摘要
塔里木盆地巴什托区石炭系自下而上分别为巴楚组、卡拉沙依组和小海子组。岩石类型有碎屑岩和碳酸盐岩,并夹薄层膏岩。沉积相主要为碳酸盐台地,包括蒸发台地、局限台地、开阔台地3种亚相和6种微相;巴楚期晚期,物源向北或北东方向退却,陆源碎屑物质注入急剧减少,形成了一套富含生物碎屑的碳酸盐岩地层,发育了局限台地亚相沉积;卡拉沙依期早中期为蒸发台地夹局限台地亚相沉积,晚期为局限台地环境;小海子期海侵范围扩大,大部分地区为开阔台地亚相沉积。
The Carboniferous in Bashituo block of Tarim basin is divided into Bachu formation,Karrathayi formation and Xiaohaizi formation,with rock types of clastic rock,carbonate rock and laminated gypsolyte.The sedimentary facies is dominated by carbonate platform which includes three sub-facies of evaporation platform,restricted platform,open platform and six micro-facies.In the late Bachu the source area was retrograded towards north and northeast direction,and the terrigenous clastics trended towards rapid decrease,forming a set of bioclastic-enriched carbonate strata-restricted platform sub-facies deposit.The early-middle Karrathayi belongs to evaporation platform mixed with restricted platform sub-facies deposit,and the late Karrathayi to restricted platform environment.Xiaohaizi period was featured with open platform sub-facies deposit by the enlarging of transgression.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2011年第1期42-44,共3页
Xinjiang Petroleum Geology
