陕西勉略宁地区致矿地质异常场结构及找矿预测

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陕西勉略宁“三角区”构造块体呈楔状夹持在秦岭微板块、扬子陆块和松潘甘孜褶皱带之间,目前已探明多种矿产,成矿作用经历了自新太古代以来不同构造体制下的多次构造、岩浆热事件和变质变形的复杂地质作用,使致矿地质异常切结构复杂化,最新解译的TM遥感线环构造相当发育,走向上可以划分为4组,不同分布和组合的线、环形构造对矿床(点)的分布具有明显不同的控制作用,航磁场呈两带三个方向展布,主要特征为正负异常相随,北陡南缓,铜、金矿床(点)大多分布于正负磁异常的梯度带上,在不同的构造-岩层组合部位,地球化学异常组合具有明显的区别,是寻找不同类型矿床的重要依据,利用致矿地层-构造-物理-化学场组合标志和已知含矿单元的矿床原建立找矿有利度预测模型,对本区进行了新一轮的找矿远景划分,优选找矿靶区10个。 Triassic tectonic blocks in Mianlianning, Shaanxi are wedge-shaped sandwiched between Qinling microplate, Yangtze block and Songpan-Ganzi fold belt. Many mineral resources have been discovered at this time. The metallogenic process has been different since the Neo-Archean In the tectonic regime, multiple tectonics, magmatic events and metamorphic deformation complicate the geological processes, complicating the abnormal ore-cutting structure. The newly interpreted TM remote sensing wire loops are well developed and can be divided into four groups Distribution and combination of line and ring structure of the distribution of ore deposits (points) have distinctly different controls, aviation magnetic field was distributed in three directions with two belts, the main features of the positive and negative anomalies accompanied by north and south slow, copper, gold The orebodies (spots) are mostly distributed in the gradient bands of positive and negative magnetic anomalies. There are obvious differences in geochemical anomaly combinations at different tectonic-lithological assemblages, which is an important basis for finding different types of ore deposits. Using ore-bearing strata-tectono- Physical-chemical combination of signs and known ore-bearing units of ore deposits to establish the degree of prediction of the original ore prospecting, the region carried out a new round of ore prospecting division, the preferred prospecting target District 10.
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