河南支建铝土矿矿床地质特征研究

Study on the Geological Characters of the Zhijian Bauxite Ore Deposit in Hena Province

支建铝土矿位于三门峡-新安铝土矿成矿带上。通过对该矿床的地质勘探及综合研究认为,铝土矿赋存于石炭系上统本溪组中上部,含铝岩系具三个沉积旋回、四种岩性组合类型,浅部矿体为溶斗状,厚度变化明显,溶斗之间仅有极薄的铝土矿层相连,向深部变为似层状矿体,厚度较稳定。支建铝土矿形成于石炭纪大规模海进期内的短期海水退缩阶段。该铝土矿的沉积主要为一种高密度的碎屑流沉积体,属沉积型矿床。

Zhijian bauxite district is located in Shanmenxia-Xinan bauxite mineralization belt, Through geological exploration and comprehensive research on the deposit, it is suggesed that the bauxite ore is in the top of Benxi Fm. Carboniferous System. The bauxite-bearing rock series have 3 sedimentary cycle and 4 lithology association type. The shllow ore bodies have funnel forms, their thickness change obviously. The funnels linked only by a very thin bauxite ore bed. And the thin bed change into thick stratified-like orebody, and the thickness is very stable. Zhijian bauxite deposit formed in the short regression period during the big scale seawater progression stage in Carboniferous. The sediment of bauxite is a kind of high density detrital fluid sediment, the deposit belongs to sedimentary type.