Multiple-stage mineralization in the Sawayaerdun orogenic gold deposit, western Tianshan, Xinjiang: Constraints from paragenesis, EMPA analyses, Re-Os dating of pyrite (arsenopyrite) and U-Pb dating of zircon from the host rocks

详细信息    查看全文

• 作者：Guozhen Zhang^a ; Chunji Xue^a ; ^{chunji.xue@cugb.edu.cn} ; Guoxiang Chi^b ; Jiaying Liu^a ; Xiaobo Zhao^a ; Bo Zu^a ; Yun Zhao^a
• 关键词：Orogenic gold deposit ; EMPA ; Detrital zircon geochronology ; Re&ndash ; Os geochronology ; Sawayaerdun ; Southern Tianshan
• 刊名：Ore Geology Reviews
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：81
• 期：part_P1
• 页码：326-341
• 全文大小：3515 K
• 卷排序：81

文摘

Three generations of auriferous pyrite (Py0, Py1 and Py2) have been recognized. U–Pb dating of detrital zircons constrained the maximum deposition age of 355.0 ± 7.3 Ma. Auriferous pyrite (arsenopyrite) Re–Os dating yielded the ages of 323.9 ± 4.8 Ma and 282 ± 12 Ma, respectively. Py1 is interpreted to have formed in the syn-tectonic stage and Py2 was formed during the late- to post-tectonic stage. Os isotopes of auriferous separates from the two stages point to crustal sources of the metals.