地层  

STRATUM

作　　者：张竹如[1] 陈世桢[1] 

机构地区：[1]贵州工学院地质系

出　　处：《贵州工学院学报》1994年第3期14-19,共6页

基　　金：国家黄金局资助

摘　　要：研究区出露太古界胶东群中高级变质地层及中生界下白垩统莱阳群陆相碎屑岩及新生界第四系松散堆积。中生界下白垩统莱阳群在区内仅出露第一段（Ｋ１Ｌ１）及第二段（Ｋ１Ｌ２）。Ｋ１Ｌ１—含炭岩系，总厚度＞２７０ｍ，由黑色泥岩，细砾岩，砂岩，不纯碳酸盐岩组合，含有机质及硫高：下部含炭岩系（合矿层），Ｃ有机０．５８２％￣４．２２５％，Ｓ０．２８％～６．８１％；中部碎屑岩Ｃ有机０．０１５３％～０．０７５１％；上部含炭岩系（含矿层）Ｃ有机０．００７％￣３．５６％，Ｓ０．０３６％￣１６．７２％。该岩系为陆相湖泊基底还原相，接受古变质岩、混合岩花岗岩风化剥蚀产物沉积。Ｋ１Ｌ２—砾岩层（金矿化层位）。The researched region distributes middle-high grade metamorphic rock stratums of Jiao Dong group in Archaeozic erathem,continental factes calstic rock of Lai Yang group in the lower series of cretaceous system of Mesozaic erathem and loose deposits of Quaternary system in Kainozoic erathem.In the region at Lai Yang group only appear first member(K1L1)and second member(K 1 L 2).K1 L1-Carbonaceous rock series all thickness>270m,consist of black mudstone,fine conglomerate, sandstone.carbonate rock.It contains organic matter and high-sulphur. The lower part is carbonat rock series(ore-bearing bed).Organic-Carbon:0. 582%￣4. 225%, S: 0. 28%￣6.81%.The middle part is elastic rock Organic-carbon:0. 0153% ￣0. 0715%.The upper part is carbonaceous rock series (ore-bearing bed )organic-cabon: 0. 007%￣3. 56% S: 0. 036%￣ 16. 72% This rock SerieS belong to the reduction enironment of lake factes in continental facteS,it accepts the sedimentation of weathering product from metamorphic rock of land and migmatitic granite.K 1 L2-Conglomerate bed (gold mineralization bed ).

关 键 词：变质地层 含碳岩系 金矿化 太古代 胶东群 

分 类 号：P536[天文地球—古生物学与地层学]