陕西安康梅子铺金矿区化探异常剖析及找矿潜力分析
Geochemical Characteristics and Analysis of the Prospecting Potential of Meizipu Gold Deposit in Ankang, Shaanxi
-
摘要: 陕西省安康梅子铺金矿区位于秦岭褶皱系北大巴山加里东褶皱带牛山地背斜南缘，通过土壤正规网地球化学测量，重新圈定了化探异常，Au、Ag、Cu、Pb、As、Sb、Bi异常明显，Au-Ag-Pb，As-Sb-Bi相关性较好。通过对异常元素的空间分布特征分析，表明成矿流体或成矿热液自东南向西北方向运移。对重点化探异常进行了优选验证，认为土壤异常与云母石英片岩、北东向片理构造三者配套是确定金矿化富集部位的“三位一体”找矿标志，构造和岩浆活动为主要控矿因素。Au-As-Pb -Ag -Sb异常元素套合良好，浓集中心明显，为矿致异常。Mt-2、Mt-4、Mt-5土壤异常是本区进一步找矿的远景地段。异常组合特征指示本区东部剥蚀程度较高，西部较低，推测西部可能存在金的隐伏矿体，具有较大找矿潜力。Abstract: The Meizipu gold deposit in Ankang of Shaanxi province is located in the southern margin of Niushandi anticline, Caledonian North-Daba mountain fold belt, Qinling fold belt. The geochemical anomalies are re-delineated through soil regular network geochemical measurements. Results indicate that the anomalies of Au, Ag, Cu, Pb, As, Sb, Bi are obvious, and there are good correlations among Au, Ag and Pb, as well as As, Sb and Bi. Spatial distribution characteristics analysis of anomaly elements reflects that the ore-forming fluid or hydrothermal fluids migrated from southeast to northwest. The validation and analysis of key anomalies confirm that the combination of anomaly, mica-quartz schist and east-north schistosity structure is the indicator for deposit of gold mineralization enrichment area. In addition, geological structure and magmatic activity are ore-controlling factors. The clear combination of Au, As, Pb, Ag, Sb elements and the obvious accumulation center indicate that the anomaly is mineralized anomaly. The soil anomalies of Mt-2, Mt-4 and Mt-5 are the potential exploration region in this area. Characteristics of geochemical anomaly indicate that the denudation of east is stronger than west. Therefore, it can be speculated that concealed ore body of gold may exist in western area, and there is a great prospecting potential.
-
Keywords:
- gold deposit /
- prospecting potential /
- geochemical /
- Meizipu /
- Ankang
-
-
栾世伟. 金矿地质及找矿方法[M]. 成都:四川科技出版社, 1987.
Luan Shiwei. Gold mine geology and prospecting methods[M]. Sichuan Science and Tecnology Press, Chengdu, 1987.
方维萱. 试论地球化学场研究方法[J].西北地质, 1992, 21(1):11-18.
Fang Weixuan. Geochemical field research methods[J].Northwestern Geology, 1992, 21(1):11-18.
熊亮, 朱杰勇, 等. 土壤地球化学测量在扬子地台西缘会泽铅锌矿带筇竹寺组中应用.物探与化探[J], 2010, 34(4):467-471.
Xiong Liang, Zhu Jieyong, et al.The application of soil survey to Qiongzhusi formation in the huize Pb-Zn etallogenic belt on the west margin of the Yangtze platform[J]. Geophsical and Geochemial Exploration, 2010, 34(4):467-471.
王瑞廷, 毛景文, 任晓华, 等. 区域地球化学异常评价的现状及存在的问题[J]. 中国地质, 2005, 21(1): 219-226.
Wang Ruiting, Mao Jingwen, Ren Xiaohua, et al. Facts and problems of the evaluation of regional geochemical anomalies[J].Geology in China, 2005, 21(1):219-226.
尚瑞钧, 李和祥, 晁援, 等. 秦巴金矿地质[M]. 安徽:安徽科学技术出版社, 1992.
Shang Ruijun, Li Hexiang, Chao Yuan, et al. Gold deposits geology in Qinling-Daba region[M]. Anhui Science and Technology Press, Anhui, 1992.
史长义, 张金华, 湟增芳. 内蒙古中部地区区域金异常快速筛选评价与找矿预测[A].第六届全国勘查地球化学学术讨论会论文选编, 2000:35-43.
Shi Changyi, Zhang Jinhua, Huang Zengfang.Evaluation of regional gold anomaly rapid screening and prospecting forecast in Central Inner Mongolia[A].The Sixth National reconnaissance geochemical Colloquium Selected Papers, 2000:35-43.
陕西省地质矿产局. 陕西省区域地质志[M].北京:地质出版社, 1989.
Geology and mineral bureau of Shaanxi province. The geology of Shaanxi province[M]. Geology Press, Beijing, 1989.
王宗起, 闫全人, 闫臻, 等. 秦岭造山带主要大地构造单元的新划分[J]. 地质学报, 2009, 83(11):1527-1546.
Wang Zongqi, Yan Quanren, Yan Zhen, et al. New division of the main tectonic units of the Qinling orogenic belt[J].Acta Geological Sinica, 2009, 83(11):1527-1546.
姚书振, 周宗桂, 吕新彪, 等.秦岭造山带成矿特征和找矿方向[J]. 西北地质, 2006, 39(2):156-177.
Yao Shuzhen, Zhou Zonggui, Lü Xinbiao, et al. Mineralization characteristics and prospecting potential in the Qinling metallogenic belt[J]. Northwest Geology, 2006, 39(2):156-177.
张本仁, 骆庭川, 高山, 等. 秦巴岩石圈构造及成矿规律地球化学研究[M]. 武汉:中国地质大学出版社, 1994.
Zhang Benren, Luo Tingchuan, Gao Shan, et al. Geochemical study of the lithosphere, tectonism and metallogenesis in the Qinling-Dabashan region[M]. Press of China University of Geosciences, Wuhan, 1994.
计量
- 文章访问数: 2898
- HTML全文浏览量: 0
- PDF下载量: 3590
下载:
