantle containing an enriched mantle (EM1) component. The SSM basalt was formed in a post-back-arc extension setting by the low-degree partial melting of an upwelling asthenosphere that had previously been associated with the main phase of back-arc magmatism.
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2

Taylor, Brian, and Fernando Martinez. "Back-arc basin basalt systematics." Earth and Planetary Science Letters 210, no. 3-4 (May 2003): 481–97. http://dx.doi.org/10.1016/s0012-821x(03)00167-5.

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3

Babaie, Hassan A., Abbed Babaei, A. Mohamad Ghazi, and Mohsen Arvin. "Geochemical, 40Ar/39Ar age, and isotopic data for crustal rocks of the Neyriz ophiolite, Iran." Canadian Journal of Earth Sciences 43, no. 1 (January 1, 2006): 57–70. http://dx.doi.org/10.1139/e05-111.

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Анотація:
Trace-element data (including the rare-earth elements) in the crustal sequence of the Neotethyan Neyriz ophiolite in southwest Iran indicate normal mid-ocean ridge basalt (N-MORB) or island-arc tholeiite chemistry for the Tang-e Hana basalt. The data suggest that the Tang-e Hana rhyodacite, basalt, plagiogranite, and gabbro derived from a low-K tholeiitic parent magma. Trace-element distributions in amphibolite clasts, in the sole detachment of the ophiolite south of Lake Neyriz, correlate well with distributions in basalt clasts in the mélange and in the Tang-e Hana basalt. These trace elements suggest that the amphibolite originated from metamorphism and deformation of a tholeiitic basalt protolith. New 40Ar/39Ar incremental heating plateau ages from two hornblende plagiogranite specimens, in the crustal sequence in Tang-e Hana, are 92.07 ± 1.69 and 93.19 ± 2.48 Ma. Isotopic data for five Tang-e Hana basalts yield εNd values of +7.8 and +7.9, and 87Sr/86Sr values of 0.70368 to 0.70476. The isotopic compositions, ophiolite tectonostratigraphy, and correlation of the 40Ar/39Ar cooling (plagiogranite) and deformation (amphibolite) ages suggest emplacement of the Neyriz ophiolite either into an accretionary prism, through offscraping and subduction erosion, and (or) formation in a supra-subduction zone environment, around 82–96 Ma. Progressive accretion probably led to the development of a fore-arc basin and deposition of Upper Cretaceous – Eocene fore-arc and arc-derived sediments on the ophiolite.
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4

Brophy, James G. "Can high-alumina arc basalt be derived from low-alumina arc basalt? Evidence from Kanaga Island, Aleutian Arc, Alaska." Geology 17, no. 4 (1989): 333. http://dx.doi.org/10.1130/0091-7613(1989)017<0333:chaabb>2.3.co;2.

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5

Kara, Jaakko, Markku Väisänen, and Hugh O'Brien. "Zircon dating of the basalt and felsic dyke in Haveri, SW Finland." Bulletin of the Geological Society of Finland 94, no. 2 (December 27, 2022): 109–18. http://dx.doi.org/10.17741/bgsf/94.2.001.

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The E-MORB type Haveri basalt differs from the volcanic arc type rocks in the Tampere belt showing no subduction signature. It is considered to have formed in a marginal basin prior to the volcanic arc. We present here zircon U-Pb dating on two samples. The basalt and the felsic dyke yielded 207Pb/206Pb ages of 1902 ± 5 Ma and 1891 ± 2 Ma, respectively, interpreted as crystallisation ages. The basalt also contains older 1.98 Ga grains while the felsic dyke contains older 1.92 Ga, 1.94 Ga, 1.98 Ga and 2.0 Ga grains, which are inferred as inherited. The age dating of E-MORB type basalts can be used to identify the extensional episodes of the accretionary Svecofennian orogeny.
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6

Jati Widiatama, Angga, Happy Christin Natalia, Rinaldi Ikhram, Lauti Dwita Santy, Joko Wahyudiono, Lanang Rangga Setia Wiguna, and Syifa Faranabila. "Various sources of rare earth element enrichment at Manamas volcanic rock, Timor Island." IOP Conference Series: Earth and Environmental Science 882, no. 1 (November 1, 2021): 012044. http://dx.doi.org/10.1088/1755-1315/882/1/012044.

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Abstract Manamas volcanic rock formed due to crustal thinning in fore arc setting. This research aims to provide information and the enrichment process of rare earth elements in Manamas Formation on the Timor Island and their tectonic implication. Manamas volcanic rock exposed in Bihati River, Baun, Timor consists of two different types of basalts, namely alkaline basalt and sub alkaline basalt. Analysis using ICP-MS method shows enrichment in large ion lithophile element and high field strength element. Subalkaline basalt has N-MORB patterns and alkaline basalt have OIB patterns. The Nb element is relatively impoverished that indicates influence of subduction activities. Thorium and uranium elements also show significant enrichment, due to sedimentary rocks contamination or continental crust or directly from the asthenosphere due to magma upwelling. The two distinctive patterns interpreted due to slab tear phenomenon beneath Timor Island during Australia oceanic plate subduction and recycled oceanic crust beneath Banda Arc.
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7

Taylor, Brian, and Fernando Martinez. "Corrigendum to “Back-arc basin basalt systematics”." Earth and Planetary Science Letters 214, no. 3-4 (September 2003): 679. http://dx.doi.org/10.1016/s0012-821x(03)00421-7.

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8

Simard, Renée-Luce, Jaroslav Dostal, and Maurice Colpron. "Rifting of a Mississippian continental arc system: Little Salmon formation, Yukon–Tanana terrane, northern Canadian Cordillera." Canadian Journal of Earth Sciences 44, no. 9 (September 1, 2007): 1267–89. http://dx.doi.org/10.1139/e07-022.

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Анотація:
The Yukon–Tanana terrane in the northern Canadian Cordillera records the development of a series of mid- to late Paleozoic arc systems, punctuated by intra-arc deformation, uplift, and episodic rifting coeval with back-arc extension, built upon a metasedimentary basement of northwestern Laurentian affinity. In central Yukon, the Little Kalzas formation records the development of one of these Mississippian continental arcs, whereas the Little Salmon formation records the development of an intra-arc rift basin within a continental arc. The Little Salmon formation lower succession comprises mainly volcaniclastic rocks derived from erosion of Early Mississippian and older units, including rocks of the Little Kalzas continental arc. Above a medial limestone member, the upper succession of the Little Salmon formation includes alkali basalt, breccia, and crystal and ash tuffs in the north and predominantly epiclastic rocks interbedded with crystal and ash tuffs in the south. The alkali basalts have the geochemical characteristics of ocean-island basalts and their positive ε Nd 340 (+7.3) and low 87Sr/86Sr values (0.705) suggest a primitive magma source with little or no involvement of continental crust. The transition between the northern and southern facies of the upper succession of the Little Salmon formation coincides with a northeast-trending synvolcanic fault inferred to have controlled alkali basalt eruptions and deposition of Mn-bearing exhalite in the north and basin plain sedimentation in the south. The environment of deposition of the Little Salmon formation resembles that of the modern Sumisu rift in the Izu–Bonin–Mariana arc system or the early stages of development of the Japan island-arc system.
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9

Haidar, Tanveer, Sagar Misra, Neeraj Vishwakarma, and K. R. Hari. "Geochemical evolution of basaltic flows from Dongargarh Supergroup, Bastar Craton, Central India." IOP Conference Series: Earth and Environmental Science 1032, no. 1 (June 1, 2022): 012001. http://dx.doi.org/10.1088/1755-1315/1032/1/012001.

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Abstract Composition of basalts in magmatic arcs influenced by the subducting lithosphere, mantle wedge, dehydration of oceanic crust, and/or crustal assimilation beneath the arc. In this paper, we compiled earlier published geochemical data of Dongargarh basalts to decipher the genesis of volcanic rocks. SiO2 vs (FeO + MgO) plot of basalt suggests the volcanic rocks are tholeiitic in composition. Primitive mantle and REE normalized plots indicate either the source was enriched mantle or a possible interaction of depleted magmatic source with the Paleoarchean continental crust in the Bastar Craton. The primitive mantle normalized diagram shows a negative anomaly of Nb, Ti, and Ta indicates subduction-related magmatism. In addition to the basalt composition, variation diagrams for tectonic settings represent the continental arc-related magmatism. From the available geochemical data of basalts and earlier studies on Dongargarh volcanic, there was an oceanic ridge that was subducted beneath the continental plate. The source of Pitepani basalts was significantly enriched in HFSE and REE as compared to mid-oceanic basalts. Thus the study finds the volcanic rocks are part of enriched mantle source that formed in the subduction-related magmatism.
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10

Lodge, Robert W. D., Harold L. Gibson, Greg M. Stott, James M. Franklin, and George J. Hudak. "Geodynamic setting, crustal architecture, and VMS metallogeny of ca. 2720 Ma greenstone belt assemblages of the northern Wawa subprovince, Superior Province." Canadian Journal of Earth Sciences 52, no. 3 (March 2015): 196–214. http://dx.doi.org/10.1139/cjes-2014-0163.

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Анотація:
The greenstone belts along the northern margin of the Wawa subprovince of the Superior Province (Vermilion, Shebandowan, Winston Lake, Manitouwadge) formed at ca. 2720 Ma and have been interpreted to be representative of a rifted-arc to back-arc tectonic setting. Despite a common inferred tectonic setting and broad similarities, these greenstone belts have a significantly different metallogeny as evidenced by different endowments in volcanogenic massive sulphide (VMS), magmatic sulphide, and orogenic gold deposits. In this paper, we examine differences in geodynamic setting and crustal architecture as they pertain to the metallogeny of each greenstone belt by characterizing the regional-scale trace-element and isotopic (Nd and Pb) geochemistry of each belt. The trace-element geochemistry of the Vermilion greenstone belt (VGB) shows evidence for a transition from arc-like to back-arc mafic rocks in the Soudan belt to plume-driven rifted arcs in the ultramafic-bearing Newton belt. The Shebandowan greenstone belt (SGB) has a significant proportion of calc-alkalic, arc-like basalts, intermediate lithofacies, and high-Mg andesites, which are characteristic of low-angle, “hot” subduction. Extensional settings within the SGB are plume-driven and associated with komatiitic ultramafic and mid-ocean ridge basalt (MORB)-like basalts. The Winston Lake greenstone belt (WGB) is characterized by a transition from calc-alkalic, arc-like basalts to back-arc basalts upward in the strata and is capped by alkalic ocean-island basalt (OIB)-like basalts. This association is consistent with plume-driven rifting of a mature arc setting. Each of the VGB, SGB, and WGB show some isotopic evidence for the interaction with a juvenile or slightly older differentiated crust. The Manitouwadge greenstone belt (MGB) is characterized by isotopically juvenile, bimodal, tholeiitic to transitional volcanic lithofacies in a back-arc setting. The MGB is the most isotopically juvenile belt and is also the most productive in terms of VMS mineralization. The Zn-rich VMS mineralization within the WGB suggests a relatively lower-temperature hydrothermal system, possibly within a relatively shallow-water environment. The Zn-dominated and locally Au-enriched VMS mineralization, as well as mafic lithofacies and alteration assemblages, are characteristic of relatively shallower-water deposition in the VGB and SGB, and indicate that the ideal VMS-forming tectonic condition may have been compromised by a shallower-water depositional setting. However, the thickened arc crust and compressional tectonics of the SGB suprasubduction zone during hot subduction may have provided a crustal setting more favourable for the magmatic Ni–Cu sulphide and relative gold endowment of this belt.
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Більше джерел

Дисертації з теми "Arc basalt"

1

Haugen, Emily A. "Magmatic Evolution of Early Subduction Zones: Geochemical Modeling and Chemical Stratigraphy of Boninite and Fore Arc Basalt from the Bonin Fore Arc." DigitalCommons@USU, 2017. https://digitalcommons.usu.edu/etd/5934.

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Анотація:
The Izu-Bonin-Mariana arc stretches south from Japan to Guam in the Western Pacific. International Ocean Discovery Project Expedition 352 drilled four core in the fore arc of the Izu-Bonin arc east of the Bonin Islands: U1439C, U1440B, U1441A, and U1442A. From the four core, 124 samples were retrieved and analyzed for major and trace elements. Two main rock types were identified: FAB and boninite. FAB is a Mid-Ocean Ridge Basalt (MORB)-like tholeiite with variable fluid mobile element enrichment such as Rb, Ba, and Sr, and low Ti/V ratios more similar to an island arc volcanic than a mid-ocean ridge volcanic. Boninite is a hydrous high-Mg andesite with low TiO2 and distinctive subduction zone characteristics in the form of elevated fluid mobile elements and melt mobile elements. FAB was assumed to be formed from a Depleted MORB-Mantle (DMM) source and the boninite was formed from a depleted mantle source, presumably the mantle after FAB melt was extracted. Here, we used the Rare Earth Elements (REE) of the samples to model melt scenarios for the FAB and boninite in order to better understand the initial volcanic product of subduction zones. This research was funded by in joint by the National Science Foundation, Consortium for Ocean Leadership, and International Ocean Discovery Program. 124 samples were analyzed using an X-Ray Fluorescence (XRF) and Inductively Coupled Plasma - Mass Spectrometer (ICP-MS) to determine the major and trace elements. These analyses were then used to recreate the chemostratigraphy defined by the shipboard crew and determine variations within the core. We found that there was variability as the magma evolved over time and mixed with other melts, seen in magma mixing horizons. Boninite samples were separated based on their SiO2 and MgO concentrations into Basaltic Boninite (BB), Low-Silica Boninite (LSB), and High-Silica Boninite (HSB) with BB being more primitive and HSB being more evolved. These volcanics are the first known products of the subduction zone and were used to model the early evolution of the subduction zone. FAB was the first product due to its proximity to the trench and greater age than the boninite. Assumed to be generated from DMM, FAB was modeled with a total melt extraction of ~20% spinel lherzolite and 1% garnet lherzolite. Boninite was assumed to be generated from the FAB residue because it requires a depleted source and because the FAB residue was within the hydrous flux melt zone of the subduction factory. Boninite was modeled at high degree of melt from the FAB residue, however an additional melt must be added to the model to match the observed samples. We proposed a small fraction of FAB melt mixed with the models because it is still present in the subduction factory, observed in core U1439C with a FAB sample in the HSB regime.
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2

Holbik, Sven P. "Arc Crust-Magma Interaction in the Andean Southern Volcanic Zone from Thermobarometry, Mineral Composition, Radiogenic Isotope and Rare Earth Element Systematics of the Azufre-Planchon-Peteroa Volcanic Complex, Chile." FIU Digital Commons, 2014. http://digitalcommons.fiu.edu/etd/1524.

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Анотація:
The Andean Southern Volcanic Zone (SVZ) is a vast and complex continental arc that has been studied extensively to provide an understanding of arc-magma genesis, the origin and chemical evolution of the continental crust, and geochemical compositions of volcanic products. The present study focuses on distinguishing the magma/sub-arc crustal interaction of eruptive products from the Azufre-Planchon-Peteroa (APP 35°15’S) volcanic center and other major centers in the Central SVZ (CSVZ 37°S - 42°S), Transitional SVZ (TSVZ 34.3-37.0°S), and Northern SVZ (NSVZ 33°S - 34°30’S). New Hf and Nd isotopic and trace element data for SVZ centers are consistent with former studies that these magmas experienced variable depths of crystal fractionation, and that crustal assimilation is restricted to the lower crustal depths with an apparent role of garnet. Thermobarometric calculations applied to magma compositions constrain the depth of magma separation from mantle sources in all segments of the SVZ to(70-90 km). Magmatic separation at the APP complex occurs at an average depth of ~50 km which is confined to the mantle lithosphere and the base of the crust suggesting localized thermal abrasion both reservoirs. Thermobarometric calculations indicate that CSVZ primary magmas arise from a similar average depth of (~54 km) which confines magma separation to the asthenospheric mantle. The northwards along-arc Sr-Nd-Hf isotopic data and LREE enrichment accompanied with HREE depletion of SVZ mafic magmas correlates well with northward increasing crustal thickness and decreasing primary melt separation from mantle source regions indicating an increased involvement of lower crustal components in SVZ magma petrogenesis. The study concludes that the development of mature subduction zones over millions of years of continuous magmatism requires that mafic arc derived melts stagnate at lower crustal levels due to density similarities and emplace at lower crustal depths. Basaltic underplating creates localized hot zone environments below major magmatic centers. These regions of high temperature/partial melting, and equilibration with underplated mafic rocks provides the mechanism that controls trace element and isotopic variability of primary magmas of the TSVZ and NSVZ from their baseline CSVZ-like precursors.
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3

Desmet, Alain. "Ophiolites et séries basaltiques crétacées des régions caraïbes et nordandines : bassins marginaux, dorsales ou plateaux océaniques ?" Nancy 1, 1994. http://www.theses.fr/1994NAN10313.

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Анотація:
Les régions caraïbes et nordandines comportent, au crétacé, des séries magmatiques basiques, volcaniques ou ophiolitiques. L'étude petrologique analytique (majeurs, traces, terres rares, microsonde) de quelques séries du Costa Rica, de Colombie et d'Équateur, a permis leur identification magmatique et dynamique. La comparaison des laves à certaines séries volcaniques océaniques actuelles a conduit à une réinterprétation magmatique et géodynamique globale. Au Costa Rica, la péninsule de Santa Elena est formée d'une large nappe ophiolitique tholeiitique avec péridotites, cumulats gabbroiques et dolerites diverses (n-morb). Les iles Murcielago sont couvertes de ferrobasaltes t-morb. Santa Elena représente un témoin de croute océanique crétacée mis en place vers 70 ma et Murcielago un lambeau de plateau océanique soudé à l'Amérique centrale. La Colombie offre, au crétacé, et du nord au sud de la cordillère occidentale, un large éventail de formations océaniques: la série du Boqueron de Toyo, à volcanisme basaltique et intrusions diorito-tonalitiques (92 ma) témoigne du fonctionnement d'un arc insulaire immature. La série d'Altamira, a cumulats gabbroiques et basaltes primitifs illustre l'ouverture vers 80 ma d'un bassin en arrière de l'arc précédent. Le massif de Bolivar, correspond, avec ses cumulats tholeiitiques (i ou iia), a la croute océanique. La coupe de Buenaventura a Buga, avec ses nappes empilées riches en sédiments océaniques et en basaltes de type t-morb évoque des terrains constitués en plateau océanique et accrétés à la marge sud-américaine. En Équateur, le crétacé supérieur de la cordillère occidentale offre une situation analogue: des lambeaux de croute océanique sont dispersés le long d'une grande suture ophiolitique oblitérée par l'arc volcanique de Macuchi. La série de la Quebrada San Juan est l'équivalent de celle de Bolivar. Les basaltes (t-morb) du Grupo Pinon de la cote correspondent aussi à du matériel de plateau océanique accrété au bâti sud-américain
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4

Saal, Alberto Edgardo. "Petrology and geochemistry of intra-back arc basalts from the Argentine Andes." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/57753.

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Анотація:
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.
Includes bibliographical references (leaves 50-63).
by Alberto Edgardo Saal.
M.S.
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5

O'Leary, Julie Ann Asimow Paul David. "Hydrogen isotope geochemistry of the mantle : constraints from back arc basin basalts and mantle xenoliths /." Diss., Pasadena, Calif. : California Institute of Technology, 2007. http://resolver.caltech.edu/CaltechETD:etd-12182006-072449.

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6

Bouvier, Anne-Sophie. "Etude des magmas primaires de l'arc des Petites Antilles par l'analyse in situ des inclusions vitreuses." Thesis, Nancy 1, 2008. http://www.theses.fr/2008NAN10071/document.

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Анотація:
Les laves de l’arc des Petites Antilles présentent une large gamme de compositions le long de l'arc et au sein d'un même centre volcanique. De précédentes études ont montré une variation de l'influence des fluides issus de la plaque océanique subductée le long de l’arc et au sein d’une même île. Cependant, la nature des fluides et l'importance de leurs contributions sont encore débattues. Afin d'apporter de nouvelles contraintes sur les conditions de genèse des magmas ainsi que sur l'influence et la nature des fluides issus du slab, des scories magnésiennes provenant de St. Vincent et Grenade, situées au sud de l’arc, ont été utilisés. Les compositions en éléments légers, traces et isotopes stables ont été déterminées par sonde ionique dans les inclusions vitreuses piégées dans les olivines, donnant un accès direct aux compositions des magmas primitifs, non affectés par les processus superficiels. La combinaison des différentes mesures a permis de mettre en évidence l’influence de trois sortes de fluides sur les sources mantelliques : 1- un fluide de compositions proche de celle de l’eau de mer, probablement relâché lors de la déshydratation du manteau serpentinisé entraîné en profondeur par le slab, 2- des fluides de déshydratation de la croûte océanique subductée et 3- des fluides issus de la déshydratation des sédiments. Ces fluides aqueux montrent des concentrations différentes en éléments dissous, reflétant la profondeur à laquelle ils sont extraits. L’ensemble des données révèle une genèse des magmas à plus forte profondeur et plus faible taux de fusion (7-15%) à Grenade, ceux de St. Vincent étant extraits à 1190-1220°C et 13-14 kbar avec un taux de fusion de 10-20%
The Lesser Antilles arc lavas display a large range of compositions. Previous studies have suggested a variable influence of fluids derived from the subducted oceanic lithosphere along the arc and within individual islands. The fluid contributions and their nature are still a matter of debate. In order to bring new constraints on magmagenesis conditions and on the influence and nature of fluids from the slab on the mantle source, high magnesia scoriae from St. Vincent and Grenada, in the south of the arc, have been used. Different analyses (light and trace elements, ?D, ??Li, ?11B, ?18O, ?34S) have been performed on olivine-hosted melt inclusions, using ion probe. Their study gives a direct access to the primitive magma compositions as yet unaffected by superficial processes. The association of several measurements permit three types of fluid components to be highlighted: 1- a seawater-like fluid, probably released by serpentinized mantle dehydration when it is pulled down by the slab, 2- fluids deriving from altered oceanic crust dehydration and 3- fluids issued from sediment dehydration. These aqueous fluids have different solute contents, reflecting their extraction depths. This dataset suggest a deeper genesis and lower partial melting rate (7-15%) for Grenada melts, St. Vincent melts being generated at 1190-1220°C, 13-14 kbar, from 10-20% partial melting
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7

Nguyen, Tan. "Load transfer mechanisms and seismic stability of embankments subjected to basal subsidence." Kyoto University, 2018. http://hdl.handle.net/2433/235077.

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8

Silva, Leovandes Soares da. "Din?mica da comunidade arb?rea em fitofisionomias de cerrado e floresta estacional semidecidual em Curvelo ? MG." UFVJM, 2016. http://acervo.ufvjm.edu.br/jspui/handle/1/1341.

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Анотація:
?rea de concentra??o: Recursos florestais.
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Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES)
Este trabalho teve como objetivo avaliar mudan?as flor?sticas e estruturais da comunidade e popula??es arb?reas em fitofisionomias de Cerrado e Floresta Estacional Semidec?dual. A ?rea de estudo se encontra situada na Fazenda Experimental do Moura, em Curvelo-MG (Cerrado stricto sensu ? CSS ? 18,84? S e 44,39? W; Cerrad?o ? CD ? 18?82?S e 44?25? W; e Floresta Estacional Semidecidual ? FES ? 18?45?S e 45? 25?W), o clima ? do tipo Aw de K?ppen e se encontra sobre substrato de Latossolos ?cidos e distr?ficos. Um primeiro invent?rio foi realizado no CSS e CD em 2010, quando foram identificados, medidos todos os indiv?duos vivos com di?metro altura do solo (DAS) ? 5,0 cm, a 0,30 m de altura do solo. J? para a FES, o primeiro invent?rio ocorreu em 2011 e foram medidos di?metros e identificados todos os indiv?duos vivos com di?metro altura do peito (DAP) ? 5,0 cm. O segundo invent?rio de todas as fitofisionomias foi realizado em 2015, foram adotados os mesmos crit?rios do invent?rio anterior, sendo remedidos os sobreviventes, registrados mortos e indiv?duos que atingiram o di?metro m?nimo de inclus?o no segundo invent?rio (recrutas) receberam placas com numera??o e foram identificados e mensurados. Em cada parcela de cada fitofisionomia foram coletados vari?veis ambientais para an?lises de correla??o de Pearson (vegeta??o e ambiente). Foram realizadas an?lises de din?mica flor?stica, estrutural e das popula??es mais abundantes, todas as esp?cies foram classificadas quanto ao status de conserva??o, densidade da madeira e dispers?o de sementes. No CSS, houve perda de uma ?nica esp?cie Zeyheria montana. As fam?lias com mais representantes Fabaceae com 13 esp?cies no primeiro invent?rio e 13 esp?cies no segundo invent?rio respectivamente, seguidos de: Bignoniaceae (6 e 5), Vochysiaceae (5 e 5) e Malpighiaceae (4 e 4), respectivamente. J? no CD, foram contabilizados (36 e 34) fam?lias, (74 e 69) g?neros (100 e 90) e esp?cies para o primeiro e segundo invent?rio nessa sequ?ncia, houve perda de 11 esp?cies e ganho de uma. As fam?lias mais representativas Fabaceae (15 e 14), Rubiaceae (8 e 8), Myrtaceae (7 e 5) e Bignoniaceae (7 e 7). Houve perda de duas fam?lias Siparunaceae e Opiliaceae. No entanto, na FES n?o houve mudan?as na riqueza de fam?lias (43), j? as esp?cies (132 e 129) perderam cinco e ganharam duas esp?cies. As fam?lias com mais esp?cies eram Fabaceae (21 e 20), Myrtaceae (14 e 12), Lauraceae e Meliaceae (9 e 9) e Rubiaceae (8 e 8), respectivamente. As taxas de mortalidade foram superiores as taxas de recrutamento nas tr?s fitofisionomias, no CSS (mortalidade de 2,13% ano-1 e recrutamento de 1,13% ano-1), seguindo essa mesma sequ?ncia para as outras fitofisionomias, no CD (8,84 e 1,18% ano-1) e FES (2,54 e 1,03% ano-1), respectivamente. Entre o primeiro e segundo invent?rio, houve acr?scimo de ?rea basal no somente no CSS. De maneira geral, os padr?es de din?mica foram mais acelerados nas popula??es do CD, onde visualmente os dist?rbios foram maiores, indicando que dependendo dos intervalos entre os dist?rbios, isso pode colocar em risco o estabelecimento de novos indiv?duos e o futuro das esp?cies.
Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Ci?ncia Florestal, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2016.
This work aimed to evaluate the floristic and structural changes at the level of community and tree populations in physiognomies of cerrado and semideciduous seasonal forest. The study area is situated on the Experimental Farm of the Moorish in Curvelo - MG (Cerrado sensu stricto ? CSS ? 18.84? S and 44.39? W; Cerrad?o ? CD ? 18? 82?S and 44? 25?? W; and semideciduous seasonal Forest ? FES - 18? 45' S and 45? 25' W, average elevation of 715 m), the climate and the type K?ppen Aw and about presence of Microaggregates substrate acidic and dystrophic. A first inventory was conducted in the CSS and CD in 2010 where they were identified, measured and estimated time, for all individuals living with (diameter 0.30 m height from the ground) (DAS) ? 5.0cm. To the FES, the first inventory occurred in 2011 and were measured diameters and identified all individuals living with diameter breast height (dbh) ? 5.0 cm. The second inventory of all physiognomies was held in 2015, and the same criteria were adopted in the previous inventory, being remeasured survivors, recorded dead and individuals who have attained the minimum diameter for inclusion in the second inventory (recruits) received plates with numbering and were identified and measured. On each plot of each phytophysiognomy, environmental variables were collected for analysis of correlation (vegetation and environment). Dynamic analyses were performed, structural and floristic most abundant populations, all species were classified as conservation status, wood density and seed dispersal. In CSS, loss of a single species Zeyheria montana. Families with more representatives Fabaceae (13 and 13), Bignoniaceae (6 and 5), Vochysiaceae (5 and 5) and Malpighiaceae (4 and 4).In the cd, accounting for families (36 and 34), genres (74 and 69) and species (100 and 90), there were 11 species loss and gain a. The most representative families fabaceae (14 and 15), rubiaceae (8 and 8), myrtaceae (7 and 5) and bignoniaceae (7 and 7). Loss of two families Siparunaceae and Opiliaceae. While in FES, don't listen to changes in family wealth (43), species (132 and 129) lost five and won two species. Families Fabaceae species (20 and 21), Myrtaceae (14 and 12), Lauraceae and Meliaceae (9 and 9) and Rubiaceae (8 and 8) respectively. Mortality rates were higher than the rates of recruitment in the three physiognomies, in CSS (2.13 and 1.13%. year-1), CD (8.84 and 1.18%. year-1) and FES (2.54 and 1.03% year-1) respectively. Mortality rates were higher than the rates of recruitment in the three physiognomies, in CSS (2.13 and 1.13%. year-1), CD (8.84 and 1.18%. year-1) and FES (2.54 and 1.03% year-1) respectively. Between the first and second inventory, there was an increase of basal area in CSS only. In General, dynamic patterns were more rapid in populations of the CD, where visually the disturbances were greater, indicating that depending on the intervals between the disturbances, it can jeopardize the establishment of new individuals and the future of the species.
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Moretti, Helena Concetta. "From slab to surface : geochemical evolution and modification of Island Arc Basalts : evidence from the eruptions of the Pollara depression, Salina, Italy." Thesis, University of Bristol, 2016. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.702883.

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Fabre, Pascale. "Les Bordures figées des filons basaltiques de l'Escandorgue-Lodevois : minéralogie, expérimentation et approche théorique /." Montpellier : Centre géologique et géophysique de Montpellier, 1988. http://catalogue.bnf.fr/ark:/12148/cb34991718k.

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Книги з теми "Arc basalt"

1

Albeiro, Osorio Agudelo Jair, ed. Costeo basado en actividades-ABC-: Gestión basada en actividades -ABM-. Bogotá: Ecoe Ediciones, 2007.

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Beuys Platanen und Basalte: 7000 Eichen Projekt. Kassel: AQUINarte, 2013.

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Mira, Letizia Arbeteta, Julio Fermoso García, and Antonio Basanta Reyes. Belenes del mundo: Colección Basanta-Martín. Salamanca]: Caja Duero, 2009.

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Campos, José Arturo Burciaga. Jiménez del Teúl: Memoria sobre el arte popular. [Zacatecas, Zacatecas, Mexico]: IDEAZ, Instituto de Desarrollo Artesanal de Zacatecas, 2010.

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Coffland, Robert T. Contemporary Japanese bamboo art. Chicago: Art Media Resources with Tai Gallery, 1999.

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Alex, Silber, and Magnaguagno Guido, eds. Blumen für Anita: Anita Neugebauer und die Galerie Photo Art Basel. Basel: Schwabe, 2007.

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Basel, Öffentliche Kunstsammlung, ed. Kunstmuseum Basel. Geneva: Foundation BNP Paribas Switzerland in cooperation with the Swiss Institute for Art Research, 2004.

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Rodríguez, Mafalda. Fuego blanco: La colección moderna de Kunstmuseum Basel. Edited by Museo Nacional Centro de Arte Reina Sofía. Madrid: Museo Nacional Centro de Arte Reina Sofía, 2015.

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Heerden, Jannie Van. Zulu basketry. Noordhoek, South Africa: Print Matters, 2009.

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Hà, Thị Nự. Giá trị văn hoá trong nghè̂ thủ công đan lát của các tộc người Việt Nam. Hà Nội: Nhà xuá̂t bản Văn hóa dân tộc, 2004.

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Частини книг з теми "Arc basalt"

1

Sato, Hiroaki, and Tatsuhide Tohara. "Geochemical Characteristics of Back-Arc Basin Basalt." In Formation of Active Ocean Margins, 399–410. Dordrecht: Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4720-7_17.

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Saunders, Andrew, and John Tarney. "Back-arc basins." In Oceanic Basalts, 219–63. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3540-9_10.

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Saunders, Andrew, and John Tarney. "Back-arc basins." In Oceanic Basalts, 219–63. Dordrecht: Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3042-4_10.

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Singer, Bradley S., William P. Leeman, Matthew F. Thirlwall, and Nicholas W. Rogers. "Does Fracture Zone Subduction Increase Sediment Flux and Mantle Melting in Subduction Zones? Trace Element Evidence from Aleutian Arc Basalt." In Subduction Top to Bottom, 285–91. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/gm096p0285.

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Zhang, Ming-ju, Zhen-bo Zhang, and Meng Yang. "A Three-Dimensional Axisymmetric Arc Sliding Method for Checking Basal Heave Stability of Circular Foundation Pits." In Springer Series in Geomechanics and Geoengineering, 116–24. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-10-6632-0_9.

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Salmond, Amiria, and Rosanna Raymond. "Show and Tell: Weaving a Basket of Knowledge." In Between Art and Anthropology, 95–102. London: Routledge, 2021. http://dx.doi.org/10.4324/9781003230694-8.

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Ingves, Stefan. "Basel III: Are we done now?" In Basel III: Are We Done Now?, edited by Andreas Dombret and Patrick S. Kenadjian, 3–10. Berlin, Boston: De Gruyter, 2018. http://dx.doi.org/10.1515/9783110621495-001.

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Coen, William. "Finalising Basel III." In Basel III: Are We Done Now?, edited by Andreas Dombret and Patrick S. Kenadjian, 13–22. Berlin, Boston: De Gruyter, 2018. http://dx.doi.org/10.1515/9783110621495-002.

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Dombret, Andreas. "Basel III: A strong foundation for a thriving economy." In Basel III: Are We Done Now?, edited by Andreas Dombret and Patrick S. Kenadjian, 23–31. Berlin, Boston: De Gruyter, 2018. http://dx.doi.org/10.1515/9783110621495-003.

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Gibson, Michael S. "An assessment of the Basel III reforms." In Basel III: Are We Done Now?, edited by Andreas Dombret and Patrick S. Kenadjian, 32–36. Berlin, Boston: De Gruyter, 2018. http://dx.doi.org/10.1515/9783110621495-004.

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Тези доповідей конференцій з теми "Arc basalt"

1

Blatter, Dawnika, Thomas W. Sisson, and William Ben Hankins. "GARNET STABILITY IN ARC MAGMAS – EXPERIMENTAL RESULTS FOR CASCADE ARC BASALT, ANDESITE, AND DACITE." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-337568.

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Coulthard, Daniel A., Mark K. Reagan, Renat Almeev, Julian A. Pearce, Jeffrey Ryan, Tetsuya Sakuyama, J. W. Shervais, and Kenji Shimizu. "FORE-ARC BASALT TO BONINITE MAGMATISM: CHARACTERIZING THE TRANSITION FROM DECOMPRESSION TO FLUID FLUX MELTING AFTER SUBDUCTION INITIATION." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305866.

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Zhang, Jiawei, and Mingyang Liao. "Rear-Arc Tectonic Setting of Neoproterozoic Calc-Alkaline Picrite-Basalt-Basatic Andesite Magmas in Jiangnan Orogen of South China." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.3103.

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Holbik, Sven, Rosemary Hickey-Vargas, Daniel Tormey, and Dean Whitman. "MAGMA SEPARATION DEPTHS AND LITHOSPHERIC STRUCTURE IN THE ANDEAN SOUTHERN VOLCANIC ZONE: IMPLICATIONS FOR BASALT MAGMA EVOLUTION ALONG A CONTINENTAL ARC." In 65th Annual Southeastern GSA Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016se-273391.

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Wall, Kellie T., Anita L. Grunder, and Dominique Weis. "DIVERGENCE OF GEOCHEMICAL TRACERS IN ANDESITIC SUITES FROM AMBIENT BASALT OVER ~3 M.Y. OF ACTIVITY AT THE GOAT ROCKS VOLCANIC COMPLEX, CASCADE ARC, WASHINGTON." In 115th Annual GSA Cordilleran Section Meeting - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019cd-329705.

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Satyana, A. H. "Ciletuh Subduction, West Java - New Findings, New Problems: Regional Implications to Cretaceous-Paleogene Convergence of Sundaland Margin and Its Petroleum Geology." In Indonesian Petroleum Association 44th Annual Convention and Exhibition. Indonesian Petroleum Association, 2021. http://dx.doi.org/10.29118/ipa21-g-29.

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Анотація:
Ciletuh, southwest Java has been well known as one of the places in Java where pre-Tertiary basement rocks are exposed (Verbeek and Fennema, 1896; Duyfjes, 1940; van Bemmelen, 1949; Sukamto, 1975). In plate tectonic point of view, Ciletuh has been known as place outcropping melange complex related to pre-Tertiary oceanic plate subduction (Thayyib et al., 1977). Ciletuh subduction regionally has been linked to the Cretaceous subduction zones of Luk Ulo/Karang Sambung (Central Java) and Meratus Mountains (South Kalimantan) (Hutchison, 1973; Asikin 1974; Hamilton, 1979). Ciletuh subduction however, has not been dated using metamorphic rocks formed in its subduction zone. Its link to Luk Ulo and Meratus subduction zone only based on the presence of melange, which also lacks of data Meanwhile, subduction zones of Luk Ulo and Meratus have been dated and analysed. We herewith present the results of new field studies and various analyses carried out in the last five years of the Ciletuh subduction complex. The indication of Cretaceous subduction has not found from the date measurement, Ciletuh shows Eocene related subduction. Most of the ophiolites were island-arc tholeiitic or island-arc basalt formed in supra-subduction zone. The overlying olistostrome deposits were younger than previously considered and lasted until early/middle Miocene. Some of the basaltic pillowed lava is considered as part of the ophiolite, while the ones at Gunung Badak is more likely a part of the early Miocene Jampang volcanism. Link of Ciletuh to Early Cretaceous subduction of Luk Ulo is not supported by geochronological data. The new knowledge of Ciletuh subduction implies the pre-Tertiary and Paleogene geology of Java, and petroleum prospectivities of the Paleogene objectives of southern West Java. New problems arise and need more field data and analyses to find out the answers.
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Zelenski, Michael, and Vadim Kamenetsky. "Sulfides and Noble Metals in Primitive Arc Basalts." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.3076.

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Traven, Katja, Mark Češnovar, Barbara Horvat, and Vilma Ducman. "The Influence of Different Fibres Quantity on Mechanical and Microstructural Properties of Alkali-activated Foams." In International Conference on Technologies & Business Models for Circular Economy. University of Maribor Press, 2022. http://dx.doi.org/10.18690/um.fkkt.2.2022.9.

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Alkali activated foams (AAFs) were produced using electric arc furnace steel slag (EAF) and ladle furnace basic slag (LS), obtained from two metallurgical companies in Slovenia. They were activated with a mixture of sodium water glass (Na2SiO3) and solid NaOH and foamed with hydrogen peroxide (H2O2). Pores were stabilized with the addition of Triton as a surfactant. Four types of fibres were added to the studied mixture (polypropylene (PP), polyvinyl-alcohol (PVA), basalt (B), and glass wool (GW)) in five different quantities: 0.5, 1.0, 1.25, 1.5 and 2.0 vol % in order to additionally stabilize the structure and thus improve its mechanical properties. The results of mechanical properties showed, that compressive strength was increased in all 20 specimens, partially due to the increased density as well as to the fibre addition. Flexural strength on the other hand was the most improved in the samples where PP and PVA fibres were added. The samples with the addition of B and GW fibres on the other hand showed only small or no improvement in flexural strength in comparison to the referenced sample. Additionally, the microstructure of used fibres and selected foams was also investigated by the means of SEM analysis.
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Rezeau, Hervé, Benjamin Klein, and Oliver Jagoutz. "Mixing damp and wet basalts in the deep arc crust: a new recipe to form uniform differentiated arc melts?" In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.8120.

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Salim, Salim Akhtar, and Ashima Saikia Ashima. "Basalts with Back-Arc MORB Affinity from the South Andaman Ophiolite Belt, India." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2269.

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Звіти організацій з теми "Arc basalt"

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Manor, M. J., and S. J. Piercey. Whole-rock lithogeochemistry, Nd-Hf isotopes, and in situ zircon geochemistry of VMS-related felsic rocks, Finlayson Lake VMS district, Yukon. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328992.

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The Finlayson Lake district in southeastern Yukon is composed of a Late Paleozoic arc-backarc system that consists of metamorphosed volcanic, plutonic, and sedimentary rocks of the Yukon-Tanana and Slide Mountain terranes. These rocks host &amp;gt;40 Mt of polymetallic resources in numerous occurrences and styles of volcanogenic massive sulphide (VMS) mineralization. Geochemical and isotopic data from these rocks support previous interpretations that volcanism and plutonism occurred in arc-marginal arc (e.g., Fire Lake formation) and continental back-arc basin environments (e.g., Kudz Ze Kayah formation, Wind Lake formation, and Wolverine Lake group) where felsic magmatism formed from varying mixtures of crust- and mantle-derived material. The rocks have elevated high field strength element (HFSE) and rare earth element (REE) concentrations, and evolved to chondritic isotopic signatures, in VMS-proximal stratigraphy relative to VMS-barren assemblages. These geochemical features reflect the petrogenetic conditions that generated felsic rocks and likely played a role in the localization of VMS mineralization in the district. Preliminary in situ zircon chemistry supports these arguments with Th/U and Hf isotopic fingerprinting, where it is interpreted that the VMS-bearing lithofacies formed via crustal melting and mixing with increased juvenile, mafic magmatism; rocks that were less prospective have predominantly crustal signatures. These observations are consistent with the formation of VMS-related felsic rocks by basaltic underplating, crustal melting, and basalt-crustal melt mixing within an extensional setting. This work offers a unique perspective on magmatic petrogenesis that underscores the importance of integrating whole-rock with mineral-scale geochemistry in the characterization of VMS-related stratigraphy.
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Mueller, C., S. J. Piercey, M. G. Babechuk, and D. Copeland. Stratigraphy and lithogeochemistry of rocks from the Nugget Pond Deposit area, Baie Verte Peninsula, Newfoundland. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/328989.

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Stratigraphic and lithogeochemical data were collected from selected drill core from the Nugget Pond gold deposit in the Betts Cove area, Newfoundland. The stratigraphy consists of a lower unit of basaltic rocks that are massive to pillowed (Mount Misery Formation). This is overlain by sedimentary rocks of the Scrape Point Formation that consist of lower unit of turbiditic siltstone and hematitic cherts/iron formations (the Nugget Pond member); the unit locally has a volcaniclastic rich-unit at its base and grades upwards into finer grained volcaniclastic/turbiditic rocks. This is capped by basaltic rocks of the Scrape Point Formation that contain pillowed and massive mafic flows that are distinctively plagioclase porphyritic to glomeroporphyritic. The mafic rocks of the Mount Misery Formation have island arc tholeiitic affinities, whereas Scrape Point Formation mafic rocks have normal mid-ocean ridge (N-MORB) to backarc basin basalt (BABB) affinities. One sample of the latter formation has a calc-alkalic affinity. All of these geochemical features are consistent with results and conclusions from previous workers in the area. Clastic sedimentary rocks and Fe-rich sedimentary rocks of the Scrape Point Formation have features consistent with derivation from local, juvenile sources (i.e., intra-basinal mafic rocks). The Scrape Point Formation sedimentary rocks with the highest Fe/Al ratios, inferred to have greatest amount of hydrothermally derived Fe, have positive Ce anomalies on Post-Archean Australian Shale (PAAS)-normalized trace element plots. These features are consistent with having formed via hydrothermal venting into an anoxic/ sub-oxic water column. Further work is needed to test whether these redox features are a localized feature (i.e., restricted basin) or a widespread feature of the late Cambrian-early Ordovician Iapetus Ocean, as well as to delineate the role that these Fe-rich sedimentary rocks have played in the localization of gold mineralization within the Nugget Pond deposit.
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Arbib, Michael A. Mechanisms of the Basal Ganglia for Arm-Hand Coordination. Fort Belvoir, VA: Defense Technical Information Center, September 1996. http://dx.doi.org/10.21236/ada315470.

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Kuster, K., C. M. Lesher, and M. G. Houlé. Geology and geochemistry of mafic and ultramafic bodies in the Shebandowan mine area, Wawa-Abitibi terrane: implications for Ni-Cu-(PGE) and Cr-(PGE) mineralization, Ontario and Quebec. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329394.

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The Shebandowan Ni-Cu-(PGE) deposit occurs in the Shebandowan greenstone belt in the Wawa-Abitibi terrane. This deposit is one of a few economic Ni-Cu-(PGE) deposits in the Superior Province and one of a very few deposits worldwide that contains both Ni-Cu-(PGE) and Cr-(PGE) mineralization. The mafic-ultramafic successions in the area comprise abundant flows and sills of tholeiitic basalt and lesser Al-undepleted komatiite (MgO &amp;gt;18 wt%, Al2O3/TiO2 = 15-25), the latter indicating separation from mantle sources at shallow levels. Siliceous high-Mg basalts (MgO 8-12 wt%, SiO2 &amp;gt; 53 wt%, TiO2 &amp;lt; 1.2 wt%, La/Sm[MN] &amp;lt; 1-2) are relatively abundant in the area and likely represent crustally contaminated komatiites. Ultramafic bodies in the Shebandowan mine area comprise at least three or four komatiitic sills (A-B, C, D) and at least two komatiitic flows (E, F), all of which are altered to serpentinites or talc-carbonate schists with relict igneous chromite and rare relict igneous orthopyroxene-clinopyroxene. Unit A-B contains pentlandite-pyrrhotite-chalcopyrite-pyrite-magnetite mineralization, occurring as massive sulfides, sulfide breccias, or stringers, and subeconomic chromite mineralization in contorted massive bands varying from a few millimetres up to 10 metres thick. The localization of massive and semi-massive Ni-Cu-(PGE) ores along the margins of Unit A and the paucity of disseminated and net-textured ores suggest tectonic mobilization. Chromite is typically zoned with Cr-Mg-Al-rich (chromite) cores and Fe-rich (ferrichromite/magnetite) rims due to alteration and/or metamorphism, but rarely contains amoeboid magnetite cores. The thickness of chromite in Unit B is too great to have crystallized in cotectic proportion from the komatiitic magma and a model involving dynamic upgrading of magnetite xenoliths derived from interflow oxide facies iron formations is being tested.
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Sessa, Guido, and Gregory Martin. Role of GRAS Transcription Factors in Tomato Disease Resistance and Basal Defense. United States Department of Agriculture, 2005. http://dx.doi.org/10.32747/2005.7696520.bard.

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The research problem: Bacterial spot and bacterial speck diseases of tomato are causedby strains of Xanthomonas campestris pv. vesicatoria (Xcv) and Pseudomonas syringae pv.tomato (Pst), respectively. These bacteria colonize aerial parts of the plant and causesignificant losses in tomato production worldwide. Protection against Xcv and Pst bycultural practices or chemical control has been unsuccessful and there are only limitedsources of genetic resistance to these pathogens. In previous research supported in part byBARD IS-3237-01, we extensively characterized changes in tomato gene expression uponthe onset of spot and speck disease resistance. A remarkable finding of these studies wasthe inducibility in tomato leaves by both Xcv and Pst strains of genes encodingtranscriptional activator of the GRAS family, which has not been previously linked todisease resistance. Goals: Central goals of this research were to investigate the role of GRAS genes in tomatoinnate immunity and to assess their potential use for disease control.Specific objectives were to: 1. Identify GRAS genes that are induced in tomato during thedefense response and analyze their role in disease resistance by loss-of-function experiments.2. Overexpress GRAS genes in tomato and characterize plants for possible broad-spectrumresistance. 3. Identify genes whose transcription is regulated by GRAS family. Our main achievements during this research program are in three major areas:1. Identification of tomato GRAS family members induced in defense responses andanalysis of their role in disease resistance. Genes encoding tomato GRAS family memberswere retrieved from databases and analyzed for their inducibility by Pst avirulent bacteria.Real-time RT-PCR analysis revealed that six SlGRAS transcripts are induced during theonset of disease resistance to Pst. Further expression analysis of two selected GRAS genesshowed that they accumulate in tomato plants in response to different avirulent bacteria orto the fungal elicitor EIX. In addition, eight SlGRAS genes, including the Pst-induciblefamily members, were induced by mechanical stress in part in a jasmonic acid-dependentmanner. Remarkably, SlGRAS6 gene was found to be required for tomato resistance to Pstin virus-induced gene silencing (VIGS) experiments.2. Molecular analysis of pathogen-induced GRAS transcriptional activators. In aheterologous yeast system, Pst-inducible GRAS genes were shown to have the ability toactivate transcription in agreement with their putative function of transcription factors. Inaddition, deletion analysis demonstrated that short sequences at the amino-terminus ofSlGRAS2, SlGRAS4 and SlGRAS6 are sufficient for transcriptional activation. Finally,defense-related SlGRAS proteins were found to localize to the cell nucleus. 3. Disease resistance and expression profiles of transgenic plants overexpressing SlGRASgenes. Transgenic plants overexpressing SlGRAS3 or SlGRAS6 were generated. Diseasesusceptibility tests revealed that these plants are not more resistant to Pst than wild-typeplants. Gene expression profiles of the overexpressing plants identified putative direct orindirect target genes regulated by SlGRAS3 and SlGRAS6. Scientific and agricultural significance: Our research activities established a novel linkbetween the GRAS family of transcription factors, plant disease resistance and mechanicalstress response. SlGRAS6 was found to be required for disease resistance to Pstsuggesting that this and possibly other GRAS family members are involved in thetranscriptional reprogramming that takes place during the onset of disease resistance.Their nuclear localization and transcriptional activation ability support their proposed roleas transcription factors or co-activators. However, the potential of utilizing GRAS familymembers for the improvement of plant disease resistance in agriculture has yet to bedemonstrated.
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Spencer, Trina, Kerstin Tönsing, and Shakila Dada. Augmentative and Alternative Communication (AAC) Interventions that Promote Labeling, Commenting, and Telling: A Systematic Review Protocol. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, April 2022. http://dx.doi.org/10.37766/inplasy2022.4.0078.

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Review question / Objective: The aim of this systematic review is to identify and describe the augmentative and alternative communication (AAC) interventions that improve the labeling, commenting, and telling skills of children with communication disabilities. To that end, the following questions will be addressed: What is the quality and quantity of research investigating AAC interventions to promote labeling, commenting, and telling skills of children with communication disabilities? Which (if any) AAC interventions have sufficient empirical evidence to support their recommendation in practice for teaching children with communication disabilities labeling, commenting, and telling skills? Condition being studied: Speech is the primary modality of communication and socialization. However, not all individuals develop functional speech due to a variety of developmental or acquired disabilities, such as autism spectrum disorders (ASD), cerebral palsy (CP), or traumatic brain Injury. Although diagnoses vary, all these individuals share the condition of being unable to meet all the communication needs that others without disabilities typically meet through speech. Such Individuals are typically described as having complex communication needs or a severe communication disorder, or as requiring augmentative and alternative communication (Von Tetzchner & Basil, 2011).
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Iglesias, Paula, Juan de Dios Ortúzar, Álvaro Rodríguez-Valencia, Francisca Giraldez Zúñiga, and Agustina Calatayud. Abierta configuration options Entendiendo la elección modal del automóvil en ciudades de ALC. Inter-American Development Bank, February 2022. http://dx.doi.org/10.18235/0003975.

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En las últimas décadas el uso del automóvil particular y la motocicleta ha aumentado significativamente en muchas ciudades de América Latina y el Caribe (ALC). Junto con la rápida urbanización y el descenso en el uso del transporte público, el mayor uso de vehículos privados ha tenido un severo impacto en los niveles de congestión, contaminación, accidentes y ruido. En este contexto, este estudio busca explicar por qué los habitantes de dos ciudades de ALC -Bogotá (Colombia) y Santiago (Chile)- prefieren utilizar la movilidad privada frente a otros modos. La metodología utilizada se basa en el levantamiento de información de preferencias reveladas (PR) y técnicas econométricas para modelar el comportamiento de los usuarios, permitiendo: (1) estudiar el efecto del hábito y otros factores subjetivos en el uso del automóvil; (2) identificar el efecto de la estructura familiar y del viaje en el uso del carro; (3) examinar el potencial impacto de la adquisición del vehículo; y (4) estudiar el fenómeno de tenencia en su relación con el hogar y su entorno. El documento finaliza con una sección de discusiones de política pública para incentivar el cambio modal y, con ello, impulsar una movilidad más sostenible en las ciudades de la región.
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Eshed, Yuval, and Sarah Hake. Shaping plant architecture by age dependent programs: implications for food, feed and biofuel. United States Department of Agriculture, December 2012. http://dx.doi.org/10.32747/2012.7597922.bard.

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Age dependent programs are responsible for the physiological and developmental differences of young and mature plants. These include a range of morphological characters such as leaf shape and leaf composition (waxes, lignin etc..) but also different in developmental potentials. Apical buds of juvenile plants are vegetative, while those of mature plants can be reproductive. Likewise, basal buds form in the axills of juvenile leaves have different fates than distal buds formed in the axils of mature leaves. The goal of our joint project is to understand and exploit theses age related programs for specific improvement of crop plants. To that end both the WIS group and the PGEC group are using mutants with age related defects as well as modified expression of miR156 to modify age related programs in crop plants- Tomato and potato in Israel and Maize, switchgrass and Brchipodium in the US. In the US, major effort were made to: Characterize the contribution of selected miR156 target genes to yield component traits of maize. Functional analysis of microRNAs and their targets in new crop plants. In Israel, the research progressed in several directions: Understanding the interplay between age dependent programs and the potential of tomato and potato meristems to produce tubers. Evaluation of the agronomic value of mutants that alter flowering regime in side shoots in general, and in the sympodial buds in particular Characterization of wild type axillary buds, comparing shoot ontogeny of gradually maturing apices from basal and distal positions along the main shoot of tomato.
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Andrades, Oscar, David Ulloa, Dario Martinez, Francisco Guede, Gustava Muñoz, Luis Javier Chirosa, and Amador García. Effect of the manipulation of the variables that configure the stimulus of strength training on motor symptoms in people with Parkinson's disease: A Systematic Review. INPLASY - International Platform of Registered Systematic Review and Meta-analysis Protocols, November 2022. http://dx.doi.org/10.37766/inplasy2022.11.0079.

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Review question / Objective: To analyze the evidence on studies that have manipulated the variables that make up the strength training stimulus and its effects on motor symptoms in people with Parkinson's disease. Condition being studied: Parkinson's is a multisystemic neurodegenerative disease that affects the central nervous system and is caused by a loss of dopaminergic neurons in the compact part of the substantia nigra of the basal ganglia of the midbrain. People with Parkinson's disease (PEP) have non-motor and motor clinical symptoms. Classic motor symptoms are rest tremor, joint stiffness, bradykinesia, decreased balance, gait disturbances (speed, temporality, spatiality, support, and freezing) and decreased functional performance.
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Савосько, Василь Миколайович, Наталія Вікторівна Товстоляк, Юрій Васильович Лихолат, and Іван Панасович Григорюк. Structure and Diversity of Urban Park Stands at Kryvyi Rih Ore-Mining & Metallurgical District, Central Ukraine. Podgorica, 2020. http://dx.doi.org/10.31812/123456789/3946.

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The present study examines the relationships between structure (floristic composition, dendrometric parameters), diversity (diversity and evenness indexes) of urban forest park stands and the ecological (soil fertility, soil moisture), environmental factors (air pollution). The study is based on the forest park stands inventory data, performed from 2012 to 2017 in Kryvyi Rih City, Central Ukraine. The floristic compositions of the urban forest park stands are poor. There are only 23 species that belong to 14 families and 12 genera. More families were represented by at least more than 2% of taxon diversity. While Ulmaceae (2 genera, 4 species–17,39 %), Fabaceae (3 genera, 2 species–17,39 %), Aсеrасеае (1 genera, 4 species–17,39 %) were the most representative families. It was established that at forest park the values of stand density varied from 490 to 660 trees*ha-1, stem heights were from 26 to 31 m, stem diameters were from 13 to 17 cm, stand basal area were from 32 to 49 m2*ha-1, stand volume were from 200 to 415 m3*ha-1. the values of relative stem heights were from 0,63 to 0,82 m*year-1, relative stem diameters were from 0,31 to 0,43 cm*year-1, relative stand basal area were from 0,80 to 1,19 m2*ha-1*year-1, relative stand volume were from 5,45 to 10,28 m3*ha-1*year-1. The varied values of the forest park stands index (Shannon-Wiener diversity index from 0,75 to 1,61, Pielou‟s evenness index from 0,53 to 0,86, Simpson‟s diversity from 0,24 to 0,60, Margalef‟s diversity index from 0,87 to 6,97) indicate the ecological instability of these woody plant communities. Current state of the urban forest park stands determined by the combined influence of ecological (soil fertility, soil moisture) and environmental factors (air pollution).
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