Инд. авторы: | Vladimirov A.G., Phan L.A., Travin A.V., Mikheev E.I., Murzintsev N.G., Annikova I.Y. |
Заглавие: | The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam |
Библ. ссылка: | Vladimirov A.G., Phan L.A., Travin A.V., Mikheev E.I., Murzintsev N.G., Annikova I.Y. The Geology and Thermochronology of Cretaceous Magmatism of Southeastern Vietnam // Russian Journal of Pacific Geology. - 2020. - Vol.14. - Iss. 4. - P.305-325. - ISSN 1819-7140. - EISSN 1819-7159. |
Внешние системы: | DOI: 10.1134/S1819714020040065; WoS: 000557007800002; |
Реферат: | eng: 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 Delta tof similar to 27 Ma and differentiation in the deep source resulted in origination of the final Cana leucogranite-alaskitic intrusive stocks with Au-Mo +/- Cu mineralization.
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Ключевые слова: | MASSIF; PROVINCE; TEMPERATURE; CONSTRAINTS; PETROGENESIS; GRANITOIDS; SOUTHERN VIETNAM; DALAT ZONE; southeastern Vietnam; Dalat Zone; mathematic modeling; thermchronology; suprasubduction and transform geodynamic settings; U/Pb, Rb/Sr, Ar/Ar isotope dating; calc-alkali and subalkali granitoids; AGE; |
Издано: | 2020 |
Физ. характеристика: | с.305-325 |