地质与勘探2017，Vol.53Issue(5)：867-879,13.
东昆仑夏日哈木铜镍硫化物矿床辉石特征及地质意义
Mineral Characteristics and Geological Significance of Pyroxene in the Xiarihamu Ni-Cu Sulfide Deposit in the East Kunlun Orogenic Belt, Northwestern China
摘要
Abstract
The discovery of the Xiarihamu Ni-Cu Sulfide deposit is of great significance in the deposit scale, metallogenic age and metallogenic belt. Pyroxene is one of the most important rock-forming minerals, which is widely present in all rock types of the deposit. This rock is mostly interstitial in peridotite, and cumulus crystal in pyroxenite and gabbro. Overall, the content of orthopyroxene is larger than that of clinopyroxene in the intrusion. Cr2 O3 content of pyroxene in peridotite, pyroxenite and gabbro has a decreasing trend, indicating that the ore-bearing peridotite, pyroxite and gabbro crystal-lized successively from early to late, while not all gabbro crystallized earlier than peridotite and pyroxenite. The relationships among the SiO2 , TiO2 and Na2 O contents of clinopyroxene show that the parental magma of Xiarihamu could be a tholeiitic magma. A higher Al2 O3 content of clinopyroxene (2. 55%~ 10. 61%) implies that the intrusion was contaminated by aluminous surrounding rocks during the generation of the intrusion.关键词
辉石/岩浆期次/同化混染/夏日哈木铜镍硫化物矿床/东昆仑造山带Key words
pyroxene/magmatic stages and pulses/contamination of surrounding rocks/Xiarihamu Ni - Cu sulfide deposit/East Kunlun orogenic belt分类
天文与地球科学引用本文复制引用
张志炳,李文渊,张照伟,钱兵,刘月高,彭欣..东昆仑夏日哈木铜镍硫化物矿床辉石特征及地质意义[J].地质与勘探,2017,53(5):867-879,13.基金项目
国土资源部公益性行业科研专项项目(201511020)、国家自然科学基金青年基金项目(41603050)和中国地质调查局"东昆仑铜镍多金属资源基地调查"二级项目(DD20160013)联合资助. （201511020）
