地质科技情报2017，Vol.36Issue(2)：151-159,9.DOI:10.19509/j.cnki.dzkq.2017.0220
陕西勉略宁地区旧房梁金矿床元素地球化学特征及成矿意义
Element Geochemistry and Metallogenic Significance of Jiufangliang Gold Deposit in Mianluening Region, Shaanxi Province
摘要
Abstract
The metallogenic fluid and ore-forming material sources have been discussed by selecting a gold sampling profile of Jiufangliang gold deposit.Jiufangliang gold deposit is located in Bikou Group of Upper Proterozoic in Mianluening delta region,Shaanxi Province.The distribution and occurrence of ore bodies are strongly controlled by strata lithology and trending ductile shear zones.The genetic type of this deposit is greenstone gold deposit type.The research on the main,trace and REE geochemical characteristics and mineralization of its ore,roof and floor rock samples yields the following results.The trace elements better positively correlated with Au are Ag,Hg,Bi and Mo.In the mineralization process,Al2O3,TFe2 O3 and high field strength elements of ore and wall rocks are relatively stable.Large ion lithophile elements are lost in the ore and wall rocks but enriched in bottom and roof rock.The performance of sulphophile elements is complex.Pb is enriched in roof rock and oxidized ore and Mo,Hg generally increase in the ore rocks.The whole mineralization process is accompanied by a loss of the rock mass.The REE distribution model shows the positive Ce anomaly and the negative Eu anomaly of the surrounding rock near ore according to surrounding rock far from the ore.All of the above characteristics indicate that the ore-forming fluid has the characteristics of high temperature and reducibility.Combined with the characteristics of fluid inclusion and sulfur isotopic of this deposit,we assume the ore-forming material sources may have a relationship with Bikou Group.The metallogenic process of this deposit may be widespreadly relevant to NNE ductile shear deformation in the area in Chengjiang period.Structural mineralized alteration relates to material components of wall rocks with certain inheritance and differences.关键词
旧房梁/微量元素/成矿过程/勉略宁Key words
Jiufangliang/trace element/mineralization/Mianluening分类
地质学引用本文复制引用
张利亚,陈守余,廖时理..陕西勉略宁地区旧房梁金矿床元素地球化学特征及成矿意义[J].地质科技情报,2017,36(2):151-159,9.基金项目
陕西省地质矿产勘查开发局地质勘查及科研专项基金项目(陕地财发[2009]34号) （陕地财发[2009]34号）
