黄山—镜儿泉镍铜成矿带地球物理、地球化学特征及找矿意义  

On geophysical and geochemical characteristics of Huangshan-Jing'erquan Ni-Cu belt and its ore prospecting significance

作　　者：娄德波[1] 肖克炎[1] 丁建华[1] 

机构地区：[1]中国地质科学院矿产资源研究所,北京100037

出　　处：《地质学刊》2013年第3期372-377,共6页Journal of Geology

基　　金：国家自然科学基金项目(41002119);中央公益性科研院所基本科研业务费专项资金项目(K1103);中国地质调查局项目"全国重要矿产总量预测"(1212010733806);中国地质调查项目(12120113091500)资助

摘　　要：为了进一步确定黄山—镜儿泉镍铜成矿带的找矿勘查方向,对该地区航空磁测资料、岩屑或水系沉积物中的Ni元素进行了分析。结果显示:研究区西北部吐哈盆地具有航磁低背景、弱异常且异常分散,化探高背景、弱异常且异常分散的特点;研究区中部康古尔大断裂带具有航磁高背景、强异常且异常呈带状分布,化探呈低背景、强异常且异常呈带状分布的特点;研究区东南部具有航磁低背景、强异常、异常呈带状分布,化探呈低背景、强异常、异常呈带状分布的特点。这可能是由于石炭世晚期—二叠纪早期的地幔柱事件,在研究区中部和东南部沿深大断裂或者在上地壳发生内侵,形成巨大的镁铁-超镁铁质侵入体;或者直接喷溢到地表,形成大规模的溢流玄武岩分布;或者可能2种情况同时发生。到新生代,二叠纪的溢流玄武岩被剥蚀运移到西北部地形较低的吐哈盆地,而只残留其根部,中部和东南部呈带状分布的航磁异常和Ni异常是可能的找矿有利地段。In order to improve the geological understanding of ore formation in Huangshan-Jing＇erquan Ni-Cu metallogenetic belt and further determine the direction of ore exploration, the authors treated and analyzed the magnetic survey data and Ni element from debris geochemical data. The results showed that Turpan-Hami Basin in the northwest of study area was characteristic of low background, weak anomaly and abnormal dispersion for airborne magnetometer, high background, weak anomaly and anomaly dispersion for geo- chemical exploration ; Kangguer Fault in the center of the study area was characteristic of high airborne magnetic background and strong abnormal, low background, strong anomaly and banded anomaly distribution for geochemical exploration ; the southeast of the study are- a was characteristic of low airborne magnetic background, strong anomaly and banded anomaly distribution, low background, strong a- nomaly and banded anomaly distribution for geochemical exploration. The above phenomena was related to mantle plume event occurred in late Carboniferous Epoch to early Permian period, that formed huge mafic and uhramafic intrusions intruded along the deep fracture in the central and southeast parts of the study area or into the upper crust or poured out onto the surface, forming flood basalt of large scales. The Permian flood basalt was denudated and migrated to Turpan-Hami Basin in the north west of low relief in Cenozoic era with roots remained. The banded magnetic anomalies and Ni anomaly in the central and southeast parts of the study area were favorable tracts for ore exploration.

关 键 词：磁测 Ni元素 镍铜硫化物矿床 黄山-镜儿泉 新疆 

分 类 号：P618.41[天文地球—矿床学] P618.63[天文地球—地质学]