| 西藏甲玛铜多金属矿元素分布规律及地质意义 |
| 点此下载全文 |
| 引用本文：郑文宝,陈毓川,宋 鑫,唐菊兴，应立娟,黎枫佶，唐晓倩.2010.Element distribution of Jiama copper_polymetallic deposit in Tibet and its geological significance[J].Mineral Deposits,29(5):775~784 |
| Hits: 4835 |
| Download times: 3114 |
|
| 基金项目:本文得到西藏华泰龙矿业开发有限公司勘探项目、技术开发项目“西藏墨竹工卡县甲玛铜多金属矿床地质特征及找矿方向研究项目(E0804)”、国家科技支撑项目(编号2006BAB01A01)、青藏专项(编号1212010818089)的共同资助 |
|
| 中文摘要:甲玛铜多金属矿床已经成为冈底斯成矿带内为数不多的铜品位高、规模大、矿体连续性好的超大型斑岩-矽卡岩-角岩型铜多金属矿床。文章根据167个钻孔的成矿元素化学分析结果，对各元素平面分带、（Pb+Zn）/Cu、Au/Cu、Mo/Cu、Pb/Ag、Zn/Pb、Zn/Cu比值分带以及剖面上元素的分带等进行了系统分析，认为甲玛铜多金属矿具有典型的与岩浆成矿作用有关的元素分带特征，矿体由深部向浅部具有Mo→Mo（Cu）→Cu+Mo→Cu（Pb+Zn+Mo）→Cu（Pb+Zn）→Pb+Zn的成矿元素分带现象，具有高温→中低温成矿演化的特点。研究提出，成矿流体的运移方向是由北东至南西，流体源位于矿区北东部的则古朗地区。这种典型的热液分带特征同海底喷流沉积矿床近管道相Pb/Ag比值高、远离喷口Zn/Pb、Zn/Cu比值高的元素分带特征有着本质的区别。矿区北部则古朗地区高Mo/Cu比值以及钼元素矿化强度随标高降低愈强的分布特点，均预示了该地区是深部隐伏含矿斑岩体之所在。 |
| 中文关键词:地质学 斑岩-矽卡岩-角岩型矿床 矿床成矿系列 元素分带 甲玛铜多金属矿 西藏 |
| |
| Element distribution of Jiama copper_polymetallic deposit in Tibet and its geological significance |
|
|
| Abstract:The Jiama copper-polymetallic deposit is one of the few porphyry-skarn-hornfels type copper_polymetallic deposits characterized by high-grade, superlarge size and good continuity in the Gangdise copper metallogenic belt. Based on element chemical analytical results of 167 drill holes, this paper made a systematic analysis of the characteristics of planar zoning of various elements, the ratio zoning of (Pb+Zn)/Cu, Au/Cu, Mo/Cu, Pb/Ag, Zn/Pb, Zn/Cu and the zoning characteristics of the elements in section, and the results have confirmed that the ore deposit has typical magmatic metallogenic element zoning. From the depth to the shallow part, there existsthe zoning of Mo→Mo(Cu)→Cu(Mo)→ Cu(Pb-Zn-Mo)→Cu(Pb-Zn)→Pb+Zn, assuming the evolution of ore-forming elements from high temperature to low temperature. Studies show that the migration direction of the ore-forming fluid was from northeast to southwest, and the fluid source was located in Zegulang area in the northeast of the ore district. These characteristics are essentially different from elements zoning features of submarine exhalative sedimentary deposits. The high Mo/Cu ratios zoning in Zegulang area in the north of the ore district and the distribution of mineralization intensities of copper and molybdenum suggest that it is possible to find concealed porphyry ore bodies in the depth of the ore district. |
| keywords:geology, porphyry-skarn-hornfels type deposit, metallogenic series of ore deposit, element zoning, Jiama copper-polymetallic deposit, Tibet |
| View Full Text View/Add Comment Download reader |
|
|
|
