- 责任者：Qin Zhipeng (Chengdu University of Technology ; Chengdu 610059 ; China) ; Wang Xiongwu
- 刊名：Mineral Deposits
- 出版年：2011
- 卷期：30(2)
- 关键词：中性岩 ; neutral rocks ; 酸性岩 ; acidic rocks ; 铀—铅计时 ; U-Pb dating ; 西藏 ; Tibet
- 页码：p.339-348
- 图表：5 illus., 1 table, 13 refs.
- 分类号：0801
- 出版序号：815
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
///This paper deals with the emplacement timing of the intermediate-acidic intrusive rocks in Jiama of Tibet and its metallogenic significance. Based on the measured geological data and LA-ICP-MS U-Pb zircon ages of the four intermediate-acidic intrusive rocks, the authors preliminarily regularized the timing sequence, which is from early to late in order of porphyry granite (15.31 Ma～16.27 Ma)-quartz diorite porphyrite-adamellite porphyry (14.81 Ma)-granodiorite-porphyry; Exemplified by molybdenum, the Jiama ore deposit assumes three periods of metallogenesis, i.e., the ore-forming processes corresponding respectively to different degrees of magmatic activities of porphyry granite or quartz diorite porphyrite, adamellite porphyry and granodiorite-porphyry. The Jiama ore deposit resulted from the superposition of the three periods of magma-mineralization.