Chemostratigraphy of the Vendian–Cambrian carbonate sedimentary cover of the Tuva-Mongolian microcontinent
Chemostratigraphy of the Vendian–Cambrian carbonate sedimentary cover of the Tuva-Mongolian microcontinent
复制标题
图瓦-蒙古微大陆文第-寒武纪碳酸盐沉积盖层的化学地层学
DOI：
10.1016/j.rgg.2013.04.008
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发表时间：
2013
影响因子：
1.1
通讯作者：
E. Letnikova
中科院分区：
文献类型：
--
作者：
I. Vishnevskaya;E. Letnikova
利用Sr、C同位素化学地层学对图瓦—蒙古微大陆文甸—寒武系陆架碳酸盐岩沉积物进行了年代测定。sr同位素特征（0.70725 ~ 0.70873）和δ13C变化（+10.5 ~ -3.5‰），并与西伯利亚、非洲、中亚、澳大利亚、南美和斯皮次卑尔根关键剖面资料对比，表明图瓦-蒙古微大陆的碳酸盐岩沉积盖层在600 ~ 520 Ma之间积累，乌格河附近的木仁组和博克逊群的碳酸盐岩沉积最古老。它们的沉积是在马里诺全球冰期之后形成的。
The carbonate sediments from the Vendian–Cambrian shelf of the Tuva-Mongolian microcontinent were dated by Sr and C isotope chemostratigraphy. Analysis of the Sr-isotopic characteristics (0.70725–0.70873) and δ13C variations (+10.5 to –3.5‰), as well as their comparison with the data on the key sections of Siberia, Africa, Central Asia, Australia, South America, and Spitsbergen, showed that the carbonate sedimentary cover of the Tuva-Mongolian microcontinent accumulated at 600–520 Ma and the carbonate sediments of the Muren Formation and the basal beds of the Bokson Group near the Ukha-Gol River are the oldest. Their sedimentation followed the Marinoan global glaciation.