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.
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)
