云南镇康地区重磁异常特征及找矿方向  

Magnetic and Gravity Anomaly Characteristics and Prospecting Direction of Zhenkang Region in Yunnan Province

作　　者：左琼华[1] 王伟 朱婉明[1] 李开毕 杨淑胜 蔡旭[2] 李永彪[1] 李兴涛[1] 马伟[1] 

机构地区：[1]云南国土资源职业学院,云南昆明650217 [2]云南省地质调查院,云南昆明650000

出　　处：《昆明理工大学学报（自然科学版）》2016年第3期43-55,共13页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：中国地质调查局矿产远景调查项目(1212011085126)

摘　　要：镇康地区位于三江成矿带南段的保山-永德(镇康)地块内.在特定的成矿地质背景下构成了铅、锌、铜、铁、锡、锑、铌钽等多金属矿集区,是云南镇康芦子园-云县高井槽地区铁铅锌铜多金属矿国家整装勘查区.本文在系统分析该区找矿成果的基础上,将1∶50 000重、磁异常进行叠加套合后发现,重力剩余异常形态与磁异常特征相似,为正、负异常伴生,展布方向主要为北东向,且延伸较长,规模大、极值强、与已发现呈带状分布的大中型矿床套合程度高,通过对芦子园-小河边铁矿-天生桥磁异常加密工程验证证明,该区采用重、磁找矿方法是有效的.并在研究区内通过重、磁异常特征分析及其与成矿关系研究,成功建立镇康地区重磁找矿预测模型,圈定了三个找矿异常区.Zhenkang area is located in Baoshan -Yongde （Zhenkang） block, southern section of Sanjiang metallogenic belt. Under the specific ore - forming geological conditions, the accumulation area of Pb, Zn, Cu, Fe, Sn, Sb, Nb and Ta polymetallic is formed, which is Luziyuan -Gaojingcao Fe -Pb -Zn -Cu polymetallic integrated exploration area. Based on the systematic analysis on the basis of prospecting results in the area, gravity and magnetic anomaly and superposition to 1 ： 50 000 sets, it is found that the residual gravity anomaly and magnetic anomaly characteristics are similar. The positive and negative anomalies are associated, the distribution direction mainly on the east to the north, with a longer extension, large scale, strong extremum, which fits the pattern in the distribution of the strip of the high degree, middle or large - sized deposits sheath. The effectiveness of this method is verified through Luziyuan - Xiaohebian - Tianshengqiao magnetic anomaly encryption engineering. Through the analysis of gravity and magnetic anomaly characteristics and mineralization, the prospecting prediction model in Zhenkang area is established to select three prospecting anomaly areas.

关 键 词：镇康地区 重力异常 磁异常 找矿方向 

分 类 号：U461[机械工程—车辆工程] TP308[交通运输工程—载运工具运用工程]