| 冀西北坝上地区石墨矿成矿模式及找矿模型 |
| |
| 作者姓名： | 齐新国 王广 付茂英 张燕波 |
| |
| 作者单位： | 1.中国建筑材料工业地质勘查中心河北总队,保定 071051;2.保定理工学院,保定 071000 |
| |
| 基金项目： | 中国地质调查局“中西部地区晶质石墨等特种非金属矿产调查(编号: DD2016058)”项目资助 |
| |
| 摘 要： | 通过分析冀西北坝上地区石墨矿地质背景、含矿带、矿体、含矿建造、变质变形及混合岩化特征,总结得出该区石墨矿的成矿特征。通过对比区域典型石墨矿床与同一成矿带相邻石墨矿床的地质特征,结合区域大地构造演化规律,总结了石墨矿的成矿模式。按照“三位一体”找矿理论,总结了石墨矿的成矿地质体及构造特征,构建了石墨矿综合找矿模型。该区石墨矿呈似层状赋存于红旗营子岩群含石墨变粒岩中,矿带分布受大型复式褶皱控制,含矿建造的沉积时代为古元古代早期,变质成矿时代为古元古代中期,变质程度为角闪岩相,成因类型为区域变质型。该区为浅覆盖区,“低阻-高极化”物探异常是重要的地球物理找矿标志,地质-物探-钻探相结合是石墨找矿快速、有效的手段。
|
| 关 键 词： | 冀西北 晶质石墨矿 红旗营子岩群 成矿模式 找矿模型 |
| 收稿时间： | 2019-03-25 |
Metallogenic model and prospecting pattern of graphite deposits in Bashang area of Northwest Hebei |
| |
| Authors: | QI Xinguo WANG Guang FU Maoying ZHANG Yanbo |
| |
| Institution: | 1. Hebei Branch of China National Geological Exploration Center of Building Materials Industry, Baoding 071051, China;2. Baoding University of Technology, Baoding 071000, China |
| |
| Abstract: | On the basis of the comprehensive analysis of regional geological background, ore-bearing belts, ore body, ore-bearing formation, modification and deformation, as well as migmatization, the authors summarized the metallogenic characteristics of graphite deposits in Bashang area of Northwest Hebei. Through the comparison between typical regional metamorphic graphite deposits and adjacent graphite deposits in the same metallogenic belt, on the basis of the evolution law of regional tectonics, the authors summarized the metallogenic model of graphite deposits in this area. According to the “trinity” prospecting theory, they summarized the metallogenic characteristics of geological bodies, structures and graphite deposits in this area, and built the comprehensive prospecting pattern of crystalline graphite deposits. The graphite deposits in this area are stratiform, and exist in the graphite-bearing granulite of Hongqiyingzi rock group. The distribution of metallogenic belt is controlled by large-scale compound folds. The sedimentary period of ore-bearing formation is early Paleoproterozoic, and the metamorphic metallogenic period is middle Paleoproterozoic. The metamorphic degree is amphibolite facies, and the genetic type belongs to a regional metamorphic type. Because the study area is in a shallow-covered condition, the geophysical anomaly of “low resistivity-high polarization” is an important geophysical prospecting indicator. It is a rapid and effective method to explore the graphite deposits in this area by means of geology-geophysics-drilling combination. |
| |
| Keywords: | Northwest Hebei crystalline graphite deposits Hongqiyingzi rock group metallogenic model prospecting pattern |
|
| 点击此处可从《》浏览原始摘要信息 |
| 点击此处可从《》下载免费的PDF全文 |
|
