Volatile compositions of the Jinchuan ultra mafic intrusion and associated sulfide ores, western China
1 IntroelutionThe Jinchuan ultramafic intrusion, western China comprises ultramafic rocks crystallized from a high-Mg basaltic magma (Chai and Naldrett, 1992). It contains the third largest Ni-Cu sulfide deposit in the world. Assimilation of crustal S is widely thought to be critical for the genesis of other world-class Ni-Cu sulfide deposits associated with mafic-ultramafic rocks (e.g., Naldrett, 1999). However, the mechanisms of S transfer from country rocks to magma remains largely unknown. In this study we have used stepwise heating to extract volatiles from sulfide and silicate mineral separates from the Jinchuan Ni-Cu sulfide deposit. The compositions of volatiles released at elevated temperatures are used to evaluate ore genesis and postmagmatic hydrothermal modification.
Zhang Mingjie Hu P Q Tang Z L C Li Li W Y Jia Y Q Chen K N
Institute of Geology, Lanzhou University, Gansu 730000, China Department of Geological Sciences, Indiana University, Bloomington, IN 47405, USA Xian Center of Geological Survey, China Geological Survey, Xian 710000, China
国际会议
Xian International Ni-Cu(Pt) Deposit Symposium 2009(2009 西安·Ni-Cu(Pt)岩浆矿床国际学术研讨会)
西安
英文
74-77
2009-09-01（万方平台首次上网日期，不代表论文的发表时间）