First record of Late Pennsylvanian fusulinids from the North Tianshan belt, NW China
First record of Late Pennsylvanian fusulinids from the North Tianshan belt, NW China
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DOI：
10.1002/gj.4307
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发表时间：
2021-11
影响因子：
1.8
通讯作者：
Xing Huang;Yue Wang;K. Ueno;Xionghua Zhang;S. Jin;Jitao Chen
中科院分区：
文献类型：
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作者：
Xing Huang;Yue Wang;K. Ueno;Xionghua Zhang;S. Jin;Jitao Chen
本文首次报道了中国东天山七峨山组中一个重要的晚宾夕法尼亚世（Pennsylvania）类动物群。在3个主要露头剖面上，共鉴定出6属19种，并对其中的几个指标类群进行了详细描述。现今的类化石时代归属于Kasimovian中期至Gzhelian早期，代表了新疆北方迄今为止最年轻的类化石，从而将其鹅额山组的时代限定在Gzhelian早期。在古生物地理上，东天山的类动物群与中亚的类动物群（如，由于有共同的、特别是特有的物种，因此与东欧地台乌拉尔省的物种保持着交流。特征种包括Montiparus ex gr. sinuosus alaicus、Rauserites rossicus、Schwageriniformis fusiformis、Triticites acutus、Triticites arcticus和Triticites arcticus cybaeus。这种古生物地理上的亲缘关系表明，北天山洋的闭合时间晚于早格热期，南乌拉尔和西部古特提斯在这一时期有共同的类动物群。
A noteworthy late Pennsylvanian fusulinid fauna is for the first time reported from the Qi'eshan Formation in the Eastern Tianshan, NW China. From three main outcrop sections, 19 species of six genera are identified and illustrated, among which several index taxa are described in detail. The present fusulinids are assigned to the middle Kasimovian to early Gzhelian in age, representing the youngest fusulinid fauna in northern Xinjiang up to now, which constrains the age of the Qi'eshan Formation up to the early Gzhelian. Palaeobiogeographically, the fusulinid fauna in the Eastern Tianshan was closely related to the populations from Central Asia (e.g., southern Fergana, the Alay Mountains and Darvaz) of the western Palaeotethyan Subprovince, and kept exchanging with those from the Eastern European Platform of Ural Province, given the common, particularly endemic species. The characteristic species include Montiparus ex gr. sinuosus alaicus, Rauserites rossicus, Schwageriniformis fusiformis, Triticites acutus, Triticites arcticus, and Triticites arcticus cybaeus. This palaeobiogeographic affinity suggests that the close of timing of the North Tianshan Ocean was later than the Early Gzhelian, and that the southern Urals and western Palaeotethys shared a common fusulinid fauna during this period.