Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Geotectonica Et Metallogenia》 2006-01
Add to Favorite Get Latest Update

CHARACTERISTICS AND IMPLICATION OF THE TOPOLOGY OF ZIRCONS FROM THE PERALUMINOUS GRANITES IN TIBET

LIAO Zhongli1, MO Xuanxue2, PAN Guitang1, ZHU Dicheng1, WANG Liquan1 and ZHAO Zhidan2(1. Chengdu Institute of Geology and Mineral Resources, Chengdu, SC 610082,China; 2. China University of Geosciences, Beijing 100083, China)  
Zircon is an important accessory mineral in Tibet peraluminous granites. In order to discuss the petrogenesis of peraluminous granites, zircon content, crystal form and the features of zircon group minerals in the Tibet peraluminous granites were studied in detail in this paper. As a result, five zircon crystal forms have been identified. Tibet peraluminous granites are formed in peraluminous setting conditions and originated at low crystallization temperature, ranging between 600 ℃~900 ℃, in magma chamber. The crystallization temperature for Gandese belt is higher than that for the Himalayan belt. The features of zircon groups in different tectonic belts yield different information on petrogenesis. The Himalayan belt is regarded as the crust source petrogenesis type, while for the Gandese belt mantle addition of source composition was expected for its crust source petrogenesis. These diferences show inhomogeneity of lithosphere composition and evolution of Tibet Plateau.
【Fund】: 国家重点基础研究发展规划项目(2002CB412609 G1998040800);; 中国地质调查局“青藏高原南部空白区基础地质综合研究”(编号:200313000025);; 中国地质大学“岩石圈构造、深部过程及探测技术”教育部重点实验室开放课题(编号:2003003)联合资助.
【CateGory Index】: P588.121
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