Laser Microprobe ⁴⁰Ar-³⁹Ar Geochronology of Quartz from Dongzhongla Lead-Zinc Deposit in oft-com:office:smarttags" />Tibet and Its Significanceoft-com:office:office" />

• 责任者：Fei Guangchun (College of Earth Sciences ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Wen Chunqi
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2010
• 卷期：30(3)
• 关键词：氩—氩计时 ; Ar-Ar dating ; 铅锌矿床 ; lead-zinc deposit ; 念青唐古拉山 ; Nyainqentanglha Range
• 页码：p.38-43
• 图表：3 illus., 1 table, 17 refs.
• 分类号：1001
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

Dongzhongla ore deposit is located in the Zhaxue-Yaguila mineralization area, oft-com:office:smarttags" />Nyainqentanglha Range, Tibet and is a new founded middle-large size lead-zinc deposit. The host quartz veins in the Dongzhong lead-zinc deposit was measured by laser microprobe ⁴⁰Ar-³⁹Ar dating method in order to obtain the ore-forming age. As a result, the isochron age of the ore is (42.2±1.7) Ma, inverse isochron age is (42±3) Ma with the MSWD value of 2.4, and the initial ⁴⁰Ar/³⁶Ar value of 303.6±1.4. The measured age is in agreement with the inverse isochron age within a reasonable error range, and the dating results can be regarded as the ore-forming age of the Dongzhong lead-zinc deposit (formed during Early Eocene). oft-com:office:office" />