Academic literature on the topic 'Co-magmatism'
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Journal articles on the topic "Co-magmatism"
Mjelde, R., and J. I. Faleide. "Variation of Icelandic and Hawaiian magmatism: evidence for co-pulsation of mantle plumes?" Marine Geophysical Researches 30, no. 1 (March 2009): 61–72. http://dx.doi.org/10.1007/s11001-009-9066-0.
Full textNardi, Lauro V. S., Jorge Plá-Cid, Maria de Fátima Bitencourt, and Larissa Z. Stabel. "Geochemistry and petrogenesis of post-collisional ultrapotassic syenites and granites from southernmost Brazil: the Piquiri Syenite Massif." Anais da Academia Brasileira de Ciências 80, no. 2 (June 2008): 353–71. http://dx.doi.org/10.1590/s0001-37652008000200014.
Full textWU, FU-YUAN, ROGER H. MITCHELL, QIU-LI LI, CHANG ZHANG, and YUE-HENG YANG. "Emplacement age and isotopic composition of the Prairie Lake carbonatite complex, Northwestern Ontario, Canada." Geological Magazine 154, no. 2 (February 12, 2016): 217–36. http://dx.doi.org/10.1017/s0016756815001120.
Full textNIGAI, Elena. "Udurchukan formation and ayakit complex (Bureya massif, Sikhote-Alin): location, age and geochemistry." Domestic geology, no. 6 (January 28, 2022): 85–99. http://dx.doi.org/10.47765/0869-7175-2021-10033.
Full textUdry, Arya, and James M. D. Day. "1.34 billion-year-old magmatism on Mars evaluated from the co-genetic nakhlite and chassignite meteorites." Geochimica et Cosmochimica Acta 238 (October 2018): 292–315. http://dx.doi.org/10.1016/j.gca.2018.07.006.
Full textPribavkin, S. V., N. S. Borodina, and M. V. Chervyakovskaya. "Geochemistry of trace elements in rock-forming minerals of gneisses and granites of the Murzinka granite area, Central Urals." МИНЕРАЛОГИЯ (MINERALOGY), no. 3 (October 28, 2020): 74–88. http://dx.doi.org/10.35597/2313-545x-2020-6-3-6.
Full textPerna, Maria, Daria Zaccaria, Gianluigi Rosatelli, Francesco Stoppani, Ezio Curti, John Spratt, Emma Humphreys-Williams, et al. "Dissolution-Repackaging of Hellandite-(Ce), Mottanaite-(Ce)/Ferri-Mottanaite-(Ce)." Minerals 11, no. 6 (June 7, 2021): 610. http://dx.doi.org/10.3390/min11060610.
Full textBateman, Paul C. "Aspects of Magmatism: The Nature and Origin of Cordilieran Magmatism . J. Lawford Anderson, Ed. Geological Society of America, Boulder, CO, 1990. xii, 414 pp., illus. $65. Geological Society of America Memoir 174." Science 252, no. 5005 (April 26, 1991): 589–90. http://dx.doi.org/10.1126/science.252.5005.589.b.
Full textBateman, Paul C. "Aspects of Magmatism: The Nature and Origin of Cordilieran Magmatism . J. Lawford Anderson, Ed. Geological Society of America, Boulder, CO, 1990. xii, 414 pp., illus. $65. Geological Society of America Memoir 174." Science 252, no. 5005 (April 26, 1991): 589–90. http://dx.doi.org/10.1126/science.252.5005.589-b.
Full textFan, Yunsong, Jinjiang Zhang, Chao Lin, Xiaoxian Wang, and Bo Zhang. "Miocene granitic magmatism constrains the early E-W extension in the Himalayan Orogen: A case study of Kung Co leucogranite." Lithos 398-399 (October 2021): 106295. http://dx.doi.org/10.1016/j.lithos.2021.106295.
Full textDissertations / Theses on the topic "Co-magmatism"
Rowe, S. E. "Mechanism of formation and age of the Ayyarmalai A-type charnockite – granite association from the south-eastern Palghat- Cauvery Shear System, southern India." Thesis, 2010. http://hdl.handle.net/2440/104030.
Full textThe Ayyarmalai A-type charnockite and A-type alkali granite lies on the south-eastern margin of the Palghat-Cauvery Shear System and provides an example of co-magmatism that was later overprinted with granulite facies metamorphism at ~2.45-2.5Ga. The Palghat-Cauvery Shear System represents an intriguing zone with Neoproterozoic aged granulites (~800-500 Ma) to the south and Archaean granulites (~3000-2500 Ma) to the north; the origins of which are still often disputed. This study presents whole rock major and trace element compositions, mineral chemistry, pressure-temperature estimates and whole rock Sm-Nd, Rb-Sr, Pb-Pb and δ18O isotopic compositions of this A-type charnockite-granite association found at Ayyarmalai, Tamil Nadu, Southern India. The subsequent data from this study suggests that: (1) the Ayyarmalai charnockites from the Palghat-Cauvery Shear System have zircon ages that are synchronous with events in the Northern Granulite Terrain; (2) The Dharwar Craton is a strong candidate for the protolith of these rocks; (3) Evidence of a Neoproterozoic-Cambrian granulite metamorphic event (~520 Ma) appears to be absent in these rocks questioning the existence or location of a Neoproterozoic - Cambrian suture zone proposed for the Palghat-Cauvery Shear System recently. U-Pb zircon ages show zoned igneous cores ~2.65-2.68 Ga ages in both rock types defining the crystallisation age, while the large metamorphic rim overgrowths date the Archaean granulite metamorphic event at ~2.45 - 2.5 Ga. Geochemical data of the Ayyarmalai charnockites reveal a very primitive, unfractionated REE pattern with no Eu-anomaly, ferroan, high K-calc-alkaline, with moderate enrichment of LREE with respect to HREE and fall within the field of high Ba-Sr type granitoids. Extraction of Pyroxene- Hornblende rich cumulates resulted in an intermediate charnockites driving the crystallisation towards the final A-type alkali granite. The A-type alkali granites show a more fractionated REE pattern with a significant Eu-anomaly, ferroan, high-K- calc-alkaline, with enrichment of LREE and depletion in the low Ba-Sr type granitoids. εNd and Nd model ages indicate a highly evolved protolith (εNd(0) =-25.15 to -33.14) that encountered a crustal Archaean source (2.89-3.09 Ga) causing contamination as the magmas ascended. Harker diagrams, Nd data (isochron age, ~2519 Ma) and U-Pb zircon crystallisation ages suggest a co-magmatic relationship between the charnockite and alkali granite. Conventional geothermometry/barometry suggest minimum pressure-temperature conditions existed at 740 – 750°C and P=5.61 – 5.84 kbar. The data presented from this study is consistent with a magmatic origin of these charnockites favouring the early crystallisation of orthopyroxene. The correlation with the data from the Dharwar Craton suggest that the study region may have encountered Dharwar Craton on magmatic ascent causing crustal contamination
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2010
Neres, Marta. "Magnetic studies of the Late Cretaceous magmatism in Portugal : from Iberian plate kinematics to magnetic fabrics." Doctoral thesis, 2014. http://hdl.handle.net/10451/10562.
Full textThe Jurassic-Cretaceous Iberian kinematics is still not well understood, mainly due to limitations on reconstructions based on marine magnetic anomalies (uncertainties about the nature of the crust and presence of the Cretaceous Normal Superchron) and on paleomagnetic data (insu cient and sometimes low-quality data, low age resolution, tectonic in uences and remagnetizations). In this thesis, we rst provide new high-quality paleomagnetic poles for the Late Cretaceous of Iberia, calculated from two ma c sills (Foz da Fonte, 88 Ma et Pa co de Ilhas, 94 Ma), which enable better calibrating the Iberian apparent polar wander path (APWP) at the Late Cretaceous. A detailed study of magnetic mineralogy and microscopic observations (electronic and optic) con rm a primary magnetization carried by titanomagnetite. We then present a new compilation of the published paleomagnetic data for the Late Jurassic-Cretaceous of Iberia from which we calculate mean poles for six time periods. By rotating these mean poles to the African frame using Euler rotation poles from kinematic models we evaluate their position with respect to the global APWP in African coordinates. We verify that while post-rift mean poles (from 70 to 120 Ma) are in agreement with the APWP, poles corresponding to pre-rift times (older than 120 Ma) do not t the APWP, revealing an incompatibility between the di erent types of data. We next seek for the cause of this incompatibility, which may be due to the APWP (we show that this is unlikely since di erences between di erent APWPs are not signi cative), euler poles (we show that a discard is veri ed using both end-member models of Olivet [1996] and Vissers & Meijer [2012]) and/or paleomagnetic data. We solve the inverse problem of nding the Euler poles that t the pre-rift mean paleomagnetic poles with the GAPWP and then test their implications on Iberian reconstructions. We nd that Iberian poles from the Early Cretaceous (mean poles for 123 and 130 Ma) are incompatible with the GAPWP, bringing into question their validity. Contrarily, Late Jurassic data (mean pole at 151 Ma) are compatible with the GAPWP and thus can be considered reliable. These results enable us to constrain a reconstruction of Iberia and surrounding plates at 150 Ma. These results highlight that more high-quality paleomagnetic data are needed for the Iberian plate particularly at the Early Cretaceous, and that kinematic models based on the interpretation of marine magnetic anomalies should be reviewed. In the last part of this thesis we present a study of the anisotropy of magnetic susceptibility of the Foz da Fonte sill, 7-8 m width. A detailed vertical sampling of the sill allowed us to distinguish three domains with respect to the magnetic fabric, which we relate with distinct regimes of magma ow. The chilled margins, 50 cm apart from the margins, where low anisotropies suggest low velocity gradients and heterogeneous ow paths during initial emplacement stages; in the center of the sill, where undisturbed magma ow is expected, low anisotropies suggest low shear gradients and magma displacement close to pure translation; and intermediate zones, where high anisotropy values are ascribed to maximum shear gradient zones. A mean orientation at N310 of the magnetic lineation agrees with the direction of elongation of vesicles and is interpreted as magma ow direction. In addition, a sense of ow toward the southeast is inferred from the mirror imbrication of the magnetic foliation and lineation at the borders. Implications of these results are discussed with respect to the West Iberian Late Cretaceous magmatism, by integrating magnetic anomalies, isotope chronology and tectonics. The Cabo Raso anomaly is proposed as the magmatic source of the Foz da Fonte sill, and a 350 km long magmatic structure is proposed to connect the region of Sintra-Cabo Raso to the Tore seamount.
Fundação para a Ciência e a Tecnologia (FCT, projetos PEst-OE/CTE/LA0019/2013, PTDC/CTE-GIX/117298/2010, PTDC/CTEGIN/68462/2006); TOPOMED (TOPOEUROPE/0001/2007); Prémio Fundação Calouste Gulbenkian
Conference papers on the topic "Co-magmatism"
Swenton, Vanessa, Martin Streck, Daniel P. Miggins, and William McIntosh. "NEWLY DISCOVERED PERIODICITY IN MIOCENE, HIGH LAVA PLAINS AND CO-CRBG RHYOLITES OF EASTERN OREGON TIED TO COEVAL BASALT MAGMATISM AND REGIONAL EXTENSION EVENTS." In GSA Connects 2021 in Portland, Oregon. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021am-365951.
Full textGutierrez, Evelyn P., Emilie Bowman, Sarah Medysnki, Cathy J. Busby, Margarita López Martínez, Tina M. Niemi, and Valente O. Salgado Muñoz. "MIOCENE VOLCANISM IN THE SANTA ROSALIA REGION, GULF OF CALIFORNIA, BAJA CALIFORNIA: NATURE OF THE ARC-TO-RIFT TRANSITION AND POSSIBLE ROLE OF RIFT-TRIGGERED ADAKITE MAGMATISM IN GENERATING BOLEO STRATIFORM CU-CO-ZN SULFIDES." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-285426.
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