摘要
文章通过选用高精度磁测剖面测量、激电中梯剖面测量、高精度重力剖面测量、可控源音频大地电磁测深等方法对青海省夏日哈木铜镍矿床开展地球物理方面的研究,探讨各种物探手段对该区矿床勘查的有效性及适用性,丰富区内物探资料,为区内同类型矿床勘查提供借鉴。研究表明,高精度磁测剖面测量在大范围寻找矿体较为有效,但难以表达矿体的形态特征;激电中梯剖面测量中极化率曲线能准确定位矿体的位置、显示矿体的规模,在一定程度上反映矿体的展布特征;高精度重力剖面测量中布格重力曲线与剩余异常曲线均能表现相对高异常,异常曲线在一定程度上反映矿体的位置及大致规模;可控源音频大地电磁测深方法对铜镍矿床进行勘查时,能较为准确地反映矿体的深部特征,尤其是反射系数图,能准确对深部盲矿体进行表达。
High precision magnetic survey profile measurement,IP intermediate gradient profile measurement,high precision gravity profile measurement and controllable source audio magneto telluric sounding survey are integratedly operated in Xiharihamu Cu-Ni deposit in Qinghai province to research on effectiveness and applicability of the above each geophysical techniques and provide data and references for prospecting similar ore deposits in the area.The results show that the high precision magnetic survey profile measurement is relatively effective for prospecting ore bodies in large area but can not display morphological feature of ore bodies.The Polarisability curve of IP intermediate profile measurement can be prepared to locate position of ore body and display it's size and the distribution feature to a certain extent.Both Bouguer gravity curve and residual anomaly curve of high precision gravity profile measurement show relatively high anomaly and the anomaly curve shows ore body position and it's size to a certain degree.For prospecting Cu-Ni deposit the controllable source audio magnetotelluric sounding technique can be prepared to reflect characteristics of deep ore body,especially the deep blind ore body can be accurately presented on the reflection coefficient map.
作者
王仔章
刘铭
WANG Zizhang;LIU Ming(The Henan 5th Research & Design Corporation of CNNC, Zhengzhou 450000, China;Shandong Lunan Institute of Geo-engineering Exploration, Jining 272000, Shandong, China;No.2 Geological Team, Shandong Geological Prospecting Bureau of Geology and Mineral Resources, Jining 272000, Shandong, China)
出处
《地质找矿论丛》
CAS
2022年第1期103-110,共8页
Contributions to Geology and Mineral Resources Research
基金
青海省地矿局项目(编号:201456)资助。
关键词
地球物理勘探
铜镍矿床
夏日哈木矿区
青海省
geophysical exploration
Cu-Ni deposit
Xiarihamu mining area
Qinghai province
