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Ages and Sources of Sedimentary Rocks of the Lan Terrane in the Mongol-Okhotsk Fold Belt: Results of Zircon U-Pb and Lu-Hf Isotope Studies
Russian Journal of Pacific Geology ( IF 0.9 ) Pub Date : 2020-07-01 , DOI: 10.1134/s1819714020030070 V. A. Zaika , A. A. Sorokin
中文翻译:
蒙古-鄂霍次克褶皱带兰地层沉积岩的年龄和来源:锆石U-Pb和Lu-Hf同位素研究的结果
更新日期:2020-07-01
Russian Journal of Pacific Geology ( IF 0.9 ) Pub Date : 2020-07-01 , DOI: 10.1134/s1819714020030070 V. A. Zaika , A. A. Sorokin
Abstract
The paper presents the results of U-Pb and Lu-Hf isotope studies of detrital zircons from the terrigenous the Lan 410 Ma (Lower Devonian), Terrane in the eastern part of the Mongol-Okhotsk fold belt. The lower age rocks limits are for the Nivakh formation ~ for the Verkholan series ~332 Ma (Mississippian), for the Ugokhan series ~239 Ma (Middle Triassic). The evidences were obtained for the Lower Triassic (or Middle-Late Triassic) age of the sediments assigned to the Ugokhan series previously classified as Upper Paleozoic. These data indicate that the Lower Mesozoic sedimentary complexes in the structure of this belt are developed much wider than is currently believed. The main sources of clastic material for the Devonian, Carboniferous, and Triassic sedimentary rocks of the Lan terrane were mainly igneous and metamorphic complexes of the North Asian craton framing, along with island arcs. The Lan Terrane can be considered as a fragment of the accretionary complex formed in front of the southeastern margin of the North Asian craton.中文翻译:
蒙古-鄂霍次克褶皱带兰地层沉积岩的年龄和来源:锆石U-Pb和Lu-Hf同位素研究的结果