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Academic literature on the topic 'Authigenic titanite'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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Journal articles on the topic "Authigenic titanite"

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Ayupova, N. R., V. V. Maslennikov, and V. V. Shilovskikh. "Authigenic Ti mineralization as an indicator of halmyrolysis of carbonatesulfide-hyaloclastite sediments in Urals massive sulfide deposits." LITHOSPHERE (Russia) 22, no. 6 (January 7, 2023): 847–58. http://dx.doi.org/10.24930/1681-9004-2022-22-6-847-858.

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Research subject. The horizons of ferruginous sedimentary rocks in the massive sulfide deposits of the Urals.Aim. To estimate the Ti behavior upon halmyrolytic transformation and lithogenesis of calcareous hyaloclastites and carbonatesulfide-hyaloclastite sediments.Materials and methods. Microtextures of authigenic aggregates of Ti minerals (anatase, rutile, titanite) in jasperites and gossanites of various Urals massive sulfide deposits were studied. The minerals were identified using microscopic and electron microscopic methods, as well as electron back-scattered diffraction.Results. Upon partial halmyrolysis of calcareous hyaloclastites, Ti was removed with the formation of authigenic anatase rims around hematitized hyaloclasts. The full transformation of hyaloclastites to hematite-quartz jasperites resulted in decomposition of authigenic Ti minerals. Authigenic rutile and titanite formed in gossanites (hematite-quartz and hematite-chlorite products of submarine oxidation of calcareous sulfide-hyaloclastite sediments). The occurrence of abundant bacteriomorphic structures in corroded hyaloclasts indicates a significant role of bacteria in halmyrolysis.Conclusions. Titanium for the formation of Ti minerals in ferruginous sediments was sourced from hyaloclastites. The halmyrolysis of calcareous hyaloclastite sediments and related formation of jasperites occurred under alkaline conditions favorable for the transportation of Ti in the form of hydroxycarbonate complexes. The formation of rutile instead of anatase was associated with lower pH values (<5) due to oxidation of pyrite in sulfide-bearing hyaloclastite sediments. Titanite formed as a result of further alteration of Ti-bearing phases. Our results solve the fundamental problem of Ti mobility during halmyrolysis of hyaloclastites, which contradicts its commonly accepted immobility in hydrothermal processes.
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Novoselov, Alexey A., Dailto Silva, and Carlos Roberto de Souza Filho. "Authigenic titanite in weathered basalts: Implications for paleoatmospheric reconstructions." Geoscience Frontiers 11, no. 6 (November 2020): 2183–96. http://dx.doi.org/10.1016/j.gsf.2020.03.012.

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Chaikovski, I. I., E. V. Chaikovskaya, O. V. Korotchenkova, E. P. Chirkova, and T. A. Utkina. "Authigenic minerals of titanium and zirconium of the Verkhnekamskoye salt deposit." Геохимия 64, no. 2 (March 15, 2019): 182–94. http://dx.doi.org/10.31857/s0016-7525642182-194.

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Newly formed titanium oxides and zircons have been identified in the salt and suprasalt of the Verkhnekamskoye Salt Deposit. These features have been associated with the hydrolysis of clay material and the release of colloidal titanium and zirconium hydroxide during diagenesis, catagenesis, and hypergenesis. This is made possible by sulfate reduction and the acidic environment, which are caused by the radiation–oxidation of Fe2+ from sylvite and carnallite. Anatase is formed both in the suprasalt and salt measures and, only in the lower part of the salt measures, in the rutile. Such a distribution can be associated both with an increase in the degree of catagenetic transformation of salt rocks with depth and with the composition of coexisting sulfate or chloride brines. A typical form of anatase crystals is pinacoid, but this is replaced by a dipyramidal structure in the carnallite zone, which is the location of the most acidic brine. Three types of twins were recorded for rutile, the formation of which is attributable to the growth of a dehydrated colloid of titanium hydroxide on a finely dispersed aggregate. The impurities V, Cr, and Zr (Al, Si, and Fe) established in the titanium oxides reflect the geochemical specialization of the aluminosilicate terrigenous material sources.
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Chaikovskiy, I. I., E. V. Chaikovskaya, O. V. Korotchenkova, E. P. Chirkova, and T. A. Utkina. "Authigenic Titanium and Zirconium Minerals at the Verkhnekamskoe Salt Deposit." Geochemistry International 57, no. 2 (February 2019): 184–96. http://dx.doi.org/10.1134/s0016702919020046.

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Ixer, R. A., P. Turner, and B. Waugh. "Authigenic iron and titanium oxides in Triassic red beds: (St. Bees Sandstone), Cumbria, Northern England." Geological Journal 14, no. 1 (April 30, 2007): 179–92. http://dx.doi.org/10.1002/gj.3350140114.

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Ixer, R. A., P. Turner, and B. Waugh. "Authigenic iron and titanium oxides in triassic red beds: (St. Bees Sandstone), Cumbria, Northern England." Geological Journal 14, no. 2 (April 16, 2008): 179–92. http://dx.doi.org/10.1002/gj.3350140214.

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Pan, Mengdi, Daidai Wu, Fei Yang, Tiantian Sun, Nengyou Wu, and Lihua Liu. "Geochemical sedimentary evidence from core 973-2 for methane activity near the Jiulong Methane Reef in the northern South China Sea." Interpretation 6, no. 1 (February 1, 2018): T163—T174. http://dx.doi.org/10.1190/int-2017-0001.1.

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The Jiulong Methane Reef, located on the northern slope of the South China Sea, is characterized by several features, such as bottom-simulating reflections and authigenic carbonates, which are indicative of methane seeps that are currently occurring as well as those that occurred in the past. However, to date, the effect that these methane seeps have on the sedimentary environment is not completely clear. To provide further insights into the biogeochemical processes involved in methane seeps, a 6.73 m piston core (973-2) was retrieved from this area in 2011 to perform an in-depth analysis. The chronology of the core has been established by [Formula: see text] dating, and sedimentary events since the last glacial period have been recorded. The results indicate abnormally low abundance and diversity, as well as high infaunal percentages of benthic foraminiferal assemblages in the lower part of the core from 673 to 350 centimeters below the sea floor (cmbsf), indicating impacts from methane activities. Major elemental barium, bromine, and titanium, which serve as proxies of the paleoproductivity, organic contents, and terrestrial supply, respectively, are found to make little contribution in [Formula: see text] content. However, regardless of the factors mentioned above, the [Formula: see text] content is still higher in the lower part of core, indicating the presence of authigenic carbonates. In addition, the total organic carbon/total sulfur ratios of less than 400 cmbsf are found to be beyond the normal range, which is [Formula: see text], reflecting the effects of methane oxidation. In one of the sections, the trace metals and molybdenum profiles show enrichments that are closely related to those of the methane seeps. The results indicate that this area experienced methane seep events in the last glacial period.
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Brownfield, Michael E. "Characterization of feed coals and coal combustion byproducts from the Wyodak-Anderson coal zone, Powder River Basin, Wyoming." Mountain Geologist 57, no. 3 (July 1, 2020): 199–240. http://dx.doi.org/10.31582/rmag.mg.57.3.199.

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The U.S. Geological Survey (USGS) determined the physical and chemical properties of more than 260 feed coal and coal combustion byproducts from two coal-fired power plants. These plants utilized a low-sulfur (0.23-0.47 wt. % S) and low ash (4.9-6.3 wt. % ash) subbituminous coal from the Wyodak-Anderson coal zone in the Tongue River Member of the Paleocene Fort Union Formation, Powder River Basin, Wyoming. Fifty-three samples of bituminous coal were collected and analyzed from a Kentucky power plant, which used several sources of bituminous coals from the Appalachian and Illinois Basins. Based on scanning electron microscopy (SEM) and X-ray diffraction (XRD) analyses of feed coal samples collected and analyzed from 1996 through the late 2000s, two mineral suites were identified: (1) a primary or detrital suite consisting of quartz (including beta-form grains), biotite, feldspar, and minor zircon; and (2) a secondary authigenic mineral suite containing alumino-phosphates (crandallite and gorceixite), kaolinite, carbonates (calcite and dolomite), quartz, anatase, barite, and pyrite. The detrital mineral suite is interpreted, in part, to be of volcanic origin, whereas the authigenic mineral suite is interpreted, in part, to be the result of the alteration of the volcanic minerals. The mineral suites have contributed to the higher amounts of barium, calcium, magnesium, phosphorus, sodium, strontium, and titanium in the Powder River Basin feed coals in comparison to eastern US coals. XRD analysis indicates that (1) fly ash is mostly aluminate glass, perovskite, lime, gehlenite, quartz, and phosphates with minor amounts of periclase, anhydrite, hematite, and spinel group minerals; and (2) bottom ash is predominantly quartz, plagioclase (albite and anorthite), pyroxene (augite and fassaite), rhodonite, and akermanite, and spinel group minerals. Microprobe and SEM analyses of fly ash samples revealed quartz, zircon, and monazite, euhedral laths of corundum with merrillite, hematite, dendritic spinels/ferrites, wollastonite, and periclase. The abundant calcium and magnesium mineral phases in the fly ash are attributed to the alteration of carbonate, clay, and phosphate minerals in the feed coal during combustion. The calcium- and magnesium-rich and alumino-phosphate mineral phases in the coal combustion byproducts can be attributed to volcanic minerals deposited in peat-forming mires. Dissolution and alteration of these detrital volcanic minerals occurred either in the peat-forming stage or during coalification and diagenesis, resulting in the authigenic mineral suite. The presence of free lime (CaO) in fly ash produced from Wyodak-Anderson coal acts as a self-contained “scrubber” for SO3, where CaO + SO3 form anhydrite either during combustion or in the upper parts of the boiler. Considering the high lime content in the fly ash and the resulting hydration reactions after its contact with water, there is little evidence that major amounts of leachable metals are mobilized in the disposal or utilization of this fly ash.
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Solís-Castillo, Berenice, Christine Thiel, Héctor Cabadas Baez, Elizabeth Solleiro Rebolledo, Sergey Sedov, Birgit Terhorst, Bodo Damm, Manfred Frechen, and Sumiko Tsukamoto. "Holocene sequences in the Mayan Lowlands - A provenance study using heavy mineral distributions." E&G Quaternary Science Journal 62, no. 2 (December 20, 2013): 84–97. http://dx.doi.org/10.3285/eg.62.2.01.

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Abstract. Schwermineralanalysen an alluvialen Sedimenten und Paläoböden des Usumacinta-Flusses sind ein sehr effektives Werkzeug für die Rekonstruktion der relevanten Liefergebiete in den Tieflandgebieten der Mayas. Die mineralogischen Daten können für die pedostratigraphische Korrelation in der Region nützlich sein. Auf der Basis unserer Beobachtungen für Tierra Blanca ist die ultrastabile Schwermineralkomponente (zumeist Zirkon, Turmalin und Rutil) besonders erfolgversprechend für den Nachweis der Liefergebiete der Sedimente. Diese Minerale treten gemeinsam mit einer großen Vielfalt von sehr dichten authigenen Mineralen auf (u.a. Titanit). Unter Berücksichtigung der spezifischen Eigenschaften und der Alter von ausgewählten Horizonten, kann nun versucht werden, eine regionale Chronostratigraphie für Paläoböden und alluviale Sequenzen zu entwickeln. Unsere Daten deuten auf Sedimenttransport in Flussrinnen von den Hochländern Guatemalas gen Westen hin. Die untersuchten Schichten enthalten auch große Anteile an vulkanischen Mineralen mit frischen und eckigen Formen, was auf ein proximales Liefergebiet (wahrscheinlich Tacana Volcano, Mexico/Guatemala) hinweist.
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Novotný, Aleš, and Renata Čopjaková. "ALTERACE DETRITICKÉHO TITANITU V KULMU DRAHANSKÉ VRCHOVINY." Geologické výzkumy na Moravě a ve Slezsku 22, no. 1-2 (January 18, 2016). http://dx.doi.org/10.5817/gvms2015-1-2-19.

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Titanite is a common accessory mineral of magmatic rocks, low- and medium-grade metamorphic rocks and it occurs as a detrital mineral in clastic sediments. Our paper deals with titanite alterations as a result of interaction of diagenetic fluids with detrital titanite during deep burial of sedimentary rocks of Drahany Upland, Protivanov Formation. Detrital titanites and their alteration products were examined by electron microprobe. Titanite dissolution was observed from the rim and along the cracks, accompanied by the formation of an authigenic calcite, TiO2 phase, synchysite-(Ce), and rarely chlorite. With an increasing degree of alteration, detrital titanite occurs as small irregular relics inside a mixture of authigenic minerals. Based on the composition of authigenic minerals, we can suppose diagenetic fluid rich in CO2, F and Ca responsible for alteration of detrital titanite. The maximum temperatures in this area during deep burial of sedimentary rocks reached 250–300 °C, corresponding to the conditions of very low-grademetamorphism. Contents of REE (0.67–3.55 wt. % REE2O3) in detrital titanite are rather high and vary significantly. Authigenic synchysite-(Ce) compared with detrital titanite strongly prefers LREE over HREE, indicating that LREE released during dissolution of detrital titanite were preferentially incorporated into the structure of synchysite-(Ce), whereas HREE were mobilized and removed away by diagenetic fluids.
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Dissertations / Theses on the topic "Authigenic titanite"

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Bouch, Jonathan E. E. "Trace element geochemistry of authigenic heavy minerals in reservoir sandstones." Thesis, University of Aberdeen, 1996. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU089767.

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Authigenic growths of heavy minerals, crystallised under relatively low temperature diagenetic conditions have been recognised in a number of sedimentary sequence. A range of microbeam techniques have revealed trace element geochemical variations on several scales in authigenic titanites and apatites. These variations occur, within individual cement grains and patches, within a single sedimentary sequence, and between different sedimentary sequences. Mixed fluvial-aeolian, Permian, sediments at the Cock of Arran (Isle of Arran, Scotland) contain pore filling titanite cements. The titanites show a range of zoning patterns, dominated by compositional sector zones. The sector zones are defined by large (order of magnitude) differences in rare earth element (REE) and high field strength element (HFSE) concentrations between titanite grown at different crystal faces. The mechanism responsible for sector zone formation is considered to relate to differences in the surface structure of titanite at different crystal faces. Faces of the forms { 100 } and { 001 } are likely to have surface configurations more amenable for impurity element incorporation than faces of the form { 161 }. This evidence for disequlibirium titanite growth, and the large differences which must exist between effective partition coefficients at different titanite crystal faces, makes models of equilibrium trace element partitioning effectively meaningless. Minor growth zones are also present and relate to subtle differences in the REE composition of the titanite. These variations have been used to construct a model of titanite-fluid REE partitioning which suggests that the HREE have higher effective titanite-fluid partition coefficients than the LREE. In the continental Statfjord Formation (Jurassic, North Viking Graben) authigenic apatite occurs as overgrowths on variably corroded detrital cores. The authigenic apatite is chemically very distinct from the detrital apatite and contains high concentrations of Sr, REE, F, and probable concentrations of C.
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Kolesik, P. "U–Pb geochronology of volcano–sedimentary moraine sediments of the Bunger Hills: implications for Mesoproterozoic evolution of East Antarctica." Thesis, 2016. http://hdl.handle.net/2440/120941.

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The Bunger Hills and adjacent areas of Wilkes Land and Queen Mary Land occupy the very western periphery of the Musgrave–Albany–Fraser Orogen, and represent one of the few exposures within east Antarctica with direct correlations to Australian constituent terrains of this continental-scale system. U–Pb analyses of detrital zircons from volcano–sedimentary moraine sediments of the Bunger Hills yield concordant 206Pb/238U ages ranging from ca. 1364 Ma to ca. 1040 Ma (n = 842), with a main late Mesoproterozoic magmatic zircon population clustered at ca. 1179–1161 Ma. Strong parallels with the time profile of in-situ rocks from the Stage 2 Albany–Fraser Orogen (AFO), the Bunger Hills and Windmill Islands, suggest these were the likely provenances for the associated moraine detritus. The Bunger Hills lie downstream from outcrops of the geographically inaccessible Sandow Group, which comprises clastic and mafic volcanoclastic rocks. It is interpreted that the sedimentary moraine materials of the Bunger Hills were derived from the glacial erosion of the Sandow Group supracrustal successions. The lithological character, sedimentary fill pattern and advanced diagenesis suggest that the Sandow Group formed within an active intra-continental rift-basin and represents the upper-crustal expression of extensional tectonism. Reconnaissance U–Pb geochronology of authigenic titanite suggests basin development occurred close to or within the time frame of the high-grade metamorphism recorded in the Bunger Hills. Therefore basin development was probably directly associated with the second major thermo–tectonic phase of the AFO (Stage 2; ca. 1215–1140 Ma). Due to the essentially non-metamorphosed volcano–sedimentary nature of the detritus in the sedimentary rocks, it seems likely that the evolving Mesoproterozoic orogenic system was not deeply exhumed during basin development.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 2016
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Books on the topic "Authigenic titanite"

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Valentine, Page C. The Gulf of Maine rutile province--accumulation of fine-grained, authigenic titanium oxide from sandstone and shale source rocks. [Denver, Colo.?]: Dept. of Interior, U.S. Geological Survey, 1989.

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A, Commeau Judith, and Geological Survey (U.S.), eds. The Gulf of Maine rutile province--accumulation of fine-grained, authigenic titanium oxide from sandstone and shale source rocks. [Denver, Colo.?]: Dept. of Interior, U.S. Geological Survey, 1989.

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Conference papers on the topic "Authigenic titanite"

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Novoselov, Alexey, Dailto Silva, and Carlos Roberto de Souza Filho. "Authigenic Titanite in Paleosols Indicates Elevated Temperatures and Low Atmospheric CO2 Levels." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1952.

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