摘要
矽卡岩型多金属矿受接触带、断裂及层间破碎带等构造控制,产于接触带的矽卡岩中,其目标体和围岩在磁性、电性等物理特征方面具有一定的差异,利用合适的物探方法追索矿体走向,推断矿体的空间赋存状态,为深部揭露提供依据。高精度磁测和激电中梯测量能够快速圈定目标体引起的磁电异常在地表的投影位置;四极测深法可了解极化体的空间赋存状态;利用不同极距的联合剖面法可确定极化体的倾向等。利用综合物探方法在青海省哈得尔甘南地区和阿日特克山地区寻找矽卡岩型多金属矿效果良好,在追索矽卡岩矿化带、确定目标体产状等方面发挥着重要作用。
The skarn type polymetallic deposit is controlled by contact zone,the fault and the interlayer fracture zone.It occurred in the skarn in the contact zone.The target body and the surrounding rock are different in terms of magnetic and electrical properties.By using appropriate geophysical methods,the strike of the ore body has been tracked,and spatial occurrence state of the ore bodies has been understood.It will provide a basis for the disclosure of the deep.High-precision magnetic measurement and the induced polarization method can quickly delineate the projection position in the surface of target body caused by magnetic anomaly.By using quadrupole sounding method,spacial occurrence state of polar body can be understood.By using different pole distance composite profiling method,the tendency of the polarized body can be determined.It has good application effect to find skarn type polymetallic ores in HaDer Gannan area and Altek mountain area in Qinghai province by means of comprehensive geophysical method.It will play an important role in searching skarn mineralization zone.
作者
周立国
ZHOU Liguo(No.8 Exploration Institute of Geology and Mineral Resources,Shandong,Rizhao 276826,Chin)
出处
《山东国土资源》
2018年第7期67-72,共6页
Shandong Land and Resources
基金
中国地质调查局项目(1212011121200)
山东省地质勘查项目(鲁勘字[2012]65号)资助
关键词
矽卡岩
高精度磁测
激发极化法
综合物探
Skarn
high precision magnetic measurement
induced polarization method
comprehensive geophysical prospecting
