Discovery of late Paleozoic fossils in tectonic blocks of the Dabao Formation in the South Qinling Orogenic Belt and their significance  

作　　者：WANG Tao WANG ZongQi YAN Zhen YAN QuanRen ZHANG YingLi XIANG ZhongJin 

机构地区：[1]Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China [2]Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China

出　　处：《Science China Earth Sciences》2011年第7期975-981,共7页中国科学（地球科学英文版）

基　　金：supported by National Natural Science Foundation of China (Grant Nos. 40602026, 40772137);the Basic Outlay of Scientific Research Work from the Ministry of Science and Technology of China (Grant No. J0720);Key Projects in the National Science & Technology Pillar Program in the Eleventh Five-year Plan Period (Grant No. 2006BAB01A11);the Geological Survey Project of China (Grant No. 1212010611807)

摘　　要：The Dabao Formation in the South Qinling Orogenic Belt was previously regarded as Ordovician in age and consists of clastic matrix and blocks of siltstone,limestone,chert,and volcanic rocks.However,some Middle Devonian corals,conodonts,and other fossil fragments within the limestone blocks were discovered in recent field investigations,indicating that the Dabao Formation was formed during late Paleozoic.Combined with other regional geological data,the Dabao Formation in the Southern Qinling Orogenic Belt is considered to be a late Paleozoic or early Mesozoic accretionary complex.The Dabao Formation in the South Qinling Orogenic Belt was previously regarded as Ordovician in age and consists of clastic matrix and blocks of siltstone, limestone, chert, and volcanic rocks. However, some Middle Devonian corals, conodonts, and other fossil fragments within the limestone blocks were discovered in recent field investigations, indicating that the Dabao Formation was formed during late Paleozoic. Combined with other regional geological data, the Dabao Formation in the Southern Qinling Orogenic Belt is considered to be a late Paleozoic or early Mesozoic accretionary complex.

关 键 词：South Qinling Orogenic Belt Dabao Formation Middle Devonian corals and conodonts 

分 类 号：P542.2[天文地球—构造地质学] P618.110.2[天文地球—地质学]