中南大学学报（自然科学版）2018，Vol.49Issue(5)：1148-1159,12.DOI:10.11817/j.issn.1672-7207.2018.05.017
西天山阿希金矿床黄铁矿微量元素LA-ICP-MS原位测试及其指示意义
LA-ICP-MS trace element analysis of pyrite from Axi gold deposit in western Tianshan and its significance
摘要
Abstract
The Axi gold deposit in the western Tianshan is a typical low-sulfidation epithermal deposit. Based on the study of pyrite microstructure, the trace elements of the pyrite were analyzed by LA-ICP-MS. The results show that pyrite is divided into four generations in succession, i.e. coarse crushing like pyrite (PyⅠ), fine-grained euhedral pyrite (PyⅡ), coarse serrated pyrite (PyⅢ) and fine-grained pyrite (PyⅣ). The pyrite is rich in As, Sb and Ni, and is poor in Te and Se, and the majority of w(Co)/w(Ni) is less than 1,which reflects the low metallogenic temperature of the deposit. As, Sb, Co and Ni in the pyrite are mostly in the form of homo-isomorphs, Au and Ag probably occur as electrum inclusions in the PyⅡ. However, Au and Ag occur as the microscopic-gold and free-silver in the PyⅢ, and Pb, Cu and Zn are mostly in the form of inclusions. PyⅠoriginates from the common action of the hydrothermal fluids and the meteoric water fluids, while PyⅡand PyⅢ form in the process of circulating meteoric water fluids.关键词
LA-ICP-MS/黄铁矿/微量元素/阿希金矿/浅成低温热液Key words
LA-ICP-MS/pyrite/trace element/Axi gold deposit/epithermal分类
天文与地球科学引用本文复制引用
毛先成,魏清峰,三金柱,潘敏,刘占坤,汪凡云,邓浩,韩建民,樊红喜,夏芳,肖飞..西天山阿希金矿床黄铁矿微量元素LA-ICP-MS原位测试及其指示意义[J].中南大学学报（自然科学版）,2018,49(5):1148-1159,12.基金项目
国家自然科学基金资助项目(41472301) （41472301）
中南大学"创新驱动计划"项目(2015CX008)(Project(41472301)supported by the National Natural Science Foundation of China （2015CX008）
Project(2015CX008)supported by the Innovation Driven Program of Central South University) （2015CX008）
