广西热水沉积成矿作用的基本特征

详细叙述了广西热水沉积型矿床的成矿时代、空间分布和控矿环境，指出主要的矿产种类有锡、铅、锌、锑、汞、金、铜、钨、锰、铁、磷、重晶石及黄铁矿。其成矿时代为早元古代、晚元古代、早古生代、晚古生代及中生代，以泥盆纪为最重要的成矿时代；矿床在空间上主要分为桂北晚古生代裂陷锡-多金属成矿带及桂西南泥盆纪裂陷锰-重晶石-黄铁矿成矿带，次为桂东南早古生代裂陷铅-锌-多金属成矿带、桂中-桂北泥盆纪走滑断陷铅-锌-重晶石黄铁矿成矿带及桂西北早中三叠世裂陷金矿成矿带，此外还有桂北-桂东元古宙裂陷铁-锡-重晶石成矿带；控矿构造环境为裂谷构造，成矿受裂陷槽及区域性同沉积断裂控制；控矿沉积环境主要为台沟相带，次为局限-半局限台地相带、开阔台地相带、生物礁相带及海槽相带。并指出广西的热水沉积岩主要有硅质岩、电气石岩、层状矽卡岩及重晶石岩。

BASIC CHARACER OF HYDROTHERMAL DEPOSITIONAL MINERALIZATION IN GUANGXI

The paper narrates the ore forming era,special distribution and ore controlling environment of the hydrothermal deposition type of ore deposit in Guangxi in detail and points out that the main mineral resource species include tin,lead,zinc,antimony,Mercury,gold,copper,tungsten,manganese,iron,phosphorus,barite and pyrite. The metallogenic ages are the lower and upper Proterozoic Subera,late and earlier Palaeozoic Era,Mesozoic Era,with Devonian Period as an important metallogenic era. The special distribution of the deposit is mainly divided into later Palaeozoic fractural depression tin polymetallic ore zone of northern Guangxi and Devonian manganese-barite-pyrite ore zone in western Guangxi,and the less important earlier Palaeozoic fractural depression lead and zinc polymetallic ore zone in southeastern Guangxi,Devonian strike-slip fracture depression lead-zinc-barite pyrite ore zone in center Guangxi and earlier to middle Triassic fractural depression gold ore zone in northwestern Guangxi. Besides,there are also Proterozoic fractural depression iron-tin-barite ore zone in north and east Guangxi. The ore controlling tectonic environment is rift structure and ore is controlled by rift trough and regional synsedimentary fracture. The main ore controlling depositional environment is syneclise phase with the confined or semi-confined platform phase,open platform phase,organic reef phase and sea trough phase as the less important. It is pointed out that the main hydrothermal sedimentary rocks in Guangxi include silica rock,tourmaline rock,stratiform skarn and barite rock.