Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Geologica Sinica》 2011-07
Add to Favorite Get Latest Update

Zircon U-Pb Ages of Ore-bearing Granitic Bodies in Northern Jiujiang-Ruichang Metallogenic District of the Mineralization Belt of the Middle-Lower Reaches of the Yangtze River,and Its Geological Significance

CHEN Zhihong1),XING Guangfu1),GUO Kunyi1),ZENG Yong1),KUANG Fuxiang1),HE Zhenyu2),KE Xue1),YU Minggang1),ZHAO Xilin1),ZHANG Yong1)1)Nanjing Center,China Geological Survey,Nanjing,210016;2)Key Laboratory for Continental Dynamics of MLR,Institute of Geology,Chinese Academy of Geological Science,Beijing,100037  
The Jiujiang-Ruichang area is an important ore concentrated district in the western section of the Cu-Fe-Au(S) mineralization belt of the Middle-Lower Reaches of the Yangtze River.Five poorly-stuided granitic rocks at Dingjiashan,Yangjisha,Baoshan,Tongling,and Daliang,which are closely related to Cu-Au mineralization,were selected to conduct zircon LA-ICP-MS U-Pb dating and explore its geological significance.Zircon U-Pb dating results indicate that these granitic rocks formed in Late Jurassic to Early Cretaceous at 145.4±1.2 Ma,144.8±1.3 Ma,143.6±1.2 Ma,141.2±1.3 Ma and 146.4±1.2 Ma,respectively,and may be the product of the Createcous magmatic activity.In combination to regional geological data,it is believed that the petrogenetic and metallogenic event in the Jiujiang-Ruichang ore concentrated district may occur in a transitional environment from the early orogeny stage of the paleo-Pacific plate subduction to the subsequent back-arc extensional environment.However,much research is necessary to study whether they were formed by partial melting of overthickened or delaminated lower crust,or resulted from the oceanic ridge subduction along the lower Yangtze River area.
【Fund】: 中国地质调查局地质矿产调查评价项目(编号[2010]矿评(01-16-4)、(01-16-5)和(01-16-22))资助的成果
【CateGory Index】: P597.3
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