Journal articles on the topic 'Geochemistry, Structural Geology, Geothermobarometry, Geochronology'

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1

RICE, A. H. N., T. NTAFLOS, R. A. GAYER, and R. D. BECKINSALE. "Metadolerite geochronology and dolerite geochemistry from East Finnmark, northern Scandinavian Caledonides." Geological Magazine 141, no. 3 (2004): 301–18. http://dx.doi.org/10.1017/s001675680300788x.

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Dolerite dykes in the East Finnmark Scandinavian Caledonides form three geochemical suites: Digermulhalvøya–Magerøya – WNW–ESE-trending, c. 337–332 Ma, possibly also c. 293 Ma, continental within-plate; East Varangerhalvøya – NE–SW and N–S, c. 376 Ma, continental plate-margin; Styret – NE–SW, also c. 376 Ma, chemically intermediate to the other two groups. New K–Ar data from metadolerites on Varangerhalvøya give a 7-point ‘lower envelope’ isochron of 577 ± 14 Ma (MSWD 1.04). This is concordant with a published upper intercept U–Pb zircon age (567+30−23 Ma) from an East Varangerhalvøya dolerite
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2

Culí, Laura, Jesús Solé, Marc Campeny, and Jeffry A. G. Oalmann. "High-Temperature Metamorphic Garnets from Grenvillian Granulites of Southwestern Oaxacan Complex (Southern Mexico): Petrology, Geochemistry, Geothermobarometry, and Tectonic Implications." Minerals 11, no. 8 (2021): 805. http://dx.doi.org/10.3390/min11080805.

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The basement of eastern Mexico comprises Grenvillian-age granulite-facies metamorphic rocks. The Oaxacan Complex represents the largest outcrop belt of this basement in Mexico. In this work, southwestern Oaxacan Complex garnets are studied from a petrographical, geochemical, and geothermobarometrical perspective for the first time. The studied garnets display different grain sizes nucleated in a polyphase evolution. The almandine end member proportion is similar in all of the studied lithotypes. The highest pyrope concentrations are found in Qz Fsp paragenesis and ultramafic rocks and the lowe
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3

BAKKER, H. E., K. DE JONG, H. HELMERS, and C. BIERMANN. "The geodynamic evolution of the Internal Zone of the Betic Cordilleras (south-east Spain): a model based on structural analysis and geothermobarometry." Journal of Metamorphic Geology 7, no. 3 (1989): 359–81. http://dx.doi.org/10.1111/j.1525-1314.1989.tb00603.x.

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4

Putiš, Marián, Ondrej Nemec, Martin Danišík, et al. "Formation of a Composite Albian–Eocene Orogenic Wedge in the Inner Western Carpathians: P–T Estimates and 40Ar/39Ar Geochronology from Structural Units." Minerals 11, no. 9 (2021): 988. http://dx.doi.org/10.3390/min11090988.

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The composite Albian–Eocene orogenic wedge of the northern part of the Inner Western Carpathians (IWC) comprises the European Variscan basement with the Upper Carboniferous–Triassic cover and the Jurassic to Upper Cretaceous sedimentary successions of a large oceanic–continental Atlantic (Alpine) Tethys basin system. This paper presents an updated evolutionary model for principal structural units of the orogenic wedge (i.e., Fatricum, Tatricum and Infratatricum) based on new and published white mica 40Ar/39Ar geochronology and P–T estimates by Perple_X modeling and geothermobarometry. The nort
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5

Yang, Fan, Jinggui Sun, Yan Wang, et al. "Geology, Geochronology and Geochemistry of Weilasituo Sn-Polymetallic Deposit in Inner Mongolia, China." Minerals 9, no. 2 (2019): 104. http://dx.doi.org/10.3390/min9020104.

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The recently discovered Weilasituo Sn-polymetallic deposit in the Great Xing’an Range is an ultralarge porphyry-type deposit. The mineralization is closely associated with an Early Cretaceous quartz porphyry. Analysis of quartz porphyry samples, including zircon U-Pb dating and Hf isotopies, geochemical and molybdenite Re-Os isotopic testing, reveals a zircon U-Pb age of 138.6 ± 1.1 Ma and a molybdenite Re-Os isotopic age of 135 ± 7 Ma, suggesting the concurrence of the petrogenetic and metallogenic processes. The quartz porphyry has high concentrations of SiO2 (71.57 wt %–78.60 wt %), Al2O3 (
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6

Naha, K., R. Srinivasan, K. Gopalan, M. V. Subba Rao, and G. V. C. Pantulu. "Evolution of early precambrian Peninsular Gneissic Complex, Dharwar craton, India: Structural history and Rb-Sr geochronology." Chemical Geology 70, no. 1-2 (1988): 144. http://dx.doi.org/10.1016/0009-2541(88)90615-8.

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7

Zhang, Xinming, Da Zhang, Minfeng Bi, et al. "Genesis and geodynamic setting of the Nanyangtian tungsten deposit, SW China: Constraints from structural deformation, geochronology, and S–O isotope data." Ore Geology Reviews 138 (November 2021): 104354. http://dx.doi.org/10.1016/j.oregeorev.2021.104354.

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8

Xin, D., T. N. Yang, M. J. Liang, et al. "Syn-subduction crustal shortening produced a magmatic flare-up in middle Sanjiang orogenic belt, southeastern Tibet Plateau: Evidence from geochronology, geochemistry, and structural geology." Gondwana Research 62 (October 2018): 93–111. http://dx.doi.org/10.1016/j.gr.2018.03.009.

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9

Martini, Amós, Maria de Fátima Bitencourt, Lauro V. S. Nardi, and Luana Moreira Florisbal. "An integrated approach to the late stages of Neoproterozoic post-collisional magmatism from Southern Brazil: Structural geology, geochemistry and geochronology of the Corre-mar Granite." Precambrian Research 261 (May 2015): 25–39. http://dx.doi.org/10.1016/j.precamres.2015.01.011.

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10

Wang, J. M., J. J. Zhang, and X. X. Wang. "Structural kinematics, metamorphic P-T profiles and zircon geochronology across the Greater Himalayan Crystalline Complex in south-central Tibet: implication for a revised channel flow." Journal of Metamorphic Geology 31, no. 6 (2013): 607–28. http://dx.doi.org/10.1111/jmg.12036.

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11

Hanyu, Takeshi, Kevin T. M. Johnson, Naoto Hirano, and Zhong-Yuan Ren. "Noble gas and geochronology study of the Hana Ridge, Haleakala volcano, Hawaii; implications to the temporal change of magma source and the structural evolution of the submarine ridge." Chemical Geology 238, no. 1-2 (2007): 1–18. http://dx.doi.org/10.1016/j.chemgeo.2006.09.008.

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12

Ludden, John, and Andrew Hynes. "The Abitibi-Grenville Lithoprobe transect part III: introduction." Canadian Journal of Earth Sciences 37, no. 2-3 (2000): 115–16. http://dx.doi.org/10.1139/e00-016.

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This is the third and final compendium of papers on the Abitibi-Grenville Lithoprobe transect. Much of the focus is on the Grenville Province, complementing the previous compendia which focussed on the Abitibi subprovince. There are, however, papers on the Abitibi subprovince concerning detailed gravity studies, granitoid geochemistry, and fluid evolution. The evolution of the Grenvillian orogen is examined in a series of papers combining observations from seismic studies, isotopic characteristics, geochronology, petrology, and structural geology. There are papers discussing the heat flux, tel
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13

Baird, Graham B. "Late Ottawan orogenic collapse of the Adirondacks in the Grenville province of New York State (USA): Integrated petrologic, geochronologic, and structural analysis of the Diana Complex in the southern Carthage-Colton mylonite zone." Geosphere 16, no. 3 (2020): 844–74. http://dx.doi.org/10.1130/ges02155.1.

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Abstract Crustal-scale shear zones can be highly important but complicated orogenic structures, therefore they must be studied in detail along their entire length. The Carthage-Colton mylonite zone (CCMZ) is one such shear zone in the northwestern Adirondacks of northern New York State (USA), part of the Mesoproterozoic Grenville province. The southern CCMZ is contained within the Diana Complex, and geochemistry and U-Pb zircon geochronology demonstrate that the Diana Complex is expansive and collectively crystallized at 1164.3 ± 6.2 Ma. Major ductile structures within the CCMZ and Diana Compl
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14

Muhtar, M. N., Chang-Zhi Wu, M. Santosh, et al. "Late Paleozoic tectonic transition from subduction to post-collisional extension in Eastern Tianshan, Central Asian Orogenic Belt." GSA Bulletin 132, no. 7-8 (2019): 1756–74. http://dx.doi.org/10.1130/b35432.1.

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Abstract Late Paleozoic large-scale transcurrent tectonics and synkinematic intrusions are prominent features in the Eastern Tianshan segment of the southwestern Central Asian Orogenic Belt. However, the spatial and temporal relationship between synkinematic intrusions and crustal-scale shear zones remains unclear. Here we report petrology, geochemistry, and geochronology of the Qiziltag pluton associated with the Kanggur-Huangshan Shear Zone (KHSZ) with a view to characterize the spatial and temporal relationship between synkinematic intrusions and large-scale transcurrent shearing. Field rel
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15

Faber, Carly, Holger Stünitz, Deta Gasser, et al. "Anticlockwise metamorphic pressure–temperature paths and nappe stacking in the Reisa Nappe Complex in the Scandinavian Caledonides, northern Norway: evidence for weakening of lower continental crust before and during continental collision." Solid Earth 10, no. 1 (2019): 117–48. http://dx.doi.org/10.5194/se-10-117-2019.

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Abstract. This study investigates the tectonostratigraphy and metamorphic and tectonic evolution of the Caledonian Reisa Nappe Complex (RNC; from bottom to top: Vaddas, Kåfjord, and Nordmannvik nappes) in northern Troms, Norway. Structural data, phase equilibrium modelling, and U-Pb zircon and titanite geochronology are used to constrain the timing and pressure–temperature (P–T) conditions of deformation and metamorphism during nappe stacking that facilitated crustal thickening during continental collision. Five samples taken from different parts of the RNC reveal an anticlockwise P–T path att
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16

Huong, Tran Thi, and Nguyen Hoang. "Petrology, geochemistry, and Sr, Nd isotopes of mantle xenolith in Nghia Dan alkaline basalt (West Nghe An): implications for lithospheric mantle characteristics beneath the region." VIETNAM JOURNAL OF EARTH SCIENCES 40, no. 3 (2018): 207–27. http://dx.doi.org/10.15625/0866-7187/40/3/12614.

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Study of petrological and geochemical characteristics of mantle peridotite xenoliths in Pliocene alkaline basalt in Nghia Dan (West Nghe An) was carried out. Rock-forming clinopyroxenes, the major trace element containers, were separated from the xenoliths to analyze for major, trace element and Sr-Nd isotopic compositions. The data were interpreted for source geochemical characteristics and geodynamic processes of the lithospheric mantle beneath the region. The peridotite xenoliths being mostly spinel-lherzolites in composition, are residual entities having been produced following partial mel
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17

González Clavijo, Emilio, Ícaro Dias da Silva, José R. Martínez Catalán, et al. "A tectonic carpet of Variscan flysch at the base of a rootless accretionary prism in northwestern Iberia: U–Pb zircon age constrains from sediments and volcanic olistoliths." Solid Earth 12, no. 4 (2021): 835–67. http://dx.doi.org/10.5194/se-12-835-2021.

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Abstract. The allochthonous complexes of Galicia–Trás-os-Montes Zone (NW Iberia) are part of a rootless tectonic stack which preserves part of a Variscan accretionary prism. They are formed by individual tectonic slices marked by specific tectonometamorphic evolutions, which were piled up in a piggy-back mode onto its relative autochthon, the Central Iberian Zone (CIZ). Allochthony decreases from the structurally upper thrust sheets towards the lower ones. The lowermost unit of the stack is known as the Parautochthon or Schistose Domain. It is characterized by a low metamorphic grade in contra
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18

Zhang, Qian W. L., Jia-Hui Liu, Zhen M. G. Li, Meng-Yan Shi, Yi-Chao Chen, and Chun-Ming Wu. "Juxtaposition of diverse, subduction-related tectonic blocks with contrasting metamorphic features and ages in the Paleoproterozoic Aketashitage orogen, NW China: Implications for Precambrian orogeny." GSA Bulletin, December 1, 2020. http://dx.doi.org/10.1130/b35766.1.

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The comprehensive investigation of orogenic-related litho-structural assemblages, metamorphism, and geochronology in early Precambrian orogens can help us better understand the features of plate tectonics in early Earth. The Paleoproterozoic Aketashitage orogenic belt is located at a key position in northwestern China and connects the North China craton, Tarim craton, Altaids orogen, and Tethys orogen. Garnet-bearing mafic and paragneissic granulite occur as interlayers or blocks preserved within paragneissic matrix, and two to three generations of metamorphic mineral assemblages were identifi
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19

Prudente de Melo, Rodrigo, Marcos Aurélio Farias de Oliveira, Richard J. Goldfarb, et al. "Early Neoproterozoic Gold Deposits of the Alto Guaporé Province, Southwestern Amazon Craton, Western Brazil." Economic Geology, August 9, 2021. http://dx.doi.org/10.5382/econgeo.4852.

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Abstract The Alto Guaporé gold province, southwestern Amazon craton, contains gold deposits that have been mined since the beginning of the 18th century and these deposits, together, have modern-day, pre-mining gold resources of at least 1.8 Moz. The ore is associated with quartz vein systems along the southeastern part of the Aguapei belt, a ~35 km wide and ~500 km long, NNW-trending shear zone formed due to reactivation of a terrane-bounding suture. The Aguapei belt evolved by ca. 1150–1100 Ma rifting and deposition of siliciclastic sediments in an aulacogen basin, followed by deformation an
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