营口东部区含硼蚀变岩带特征及找矿方向

营口东部区是我国硼矿重要产区之一。硼矿体主要赋存于晚元古代辽河群里尔峪岩组的下部，受层位控制。含硼蚀变岩带长１４ｋｍ，宽８～６９ｍ，硼矿体产于蚀变岩带中下部的镁橄岩中。背形向斜、向形背斜核部是硼矿富矿体成矿最有利地段，古浅海含硼碳酸岩凹陷盆地中心是硼矿成矿的最佳古地理环境。背形向斜、向形背斜核部的含硼镁橄岩是硼矿体及隐伏硼矿体的主要找矿部位。

FEATURES OF BORON BEARING ALTERATION ZONE AND ORE PROSPECTING DIRECTION OF BORON DEPOSIT IN EAST YINGKOU

East Yingkou area is one of important localities of boron deposits in China. The boron deposit in East Yingkou area mainly occurred in the febrics of lower Lieryu F.,Liaohe Group of Late Proterozoic, strictly controlled by stratohorizon. There is a boron bearing alteration zone with 14m in length and 8 69m in width. The boron orebodies occurred in forsterite rocks in the middle and lower alteration zone,in which the cores of antiformal synclines or synform anticlines are the best favorite location for the forming of boron shoots, and the centers of a depression basin of boron bearing carbonate in palaeo shallow sea is the best palaeo geographical environment for the forming of boron deposits.So the core of an antiformal syncline or a synformal anticline is the major ore prospecting location of boron orebodies and buried boron orebodies.