| 曾祥涛.陕西省双王金矿床五号矿体黄铁矿标型特征研究[J].地质与勘探,2012,48(1):76-84 |
| 陕西省双王金矿床五号矿体黄铁矿标型特征研究 |
| Typomorphic Characteristics of Pyrite of the No. 5 Ore Body in theShuangwang Gold Deposit,Shanxi Province |
| 投稿时间：2011-07-21 修订日期：2011-10-26 |
| DOI： |
| 中文关键词: 黄铁矿 标型特征 双王金矿 陕西 |
| 英文关键词: pyrite,typomorphic characteristic,Shuangwang gold deposit,Shanxi Province |
| 基金项目:本文为国家自然科学基金项目(41030423)和中国黄金集团公司科技项目“陕西省太白县双王金矿床地质特征、成矿规律及找矿靶区再研究冶资助成果 |
|
| 摘要点击次数: 2788 |
| 全文下载次数: 2033 |
| 中文摘要: |
| [摘 要]双王金矿是产于西秦岭泥盆系地层中的一个大型低品位角砾岩型金矿。对其主要载金矿物黄铁矿进行的标型特征研究表明,五号矿体(KT5)中黄铁矿以含金较好的{111}和{hk0}习性为主,占75%,{100}习性占25%。晶体形态分值图反映出KT5 黄铁矿含金性为西高东低,有向79 线以西延伸的趋势。黄铁矿热电系数变化主要集中在﹣250～250μV/ ℃范围内,整个矿区主要以N-P 混合型黄铁矿为主,P 型率在矿体西部向下有增大的趋势。头晕元素Sb、Ba 从上到下为先降后增,在75 线和71线间出现明显头晕反转现象,并且总体有向79 线以西富集的趋势。近矿晕元素Cu、Pb、Zn 由上到下有向75 线以下、79 线以西富集的趋势。尾晕元素Bi 由上到下呈现降低的趋势,且在57 ～ 65 线之间与近
矿晕元素Pb 有明显的叠加,指示KT5 在此区间接近矿化底端。而Mo、Co 元素在73 ～ 77 线之间富集,且与前缘晕共存,指示深部可能有盲矿体。 |
| 英文摘要: |
| Abstract:The Shuangwang gold deposit,located in Devonian stratum of the West Qinling,Shanxi Province,is a low-grade large breccia-type gold deposit. The typomorphic characteristics of pyrite,which is the main gold-bearing mineral,are studied in detail in this paper. The main crystal forms of pyrite are the {111} and {hk0},which accounts for 75%. While the crystal form of {100} is 25%. The diagram of crystal form values exhibit the gold potentiality increasing from east to west,with the trend extending to the west of exploration line No. 79. The thermoelectric coefficients of the pyrites range from -
250 to 250μV/℃. The thermoelectric conductive type of pyrites is mainly N-P type with the characteristics of N type and P type. The P type increases at the low part of the west ore body. The head halo elements Sb and Ba first decreases and then increases from up to down,and appears significant head halo inversion between exploration lines Nos. 71-75,with the enrichment trend on the west of exploration line No. 79. From upper to lower,near-ore halo elements Cu,Pb,and Zn have enrichment trend under the exploration line No. 75 and in the west of exploration line 79. Rear halo element Bi enriches from
upper to lower,with significantly high of the near-ore halo element Pb between the exploration lines Nos. 57-65,indicating that KT5 is close to the bottom of mineralization in this interval. High content of rear elements Mo and Co and coexisting with head halo elements between the exploration lines Nos. 73-77 show that there may exist blind ore bodies at depth. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
|
|
|
