辽宁葫芦岛安昌岘钼矿地质特征及找矿标志

GEOLOGICAL CHARACTERISTICS AND PROSPECTING INDICATORS OF THE ANCHANGXIAN MOLYBDENUM DEPOSIT IN HULUDAO CITY, LIAONING PROVINCE

安昌岘钼矿为隐伏矿床.矿体产于夕卡岩中,呈似层状、透镜体状大致平行分布.钼矿石中的金属矿物主要有辉钼矿,其次为黄铁矿、磁铁矿、黄铜矿、方铅矿、闪锌矿等.非金属矿物主要有石榴石、透辉石、符山石、透闪石、阳起石、石英.围岩蚀变类型主要有夕卡岩化、硅化、绿泥石化、绿帘石化、阳起石化.与成矿有关的蚀变主要为夕卡岩化.侏罗纪钢屯超单元花岗岩是主要含钼矿源岩.安昌岘钼矿属夕卡岩型钼矿床.

The Anehangxian molybdenum deposit is with concealed ore bodies roughly parallel distributed in skarn as stratoid and lenticular titans. The metal minerals in the ore include mainly molybdenite, fl^llowed by pyrite, magnetite, ehalcopyrite, galena and sphalerite. The nonmetallic minerals are dominated by garnet, diopside, idoerase, tremolite, actinolite and quartz. The main wall rock alterations involve skarnization, silicitication, chloritization, epidotization and actinolitization. Among those the skarnization is the major alteration related to mineralization. The granite of Jurassic Gangtun super unit is the main source for molybdenum ore. The Anchangxian molybdenum deposit belongs to skarn type.