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| 桐柏蔡家凹岩片内寒武纪高肌虫的发现及其地质意义 | |
| 引用本文： | 张仁杰,舒德干.桐柏蔡家凹岩片内寒武纪高肌虫的发现及其地质意义[J].地质论评,2000,46(3):225-234. |
| 作者姓名： | 张仁杰 舒德干 |
| 作者单位： | 1. 中国地质调查局宜昌地质矿产研究所,443003 2. 西北大学地质系,西安,710069 3. 云南地质矿产局,昆明,650011 |
| 基金项目： | 中国地质科学院资助项目，， |
| 摘 要： | 本文描述了河南桐柏西北部蔡家凹大理岩岩丰富的高肌虫化石Ｔｏｎｇｂａｉｅｌｌａ ｘｉｎｊｉｅｎｓｉｓ ｇｅｎ．ｅｔ ｓｐ．ｎｏｖ．、Ｘｉａｎｚｈｅｅｌｌａ ｈｅｎａｎｅｎｓｉｓ ｓｐ．ｎｏｖ．和Ｍｏｎｏｎｏｔｅｌｌａ ｃｆ．ｃｈｕａｎｓｈａｎｅｎｓｉｓ Ｈｕｏ ｅｔＳｈｕ及小壳化石Ｃｏｎｏｔｈｅｃａ ｓｐ．共有４属４种。据此确定含化石地层为寒武系，属浅海沉积环境。该生物群的发现为解决桐柏大别造山带与 |
| 关 键 词： | 高肌虫 寒武系 桐柏－大别造山带 地质意义 |
Cambrian Bradoriids from Caijia'ao Marble Body, Tongbai,Henan and Their Geological Significance |
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| Zhang Renjie,Shu Degan,Jiang Zhiwen,Yao Huazhou.Cambrian Bradoriids from Caijia'ao Marble Body, Tongbai,Henan and Their Geological Significance[J].Geological Review,2000,46(3):225-234. | |
| Authors: | Zhang Renjie Shu Degan Jiang Zhiwen Yao Huazhou |
| Abstract: | Caijia'ao marble body is a upper superimposed on the Guozhuang litho-formation of Lower Proterozoic, and bounded by the Haohanpo ductile-shear zone and Songpa ductile fracture. That marble body may originally be a part of the Cambrian Liushanyan litho-formation, according to the results of 1 : 50000 reginal geological survey in the Tongbai area. However, the Caijiawa marble was placed into the Proterozoic Yindonggou Formation of the Maojie Group, or into the Cambrian Dahe Formation, and correlated with the Yanlinggou Formation of the Qingling Group by previous researchers. That marble, about 30 km long and 50-1000 m wide, crops out about 15 km away from northwest Tongbai. It consists of serpentinous olivine marable, dolomite marble, dolomitic marble, graphite marble, and marble intercalated with plagioclase hornblende schist. Fairly abundant bradoriids including Tongbaiella xinjiensis (gen. et sp. nov. ), Xi-angzeella henanensis (sp. nov. ), and Mononotella cf. chuanshanensis, a few small shelly fossils Conotheca sp. , and some spherical fossils have been found from the crystalline limestone lens in the Caijiawa marble, Xiemaling Hill, Laoheshangmao Hill and Wawuzhuang Village, Tongbai County. Those fossils the Cambrian (most possibly Early Cambrian) in age. This is the only locality of Cambrian rocks with sufficient paleontological evidence in the Tongbai-Dabie orogenic belt (Henan part). Bradoriids of Caijiawa marble such as Xiangzheella and Mononotella chuang-shanensis are the very common members of contemporaneous bradoriids of the South China region. Among them, Xiangzheella was found in the Yangtze biogeographic and Jiannan Provinces; while Mononotella in the western part of the Yangtze biogeographic province. Furthermore, Conotheca came from the South China biogeographic province of small shelly fossils. |
| Keywords: | bradoriids Cambrian Tongbai-Dabie orogenic belt Tongbai |
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