西昆仑叶城南部麻扎地区志留纪几丁虫动物群新发现
Discovery of the Silurian chitinozoan fauna in the Mazha area, southern Yecheng, West Kunlun.
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摘要: 西昆仑地区处于中亚腹地的高寒缺氧地带，区域地质研究程度较低。早志留世轻变质碎屑岩地层时代的确定主要依据三叶虫、头足类和珊瑚等大化石，一直没有微体化石方面的证据。最近，在西昆仑地区进行的地质调查中，在温泉沟地区新发现了较丰富的志留纪Desmochitina，Sphaerochitina，Rhabdochitina，Conochitina等属几丁虫化石，为早志留世碎屑岩地层时代的确定、西昆仑地区地质调查工作的开展、志留纪地层的划分对比和西昆仑地区地质演化历史的研究提供了重要微体化石方面的依据。Abstract: The West Kunlun region is situated in a high-altitude cold, oxygen-deficient zone in the interior of Central Asia, where the level of geological research is relatively low. The determination of the stratigraphic age of the Lower Silurian low-grade metamorphic clastic rocks was mainly based on trilobites, corals and cephalopods, but no evidence of microfossils has been found. Recently abundant Silurian chitinozoan fossils of the genera Desmochitina,Sphaerochitina,Rhabdochitina and Conochitinas have been found during geological survey in the Wengquangou area, West Kunlun. This supplies the determination of the age of the Lower Silurian clastic rocks, geological survey in the West Kunlun region, stratigraphic division and correlation of the Silurian and research on the geological evolution in the West Kunlun region with important evidence of microfossil fossils.
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Keywords:
- Silurian /
- chitinozoan fauna /
- new discovery /
- Mazha /
- West Kunlun
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