| PDF: | |
| Time: | 2010 |
| Journal: | Geological Science and Technology Information |
| Volumn: | 29 |
| Issue: | 2 |
| Pages: | 52-57 |
| Type: | Other |
| Author: | Xue Jiang,Rihui Cheng,Pujun Wang,Wanzhu Liu. |
Abstract: | On the basis of field outcrops and regional geological data,the paper analysed the deep-water deposits of Xidashan Formation of Early Cambrian in Kuruktag,Tarim Basin,in order to realize the sedimentary environment and sea level changes. It suggests that:(1) The genesis of the bedded siliceous rocks and gypsum of Xidashan Formation in north of Kuruktag should be related to volcanic activities and tectonic activities,while the nodular limestone is formed by compaction after being dissolved by current and sea water.(2) Xidashan Formation is a upward shallowing sedimentary sequence,whose sedimentary environment changed from bathyal environment to fore-platform slope. (3) Long-cycle sea-level changes background reflected by Xidashan Formation is from final stage of marine transgression to early stage of marine regression. |