摘要
砂宝斯金矿产于中侏罗统陆相碎屑岩中 ,有 6条矿化带 ,走向近 SN,矿带间距 2 0 0～ 4 0 0 m。矿石类型主要为蚀变砂岩和构造破碎蚀变岩型。矿化与硅化 -黄铁矿化带关系密切。矿床可化分为4个成矿期、 6个成矿阶段。矿带受断裂构造控制 ,硫同位素研究表明 ,部分成矿物质来源于深部 ,由岩浆活动带出 ,侵入岩参与了成矿作用。根据研究区内已发现的 6处金水系沉积物异常 (异常值高者达 2 0 .3× 10 -9)以及区域构造、岩浆活动特征 ,预测矿区内应以 、 号矿体为主 ,在矿体深部及矿区南部寻找隐伏矿体 ;矿区外围宜在有利的基底构造、中侏罗统地层及其与岩体的内外接触带寻找破碎蚀变岩型和石英脉型金矿。
Shabaosi gold deposit occurrs in Middle Jurassic limnic clastic rocks. It includes six mineralized belts with about NS trending, and the distance between the belts is 200~400 m. The ore types are mainly altered sandstone and tectonoclastic altered rock. Gold mineralization is closely related to the silicated pyritization belt. The deposit can be divided into four metallogenic epochs and seven metallogenic stages. The ore belt is controlled by faults and the study of sulfur isotope indicates that part of metallogenic materials are from the depth with magmatic activity. The intrusive rocks paticipate in the mineralization and provide part of metallogenic materials. Based on six discovered gold stream sediment anomalies in the research area (anomaly value is up to 20 3×10 -9 ), and the characteristics of regional structure, magmatic activity, it is predicted that Ⅱ and Ⅲ orebodies are the main, and the buried orebody and blind orebody should be seeked in the depth of orebodies and south of mining area. In the peripheral mining area, the clastic altered and quartz vein types of gold deposit should be seeked in the favorable basement structures, Middle Jurassic strata and their inner/outer contact zones with the rock body.
出处
《黄金地质》
2000年第4期28-32,共5页
Gold Geology
