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The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam.

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Title: The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam.
Authors: Vladimirov, A. G.1,2,3 (AUTHOR) vladimir@igm.nsc.ru, Phan, L. A.4 (AUTHOR) luuanh-phan@yahoo.com, Travin, A. V.1,2,3 (AUTHOR), Mikheev, E. I.1,2 (AUTHOR), Murzintsev, N. G.2 (AUTHOR), Annikova, I. Yu.1,2,3 (AUTHOR)
Source: Russian Journal of Pacific Geology. Jul2020, Vol. 14 Issue 4, p305-325. 21p.
Subject Terms: *Geology, *Magmatism, *Plate tectonics, *Andesite, *Breccia
Geographic Terms: Vietnam
Abstract: Geological, mineralogical–petrographic, and geochronological studies (U/Pb, Rb/Sr, and Ar/Ar isotope dating) of igneous complexes of the Dalat Zone identified two stages, which reflect a change in the geodynamic regime. The first, Late Jurassic, stage corresponded to a suprasubduction setting with formation of volcanic sequences of the Deobaoloc complex: calc-alkali basaltic andesites, andesites, dacites, their tuff breccias, and tuffs. The second, Albian–Coniacian, stage of the transform setting was related to a sliding zone of tectonic plates, activation of general left-lateral shear deformations at the continent–ocean boundary, and formation of paleovolcanic structures and related Dinhquan granitic batholiths (113 ± 0.6 Ma), Ancroet granites (97 ± 0.4 Ma), Deoca monzogranodiorites (90.4 ± 0.3 Ma), and Cana leucogranite–alaskites (86.8 ± 1.5 Ma). The thermochronological analysis and mathematical modeling indicate that the live period of parental granitic magma in a transform geodynamic setting was Δt of ~27 Ma and differentiation in the deep source resulted in origination of the final Cana leucogranite-alaskitic intrusive stocks with Au–Mo ± Cu mineralization. [ABSTRACT FROM AUTHOR]
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  Label: Title
  Group: Ti
  Data: The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam.
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  Data: <searchLink fieldCode="AR" term="%22Vladimirov%2C+A%2E+G%2E%22">Vladimirov, A. G.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<i> vladimir@igm.nsc.ru</i><br /><searchLink fieldCode="AR" term="%22Phan%2C+L%2E+A%2E%22">Phan, L. A.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> luuanh-phan@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Travin%2C+A%2E+V%2E%22">Travin, A. V.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mikheev%2C+E%2E+I%2E%22">Mikheev, E. I.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Murzintsev%2C+N%2E+G%2E%22">Murzintsev, N. G.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Annikova%2C+I%2E+Yu%2E%22">Annikova, I. Yu.</searchLink><relatesTo>1,2,3</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Russian+Journal+of+Pacific+Geology%22">Russian Journal of Pacific Geology</searchLink>. Jul2020, Vol. 14 Issue 4, p305-325. 21p.
– Name: Subject
  Label: Subject Terms
  Group: Su
  Data: *<searchLink fieldCode="DE" term="%22Geology%22">Geology</searchLink><br />*<searchLink fieldCode="DE" term="%22Magmatism%22">Magmatism</searchLink><br />*<searchLink fieldCode="DE" term="%22Plate+tectonics%22">Plate tectonics</searchLink><br />*<searchLink fieldCode="DE" term="%22Andesite%22">Andesite</searchLink><br />*<searchLink fieldCode="DE" term="%22Breccia%22">Breccia</searchLink>
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  Data: <searchLink fieldCode="DE" term="%22Vietnam%22">Vietnam</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Geological, mineralogical–petrographic, and geochronological studies (U/Pb, Rb/Sr, and Ar/Ar isotope dating) of igneous complexes of the Dalat Zone identified two stages, which reflect a change in the geodynamic regime. The first, Late Jurassic, stage corresponded to a suprasubduction setting with formation of volcanic sequences of the Deobaoloc complex: calc-alkali basaltic andesites, andesites, dacites, their tuff breccias, and tuffs. The second, Albian–Coniacian, stage of the transform setting was related to a sliding zone of tectonic plates, activation of general left-lateral shear deformations at the continent–ocean boundary, and formation of paleovolcanic structures and related Dinhquan granitic batholiths (113 ± 0.6 Ma), Ancroet granites (97 ± 0.4 Ma), Deoca monzogranodiorites (90.4 ± 0.3 Ma), and Cana leucogranite–alaskites (86.8 ± 1.5 Ma). The thermochronological analysis and mathematical modeling indicate that the live period of parental granitic magma in a transform geodynamic setting was Δt of ~27 Ma and differentiation in the deep source resulted in origination of the final Cana leucogranite-alaskitic intrusive stocks with Au–Mo ± Cu mineralization. [ABSTRACT FROM AUTHOR]
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        Value: 10.1134/S1819714020040065
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      – Code: eng
        Text: English
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        PageCount: 21
        StartPage: 305
    Subjects:
      – SubjectFull: Geology
        Type: general
      – SubjectFull: Magmatism
        Type: general
      – SubjectFull: Plate tectonics
        Type: general
      – SubjectFull: Andesite
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      – SubjectFull: Breccia
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      – SubjectFull: Vietnam
        Type: general
    Titles:
      – TitleFull: The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam.
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            NameFull: Vladimirov, A. G.
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            NameFull: Phan, L. A.
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            NameFull: Travin, A. V.
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            NameFull: Murzintsev, N. G.
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            NameFull: Annikova, I. Yu.
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            – D: 01
              M: 07
              Text: Jul2020
              Type: published
              Y: 2020
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            – TitleFull: Russian Journal of Pacific Geology
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