牟定郝家河铜矿区岩石地球化学找矿预测研究

【作者】 赖华；

【导师】 韩润生；

【作者基本信息】 昆明理工大学 ， 地球化学， 2010， 硕士

【摘要】 论文在楚雄新生代盆地国家固体矿产危机矿山接替资源找矿专项《云南省牟定县郝家河铜矿接替资源勘查》(项目编号：200653098)的资助下完成。作为滇中砂岩型铜矿重要组成的一部分,郝家河铜矿位于楚雄盆地中南部,处于康滇地轴南延元谋古陆西侧的楚雄盆地中南部,楚雄盆地西北以箐河-程海断裂为界,与巴颜喀拉印支褶皱系相邻；西南为红河断裂所限,同三江褶皱系相接；东以普渡河断裂及绿汁江断裂和康滇地轴长期隆起的元谋古陆相隔,为该区成矿控矿提供了有利条件。通过在云南郝家河铜矿区进行了两年半的野外地质调查和室内工作完成了1：5000构造地质填图、1：2000构造地球化学填图等工作,并结合前人资料,对成矿地质背景、成矿地质条件、矿床特征、地球化学等方面的综合研究,指出了郝家河铜矿成矿的控矿因素,上白垩统马头山组砂砾岩系为主要的含矿层。在查阅前人在滇中砂岩铜矿研究成果的基础上,结合工作区的地质条件,应用了岩石地球化学找矿方法,通过研究郝家河铜矿区地球化学特征和元素异常特征的研究,建立了地球化学异常理想模式。在铜矿体处指示元素组合为Cu-Ag-Mo-As-Sb-Hg；含矿层内指示元素垂向分带规律为(从上到下)：Zn→Cs→Pb-Tl-Mo→Cu-Ag-As→Sb-Hg；横向分带规律(从西到东)为Cu-Ag-Mo→Cu-Hg-Ag-Pb-Ba→Cu-Ag-Pb-As-Sb-Hg。通过岩石地球化学方法的应用,确定了成矿的地球化学异常特征,圈定了预测区A区7个有价值的异常,结合地层、岩性等有利控矿因素,圈定了找矿靶区,后已被勘查工程验实。实践证明,岩石地球化学找矿方法在本区是有效的。更多还原

【Abstract】 This thesis has been fluently finished under the project of exploration National crisis solid mines:Replaced copper resources exploration in Haojia river Mouding county Yunnan (item number:200 653 098).Haojia River copper deposit is a kind of typical Sandstone-type copper mineral in Yunnan. It is located in south-central of Chuxiong Basin, and in west side of Yuanmou ancient land, where the Kang-Dian axis extends southward. Due to Chuxiong Basin is bounded northwest by Qing River and Chenghai fault, and Bayan Har Indo-fold system, southwest by Red River Fault and Department of three rivers fold, east by Pudu River fault, Luzhi River fault and Yuanmou ancient land forming by long lime uplifted of Kang-Dian axis, this geological structure provides favorable conditions for forming mineralization. In addition, it prepares a theoretical basis for Prospecting of Application of rock geochemistry in Haojia River copper deposit.After more than two years of field geochemical survey in Haojia River copper deposit,1:5000 structural geological mapping,1:2000 tectonic geochemical mapping, etc. are completed, indicating ore-controlling factors of Haojia river copper deposit and the main ledge in the upper Cretaceous Matoushan group.Ideal model of geochemical anomalies had been established based on the study of research on the geochemistry and element anomalies in haojia river copper deposit and research on Sandstone copper before. The combination of indicator element In the copper ore body are arra nged in Cu-Ag-Mo-As-Sb-Hg. Vertical zonation of indicator elements wi thim seam arranging from top to bottom is:Zn→Cs→Pb-Tl-Mo→C u-Ag-As→Sb-Hg; lateral zonation from west to east is Cu-Ag-Mo→Cu-Hg-Ag-Pb-Ba→Cu-Ag-Pb-As-Sb-Hg.Through the application of geochemical exploration methods, the feature of metallogenetic geochemical anomaly is fixed. Seven valuabl e anomaly in A area in testing area is definite. According to some Or e-controlling factors such as stratum and lithology, prospecting targ et area circled is confirmed by Prospecting Engineering. It is proved that it is effective to use geochemical prospecting method in this a rea.更多还原