西秦岭代家庄铅锌矿成矿特征和找矿方向

发布时间：2018-10-19 07:00

【摘要】：西秦岭是甘肃省的重要铅锌矿床产出区域,地质研究工作程度高,找矿成果丰硕,地质勘查工作程度较高。但就目前探明的优势矿种、矿产地数量与西秦岭地区的成矿地质背景不相称,在该区进行找矿的潜力较大。因此,就如何深化对西秦岭地区矿床成矿的认识,对提升本区矿床成矿规律研究水平,以达到指导矿产勘查评价工作具有现实意义。本文重点对西秦岭地区的代家庄铅锌矿的成矿背景、地质特征、物、化、遥资料的分析研究,得出了以下结论:⑴通过对代家庄铅锌矿床与西成矿田在地质特征,主矿体形态、矿石组构、矿物成分、氧化矿与原生矿生成关系的对比分析,确定了代家庄铅锌矿床成因属为沉积再造型铅锌矿。⑵结合野外地质工作,明确了代家庄铅锌矿代家庄矿床产于西成盆地西北端泥盆系龙鳞桥组含生物化石的碎屑岩-灰岩、硅质岩中,泥盆系为主要含矿层,矿石主要以氧化矿为主。⑶根据研究区内的地球物理特征和化探异常特征,在研究区内划出了三个铅锌矿成矿远景区和9个铅锌矿找矿靶区。代家庄铅锌矿则属于茶埠-厂坝铅锌矿远景预测区。⑷本文对代家庄铅锌矿矿床成因特征进行了系统的分析,认为代家庄铅锌矿区及外围地区具有比较好的找矿前景。
[Abstract]:West Qinling is an important lead-zinc deposit producing area in Gansu Province, with high degree of geological research, rich prospecting results and high degree of geological exploration. However, the number of mineral sites is out of proportion to the metallogenic geological background of the West Qinling region, and the prospecting potential in this area is great. Therefore, it is of practical significance to deepen the understanding of ore deposit mineralization in the West Qinling region and to improve the research level of ore deposit metallogenic law in this area so as to guide the mineral exploration and evaluation work. In this paper, the metallogenic background, geological characteristics, material, chemical and remote data of the Daijiazhuang lead-zinc deposit in the western Qinling region are analyzed and studied, and the following conclusions are drawn: 1 through the geological characteristics and the main orebody morphology of the Daijiazhuang lead-zinc deposit and the western metallogenic field, A comparative analysis of the relationship between ore fabric, mineral composition, oxidized ore and primary ore formation shows that the Dejiazhuang lead-zinc deposit belongs to sedimentary remolded lead-zinc deposit. 2 combined with field geological work, It is clear that the Dejiazhuang deposit of Daijiazhuang lead-zinc ore deposit occurred in the detrital rock and limestone bearing biofossils of the Devonian Longliqiao formation at the northwest end of the Xicheng Basin, in which the Devonian is the main ore-bearing bed. The ore is mainly oxidized ore. 3 according to the geophysical characteristics and geochemical anomaly characteristics of the study area, three lead and zinc ore metallogenic areas and nine lead and zinc ore prospecting targets have been identified in the study area. The Dejiazhuang lead-zinc deposit belongs to the prospective prediction area of Caibo-Changba lead-zinc deposit. 4 the genetic characteristics of the Dejiazhuang lead-zinc deposit are systematically analyzed, and it is considered that the Dejiazhuang lead-zinc ore area and its peripheral areas have better prospecting prospects.
【学位授予单位】：兰州大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.4

【相似文献】