山东五莲七宝山地区长老庄隐爆角砾岩带特征及意义

Characteristics and Significance of Changlaozhuang Hidden Explosion Breccia Belt in Qibaoshan Area in Wulian County in Shandong Province

摘要:

七宝山金铜矿位于胶莱盆地西南缘的七宝山地区，在金铜矿外围新发现长老庄含矿隐爆角砾岩带一条， 物探解译工作初步查明了该隐爆角砾岩带地质及地球物理特征：位于激电中梯高阻和低阻接触带上，深部呈低阻、中高激化异常。经钻探验证，在深部发现高品位的银铜铅矿体，矿石中粗粒方铅矿、黄铜矿结晶体肉眼可见，呈团块状富集，铜品位0.493%～5.125%，铅品位0.245%～6.606%，银品位55.2～547.1g/t。表明在金铜矿外围及深部仍具有寻找隐爆角砾岩型高品位银铜铅矿体的潜力。

Abstract:

Qibaoshan gold copper depsot is located in Qibaoshan area in the southwest edge of Jiaolai basin. Changlaozhuang ore-bearing cryptoexplosive breccia belt has been newly discovered in the surrounding areas of the gold copper deposit. The geophysical interpretation work has preliminarily identified geological and geophysical characteristics of the cryptoexplosive breccia belt. It is located in the high resistance and low resistance contact zone of IP ladder, and the deep part presents low resistance and medium-high intensity anomaly. Through drilling verification, high grade silver copper lead ore bodies have been found in the deep. The coarse galena and chalcopyrite crystals in the ores are visible to the eye and are concentrated in lumps. The copper grade is 0.493%～5.125%, the lead grade is 0.245%～6.606%, and the silver grade is 55.2～547.1g/t. It is showed that there is still potential to search for high grade Ag, Cu and Pb ore bodies of cryptoexplosive breccia type in the surrounding areas and deep of gold and copper deposits.