论玄武岩金矿的地质特征

滇黔桂金三角区内一些产于峨眉山玄武岩组(含底部大厂层)和龙潭组内的金矿,其含矿岩性主要是玄武熔岩、凝灰岩和含凝灰质、碳质的粉砂岩、页岩．一些学者将它们都归入“卡林型金矿”．但因为地幔柱成因的玄武岩,自有其独立的成矿系列,包含Cu、Fe、Mn、Au、Pt、Pd、Co、Pb、Zn、Sb、CaF2、FeS2等多种矿产,在不同地区,其矿化各有侧重．可以看到金的矿集区都在铜的矿集区之南,且以玄武岩喷溢早期(大厂层)更富金,应命名为玄武岩金矿．晚期(龙潭组)更富铜为特色(玄武岩铜矿)．在共同具备含金(P2β2-1)、含铜(P21)有利地层与有利构造区内,发现卡林型金矿后,应着重探索玄武岩金矿,反之亦然．

GEOLOGICAL CHARACTERISTICS OF BASALT GOLD DEPOSIT

Located in Emeishan basalt group and longtan group of Yunnan-Hubei-Guangxi trigonum, main lithology of the gold deposit are basaltic lava, tuff, carbonaceous and tuffaceous sandstone and siltstone. It was attributed into Carlin-type gold deposit by some scholars. But the basalt came from mantle plume has its Independent rock series, which include minerals such as Cu、Fe、Mn、Au、Pt、Pd、Co、Pb、Zn、Sb、CaF2、FeS2,etc. In different areas, the mineralization emphases are different. Gold mines collection is located in the south of the Cu mines collection. The gold enriched in the early of the basalt effusion, while the Cu enriched in the later of that. So it is named basalt gold deposit. In the favorite strata and structures of the Au and Cu, after Carlin-type gold deposit was found, the basalt gold deposit should be stressed prospected.