| 秦岭造山带主要疑难地层时代研究的新进展 |
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| 关键词:Qinling doubtful strata micro-fossils |
| 基金项目:国家科技支撑项目(2006BAB01A11),中国地质调查局地质调查项目(1212010611807)联合资助 |
| 作者 | 单位 | E-mail | | 王宗起 | 中国地质科学院矿产资源研究所, 北京 100037 | wzq@ccsd.org.cn | | 闫臻 | 中国地质科学院地质研究所, 北京 100037 | | | 王涛 | 中国地质科学院地质研究所, 北京 100037 | | | 高联达 | 中国地质科学院地质研究所, 北京 100037 | | | 闫全人 | 中国地质科学院地质研究所, 北京 100037 | | | 陈隽璐 | 中国地质调查局西安地调中心, 陕西西安 710054 | | | 李秋根 | 北京大学地球与空间科学院, 北京 100871 | | | 姜春发 | 中国地质科学院地质研究所, 北京 100037 | | | 刘平 | 中国地质科学院地质研究所, 北京 100037 | | | 张英利 | 中国地质科学院矿产资源研究所, 北京 100037 | | | 谢春林 | 中国地质调查局西安地调中心, 陕西西安 710054 | | | 向忠金 | 中国地质科学院地质研究所, 北京 100037 | |
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| New Advances in the Study on Ages of Metamorphic Strata in the Qinling Orogenic Belt |
| Many micro-fossils and chronologic data were obtained in the metamorphic strata of the Qinling Orogenic Belt through palaeontologic, chronologic and structural studies in recent geological survey. Ordovician fossils were found in the Kuanping and Taowan Groups in North Qinling; Carboniferous fossils were found in the Yaolinghe and Yunxi Groups (formerly assigned to Late Proterizoic) and their isotopic ages were determined; Devonian fossils were also found in the Sanhuashi and Bikou Groups (formerly assigned to Late Proterozoic) and Donghe Group (formerly assigned to Early Paleozoic) in South Qinling. An accretionary complex belt was determined, and it is composed of Silurian strata and its Lower Paleozoic concomitant strata north of the Mianxian-Lueyang-Yangxian-Shiquan-Ankang fault in South Qinling. The final formation age of this belt was deduced to be Late Permian or Early Triassic by new findings of fossils and dating of debris zircon in matrices made up of turbidites. |
| WANG Zong-qi,YAN Zhen,WANG Tao,GAO Lian-da,YAN Quan-ren,CHEN Jun-lu,LI Qiu-gen,JIANG Chun-fa,LIU Ping,ZHANG Ying-li,XIE Chun-lin,XIANG Zhong-jin.2009.New Advances in the Study on Ages of Metamorphic Strata in the Qinling Orogenic Belt[J].Acta Geoscientica Sinica,30(5):561-570. |
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