摘要
塔中地区石炭系“生屑灰岩”段是沉积于浅水克拉通内助陷盆地碎屑岩一碳酸盐岩旋回层中的碳酸盐岩。由于这种沉积盆地具有水浅和底平的特点，控制沉积的水动力条件主要是潮汐作用，沉积相带模式类似于陆表海碳酸盐潮汐作用模式。另外，海平面的略微升降变化即可导致大面积碳酸盐台地的淹没与出露，因此，米级旋回非常发育。这种米级旋回层表明了碳酸盐异旋回的特点，被认为是受米兰科维奇驱动力的控制。一个米级旋回的顶部所出现的沉积间断短期暴露是针孔状溶孔形成的主要机制。
The carboniferous bioclastic limestone member in Tazhong area(central Tarim basin) is carbonate rocks of carbonate-clastic cycles deposited in shallow-water intracratonic depressional basin. Due to the shallowwater and flat bottom in this basin, tide is the main hydrodynamic condition controlling deposition. Its model of sedimentary factes is similar to that of tidal action in the epeiric sea carbonate deposit. In addition, a slight change in sea level results in broadly submerging or exposing of carbonate platform, intensively developing meter-scale cycles which show the character of carbonate allocyclicity which is considered as a result of Milankovitch driving force. The short exposure of sedimentary intervals at the top of a meter-scale cycle is the primary mechanism for forming acicular-dissolved holes in this region.
出处
《石油勘探与开发》
EI
CAS
CSCD
北大核心
1996年第2期27-31,共5页
Petroleum Exploration and Development
关键词
浅水环境
碳酸盐岩
沉积特征
潮汐
塔里木盆地
Shallow water environment, Rhythmic layering, Carbonate rock, Depositional feature,Tide, Tarim basin
