• 责任者：Gong Chen (No.915 Geology Party ; jiangxi Bureau of Geology and Mineral Resources ; Nanchang 331202 ; China) ; Peng Jianhua
• 刊名：Resources Survey & Environment
• 出版年：2013
• 卷期：34(4)
• 页码：p.249-256
• issnNo：ISSN1671-4814
• isbnNo：CN32-1640/N

The S-N trending graben system in Dajiacuo area, Qinghai-Tibetan plateau, is located in the northern margin of Gondwana with extension direction of 175-190;, extension length;50 km and extension width of 5-15 km. According to the dating results of basalts in Yulinshan Formation and activities hot-springs de- veloped in the graben tectonic belt, it is considered that the tectonic activity of the graben is earlier than 13.43 Ma and the strong activity is still undergoing up to now. Five metallic mineral occurrences are found in the horsts developed in the eastern and western side of the Dajiacuo graben system, showing a close re- lationship of mineralization with intermediate-acid rocks and S-N-trending fault, especially those S-N-tren- ding intermediate-acid minor-intrusions are more favourable for forming porphyry copper deposits.