新疆东天山白鑫滩铜镍矿区物探500米以浅三维找矿模型建立及预测

Establishment and Prediction of Three-Dimensional Geophysical Prospecting Model with a Depth of 500 Meters in Baixintan Cu-Ni Deposit, East Tianshan, Xinjiang

摘要: 新疆东天山白鑫滩铜镍矿的发现拓展了东天山寻找铜镍矿的空间，但是由于地表覆盖厚，白鑫滩铜镍矿深部矿体空间变异较大，白鑫滩铜镍矿已查明深部矿体主要多分布在150米以浅，以往物探工作表明，地表盐碱壳对电法勘查屏蔽效应明显，导致物探工作未能有效的刻画矿体的深部空间展布形态，不利于深部找矿预测和进一步评级工作开展。本次研究通过物探方法试验，选取常规直流电法中对称四极测深，并进行井旁测深，选取特征点法判断0~−500米内铜镍矿体的分布形态，并建立三维物探模型，对未知及深部矿体进行预测，可以有效的指导白鑫滩铜镍矿进一步找矿方向，为白鑫滩一带分布的铜镍矿床勘查提供物探依据。

Abstract: The discovery of Baixintan copper nickel mine in East Tianshan, Xinjiang has expanded the space for searching for copper nickel mine in East Tianshan. However, due to the thick surface coverage, the spatial variation of the deep ore body of Baixintan copper nickel mine is large. It has been found that the deep ore body of Baixintan copper nickel mine is mainly distributed at a depth of less than 150 meters. Previous geophysical exploration work has shown that the shielding effect of surface saline alkali crust on electrical exploration is obvious. This leads to the failure of geophysical exploration to effectively describe the deep spatial distribution of ore bodies, which is not conducive to the development of deep prospecting prediction and further rating. Through the test of geophysical exploration method, this study selects the symmetrical quadrupole sounding in the conventional DC method, carries out the borehole sounding, selects the characteristic point method to judge the distribution form of copper nickel ore body within 0~500 m, and establishes a three-dimensional geophysical exploration model to predict the unknown and deep ore bodies, which can effectively guide the further prospecting direction of Baixintan copper nickel deposit and provide geophysical basis for the exploration of copper nickel deposits distributed in Baixintan area.