摘要
长江中下游地区中三叠统蒸发岩中,有石膏层、石盐假晶、"盐霜"和菱镁矿等,表明其原始古海水的浓度已达到石盐结晶阶段.当晚侏罗-早白垩世时,岩浆侵入作用于蒸发岩,从围岩-蒸发岩(T_2)中提供部分盐类物质是完全可能的,同时为内生铁铜矿床的形成创造了有利条件.
The evaporite beds of middle Triassie series contained gypsum beds, halite pseudocrystal, salt efflorescence and magnesite etc. in the middle-lower Yangtze valley. They are indicating that concentration of original palaeo-sea water reached order of halite crystalliziation.
During the Late Jurassic to Early Cretaceous epoch, magmatic intrusion were very active across evaporite beds. It's entirely possible that saline material iS supplied from country rocks to evaporite beds (T_2), simultaneously created favourable conditions for the endogenic copper and iron ores.
出处
《地质找矿论丛》
CAS
CSCD
1993年第1期95-99,共5页
Contributions to Geology and Mineral Resources Research
