西北地质2012，Vol.45Issue(4)：302-313,12.
新疆菁布拉克含铜镍矿杂岩体形成时代与地球化学特征
Chronology and Geochemistry of Jingbulake Complex Containing Cu-Ni Mineralization , West Tianshan Mountain, NW China
摘要
Abstract
The Jingbulake complex containing Cu-Ni Mineralization in west Tianshan Mountain is located in the south of Yili block. The pyroxene diorite has a LA-ICP-MS zircon U-Pb isotope age of (414. 8±0. 9) Ma. The contents of REE has little change in all rocks, which have flat chondrite-normalized rare element or slight LREE enrichment pattern and that of La/Sm (1. 07-2. 62) and Mg# (0. 59-0. 85) . They are enriched in large ion lithophile elements, such as Cs, Ba, Sr, and show negative Nb-Ta 、 Zr、 Hf and Ti a-nomalies on mantle-normalized trace element diagrams. They have positive εNd values ( + 3. 8-+6. 3) , which indicated a depleted mantle source. The genesis of the Jingbulake complex suggests subduction of the South Tianshan oceanic lithosphere beneath the Ylli-Central Tianshan block. The subduction-related fluids triggered the melting of the mantle. The genesis of the rocks and mineralization caused by magmatic differentiation and slight crustal contamination.关键词
菁布拉克/镁铁-超镁铁岩体/锆石U-Pb定年/成岩成矿过程Key words
Jingbulake/ mafic-ultramafic rocks/ Zircon U-Pb dating/ genesis of rocks and the deposit分类
天文与地球科学引用本文复制引用
张江伟,臧遇时,张照伟,李文渊,谢德胜,高永宝,王亚磊,郭周平,李侃,钱兵..新疆菁布拉克含铜镍矿杂岩体形成时代与地球化学特征[J].西北地质,2012,45(4):302-313,12.基金项目
国家自然科学基金(40772062、41102050),中国地质调查局地质大调查项目(1212010911032、1212011220897、121201112088、1212011120183和1212011121092) （40772062、41102050）
