河南省桐柏县老湾金矿地球化学特征及深部成矿预测

张宏燕, 赵焕, 郭鹏

Geochemical characteristics and deep metallogenic prediction of the Laowan gold belt in Tongbai County, Henan Province

ZHANG Hong-Yan, ZHAO Huan, GUO Peng

图2 老湾金矿区矿石类型 a—发育多金属硫化物的烟灰色石英脉,切穿早期Ⅰ阶段乳白色石英脉; b—Ⅱ阶段中粗-细粒自行-它形黄铁矿Py2、黄铜矿与灰白色石英胶结,呈浸染构造;c—Ⅰ阶段灰白色石英中发育粗粒自形-半自形黄铁矿Py1,呈星点状分布;d—斜长角闪片岩型金矿石中细粒方铅矿呈团块状沿灰白色石英脉发育

Fig.2 Ore type of Laowan gold deposit a—smoke gray quartz veins develop polymetallic sulfides, and the early stage I milky white quartz veins are cut through;b—in stage II, coarse-fine-grained self-isoform pyrite Py2, chalcopyrite and grayish-white quartz are cemented to form an impregnated structure;c—in the grayish-white quartz of stage I, coarse-grained autotrophic-semi-autotrophic pyrite Py1 was developed and distributed in a star-like pattern;d—fine-grained galena develops in clumps along grayish-white quartz veins in the orthorhombic diorist gold ore