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段启超(1989-),男,河南禹州人,硕士研究生,从事固体矿产勘查与评价方面的研究工作。dqc_hpu@163.com |
收稿日期: 2020-03-29
修回日期: 2020-05-13
网络出版日期: 2020-08-27
基金资助
河南省2018年度“探矿权、采矿权”价款“河南省灵宝市董家埝银多金属矿地质普查”(2018-22-06)
河南省地质矿产勘查开发局2017年度地质科研项目“河南灵宝市小河岩体南缘断裂构造带成矿预测研究”(2017-01)
Primary Halo Characteristics and Geological Significance of the Dongjianian Silver Deposit in Lingbao City,Henan Province
Received date: 2020-03-29
Revised date: 2020-05-13
Online published: 2020-08-27
董家埝银矿是豫西小秦岭矿集区南成矿带目前发现的唯一大型矿床。为了矿床深部勘查工作的顺利进行,了解有用元素在垂向上的变化规律,选用原生晕地球化学方法,通过典型矿床剖面的原生晕特征研究,实现对深部矿体变化趋势的判断。经计算,确定As、Sb、Ag、Au、Cu、Pb、Zn、Co和Mo等9种元素可作为指示元素,其中As和Sb为前缘晕指示元素,Ag、Au、Cu、Pb和Zn为近矿晕指示元素,Co和Mo为尾晕指示元素。分带指数和浓集指数2种方法计算得出的元素在分带序列上的位置总体趋势一致。用分带指数法确定的主矿体自上而下的原生晕轴向分带序列为Co-Mo-Cu-Au-Sb-Zn-Pb-Ag-As,出现“反分带”现象。结合原生晕地球化学参数变化特征、矿体剥蚀程度研究和理想模型,预测M1-I主矿体向深部仍有较大的延伸。研究成果可以为区域同类型矿化地质体深部的趋势判断和决策提供参考。
段启超 , 庞绪成 , 纵瑞 , 韩迪 , 张岩 , 张鑫 . 河南省灵宝市董家埝银矿原生晕特征及地质意义[J]. 黄金科学技术, 2020 , 28(4) : 497 -508 . DOI: 10.11872/j.issn.1005-2518.2020.04.066
Dongjianian silver deposit is the only large deposit found in the south metallogenic belt of Xiao-qinling ore-gathering area. In order to coordinate with the smooth development of the deep exploration of the deposit,the change rule of the useful elements in the vertical direction of the deposit was understood,and the primary halo geochemical method was adopted to determine the change trend of the deep orebody by studying the primary halo characteristics of the typical ore deposit profile. By the analysis of mathematical statistics,and Ag has significant correlation elements Au,Cu,Pb,Zn,As,Sb,W,Ag content of elements is the main source of F1 factor As,Ag,Pb,Au,Zn,Sb element combination,is the main ore-forming elements combination,As,Sb element combination is a typical low temperature elements,they were placed in the same combination as the medium temperature elements of Pb,Zn,Ag and Au,explain Dongjianian silver deposit has many times characteristics,ore-forming process secondary source is F2,F4 factor. Finally,9 elements such as As,Sb,Ag,Au,Cu,Pb,Zn,Co and Mo were determined indicator elements. Among them,As and Sb are indicators of leading edge halo,Ag,Au,Cu,Pb and Zn are indicators of near-ore halo,and Co and Mo are indicators of tail halo. The primary halo axial zoning sequence of the main orebody from top to bottom determined by the zoning index is Co-Mo -Cu-Au-Sb-Zn-Pb-Ag-As,showing the phenomenon of “opposite direction zoning”.Combined with the change characteristics of primary halo geochemical parameters,the study on the denudation degree of orebody and the ideal model,it is predicted that the M1-I main orebody still has a large extension to the depth. The research results can be used as a reference for the research and decision of the deep trend of the same type of mineralized geological body in the region.
http://www.goldsci.ac.cn/article/2020/1005-2518/1005-2518-2020-28-4-497.shtml
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