地面高精度磁测在青海夏日哈北铁多金属矿勘查中的应用
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摘要
夏日哈北铁多金属矿位于青藏高原东北部柴达木盆地东北缘,区内褶皱、断裂构造发育,岩浆活动强烈,成矿地质条件优越。通过1:10000地面高精度磁测工作,圈定了四种类型磁异常,其中正负伴生磁异常为本区找矿指示异常。本次圈定8个正负伴生磁异常带,其中7个磁异常带为矿致异常,结合工作区地质特征综合分析,初步查明了该地区磁场特征与矽卡岩型铁多金属矿的对应关系。认为地面高精度磁测是该地区寻找铁多金属矿的有效物探方法。
Xiarihabei iron polymetallic deposit is located in the northeastern margin of Qaidam Basin, northeastern Qinghai-Tibet Plateau, where folds and faults are well developed, magmatic activity is intense, and metallogenic geological conditions are favorable. Four types of magnetic anomalies have been identified by 1:10000 surface high-precision magnetic survey. Positive and negative associated magnetic anomalies are indicative anomalies for prospecting in this area. This paper delineates eight positive and negative associated magnetic anomaly zones, seven of which are ore-induced anomalies. Combinied with the comprehensive analysis of geological characteristics of the working area, the relationship between magnetic field characteristics and skarn iron-polymetallic deposits in this area has been preliminarily ascertained. We suggest that the high-precision magnetic survey on the ground is an effective geophysical method for finding iron polymetallic deposits in this area.
Xiarihabei iron polymetallic deposit is located in the northeastern margin of Qaidam Basin, northeastern Qinghai-Tibet Plateau, where folds and faults are well developed, magmatic activity is intense, and metallogenic geological conditions are favorable. Four types of magnetic anomalies have been identified by 1:10000 surface high-precision magnetic survey. Positive and negative associated magnetic anomalies are indicative anomalies for prospecting in this area. This paper delineates eight positive and negative associated magnetic anomaly zones, seven of which are ore-induced anomalies. Combinied with the comprehensive analysis of geological characteristics of the working area, the relationship between magnetic field characteristics and skarn iron-polymetallic deposits in this area has been preliminarily ascertained. We suggest that the high-precision magnetic survey on the ground is an effective geophysical method for finding iron polymetallic deposits in this area.
引文
[1] 青海省都兰县夏日哈北铁多金属矿预查工作总结[R].西北有色地质勘查局七一七总队,2015.
[2] 张占玉.青海省都兰地区矽卡岩型铁多金属矿地区特征及成矿规律[J].地质与勘探,2011,47(06):994-1001.
[3] 管志宁.地磁场与磁力勘探[M].北京:地质出版社,2005.
[4] DZ/T 0071-93地面高精度磁测技术规程[S].中华人民共和国地质矿产部,1993.
[5] 牛永升.青海夏日哈北铁多金属矿地质特征及控矿因素分析[J].甘肃冶金,2016,38(02):90-97.
[2] 张占玉.青海省都兰地区矽卡岩型铁多金属矿地区特征及成矿规律[J].地质与勘探,2011,47(06):994-1001.
[3] 管志宁.地磁场与磁力勘探[M].北京:地质出版社,2005.
[4] DZ/T 0071-93地面高精度磁测技术规程[S].中华人民共和国地质矿产部,1993.
[5] 牛永升.青海夏日哈北铁多金属矿地质特征及控矿因素分析[J].甘肃冶金,2016,38(02):90-97.