Precise U-Pb zircon-baddeleyite age of the Jinchuan sulfide ore-bearing ultramafic intrusion, western China

被引：82
|
作者：
Zhang, Mingjie [2 ]
Kamo, Sandra L. [3 ]
Li, Chusi [1 ]
Hu, Peiqing [2 ]
Ripley, Edward M. [1 ]
机构：
[1] Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA
[2] Lanzhou Univ, MOE Key Lab Western Chinas Environm Syst, Lanzhou 730000, Peoples R China
[3] Univ Toronto, Jack Satterly Geochronol Lab, Dept Geol, Toronto, ON M5S 3B1, Canada
来源：
MINERALIUM DEPOSITA | 2010年 / 45卷 / 01期
关键词：
Zircon; Baddeleyite; U-Pb dating; ID-TIMS; Jinchuan; China; Ni deposit; NI-CU DEPOSIT; NORTHWEST CHINA; DECAY CONSTANTS; HALF-LIVES; ID-TIMS; GEOCHRONOLOGY; ISOTOPE; GENESIS; GANSU; CONTAMINATION;
D O I：
10.1007/s00126-009-0259-x
中图分类号：
P3 [地球物理学]; P59 [地球化学];
学科分类号：
0708 ; 070902 ;
摘要：
The Jinchuan ultramafic intrusion in western China hosts the third-largest magmatic Ni-Cu deposit in the world. The crystallization age of the intrusion has long been debated. Here, we present a U-Pb ID-TIMS zircon age of 831.8 +/- 0.6 Ma obtained on thermally annealed and chemically etched zircons from a lherzolite sample. The coexisting baddeleyite in the sample is indistinguishable from the age of zircon. Our new results confirm that the emplacement of the Jinchuan ultramafic intrusion was temporally related to the breakup of the Rodinia supercontinent.
引用
收藏
页码：3 / 9
页数：7
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