Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Geologica Sinica》 2018-06
Add to Favorite Get Latest Update

The Determination of Late Paleozoic Volcanic and Sedimentary Substances in the Hinterland of Wudang Mountain,South Qinling Orogeny: Evidence from Microfossil and Zircon Geochronology

WANG Gang;WANG Zongqi;WU Yudong;WANG Dongsheng;WANG Tao;WANG Jiawei;ZHANG Hang;MLR Key Laboratory of Metallogeny and Mineral Assessment,Institute of Mineral Resources,CAGS;Institute of Geolgoy,CAGS;  
It is traditionally regarded that the Wudang Mountain is the Precambrian basement of South Qinling Orogeny and mainly composed of Neoproterozoic Wudang Group,Yaolinghe Group,regionally developed Doushantuo Formation.Field investigation indicates that the rock unit of the Huanglong-Fangtan area,which is different from widely distributed Precambrian orderly sequence,has the typical feature of"block in matrix"structure.Further study of microfossil and zircon isotopic geochronology indicates that the meta-quartz sandstone of formerly determined Doushantuo Formation occurs as slate,from which 15 species and more than 30 kinds of late Devonian sporopollen fossils were separated and identified.Tuffaceous sandstone,which was formerly determined as the Yaolinghe Group and occurs as schist,yielded a single weighted peak age of 382 Ma.And detrital zircon analysis suggests that provenance is dominated by late Devonian magmatic rocks,with minor from the developed Wudang Group and Yaolinghe Group.The discovery of Late Paleozoic sediments assemblage and volcanic active materials in the formerly named Precambrian rock unit in the Huanglong-Fangtan area provides the basic information for reunderstanding the material composition of Wudang Mountain.Neoproterozoic-Mesozoic zircon dating data obtained for basalt,mable,diabase and sandstone matrix,along with field investigation for structural sections,suggest that lithological units in the Huanglong-Fangtan area in Shiyang are not Precambrian orderly structural-sedimentary layer but a mélange belt.
【Fund】: 中国地质科学院基本科研业务费(项目编号:YK1701、K1615);; 国家青年自然基金项目(编号:41402180)联合资助
【CateGory Index】: P534.4;P597.3;Q911.2
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved