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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2017.1
- 수록면
- 667 - 682 (16page)
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초록· 키워드
오류제보하기
The Mingshui and Shuangjingzi granitic plutons are exposed in the northern Beishan area, in the southern Central Asia Orogenic Belt. U-Pb zircon dating indicates that Mingshui secondary intrusive lithosfacies and Shuangjingzi quartz monzodiorite formed at 328 ± 2 Ma and 272 ± 2 Ma, respectively. The former is composed of grey white monzogranites and potassic altered flesh red monzogranites. Geochemistry indicates they are calc-alkaline I-type granites. Shuangjingzi granites are mainly composed of unfractionated calc-alkaline I-type quartz monzodiorite, granodiorite and monzogranite. The Mingshui grey white monzogranites with negative initial εNd (–2.0 to –1.7) and moderate initial 87Sr/86Sr values (0.706740 to 0.710092) were probably derived from mixing of the depleted mantle (juvenile) component and the Palaeoproterozoic–Archean crust (or sedimentary) component and represent volcanic arc granites. The Shuangjingzi quartz monzodiorites are most likely derived from mafic to intermediate igneous protolith and represent post-collisional granites. This work, combined with the regional geology, suggests the Palaeo-Asian Ocean closed between 328 Ma and 272 Ma in the northern Beishan area.
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참고문헌 (124)
참고문헌 신청
Allen, M. B. / 1995 / Junggar, Turfan and Alakol Basins as Late Permian to Early Triassic extensional structures in a sinistral shear zone in the Altaid Orogenic Collage, Central-Asia / Journal of the Geological Society 152:327~338
Altherr, R. / 2000 / High-potassium, calc-alkaline I-type plutonism in the European Variscides: Northern Vosges (France) and northern Schwarzwald (Germany) / Lithos 50:51~73
Ao, S. J. / 2012 / Cambrian to early Silurian ophiolite and accretionary processes in the Beishan collage, NW China: implications for the architecture of the Southern Altaids / Geological Magazine 149:606~625
Ao, S. / 2016 / Paleozoic accretionary orogenesis in the eastern Beishan orogen: Constraints from zircon U-Pb and 40Ar/39Ar geochronology / Gondwana Research 18:224~235
Belousova, E. / 2002 / Igneous zircon:trace element composition as an indicator of source rock type / Contributions to Mineralogy and Petrology 143:602~622
Altherr, R. / 2000 / High-potassium, calc-alkaline I-type plutonism in the European Variscides: Northern Vosges (France) and northern Schwarzwald (Germany) / Lithos 50:51~73
Ao, S. J. / 2012 / Cambrian to early Silurian ophiolite and accretionary processes in the Beishan collage, NW China: implications for the architecture of the Southern Altaids / Geological Magazine 149:606~625
Ao, S. / 2016 / Paleozoic accretionary orogenesis in the eastern Beishan orogen: Constraints from zircon U-Pb and 40Ar/39Ar geochronology / Gondwana Research 18:224~235
Belousova, E. / 2002 / Igneous zircon:trace element composition as an indicator of source rock type / Contributions to Mineralogy and Petrology 143:602~622
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