古地理学报2011，Vol.13Issue(3)：317-324,8.
青海木里煤田外力哈达矿区侏罗系层序地层与聚煤作用
Sequence stratigraphy and coal accumulation of the Jurassic in Wailihada mining area of Muli Coalfield in Qinghai Province
徐晓燕 1邵龙义 1张发德 2黄曼 1鞠琪 2文怀军 2王文龙 1鲁静1
作者信息
- 1. 中国矿业大学(北京)资源与地球科学系,北京100083
- 2. 青海煤炭地质局,青海西宁810000
- 折叠
摘要
Abstract
Sequence stratigraphy and coal accumulation of the Jurassic lacustrine clastic coal measures in the Wailihada mining area of northeastern Qinghai were studied using borehole data. A total of 5 third-order sequences and corresponding systems tracts were subdivided. Within each sequence, the lowstand systems tract (LST) is composed of grayish white coarse-grained sandstones of fluvial or distributary channel facies, the transgressive systems tract (TST) consists of sandy mudstones of flood basin and interdistributary bay facies, and the highstand systems tract (HST) is dominated by the mudstone and carbonaceous mudstones of the lacustrine and interdistributary bay facies. Thick coal was formed in the middle stage of the TST of sequence S1, and no major coals were formed in the LST and HST. This is mainly due to a balanced development of accommodation space rates and peat accumulation rates during middle stage of the TST, when the interdistributary environments favored the accumulation of thick coals.关键词
木里煤田/层序地层/聚煤作用/侏罗系Key words
Muli Coalfield/ sequence stratigraphy/ coal accumulation， Jurassic分类
天文与地球科学引用本文复制引用
徐晓燕,邵龙义,张发德,黄曼,鞠琪,文怀军,王文龙,鲁静..青海木里煤田外力哈达矿区侏罗系层序地层与聚煤作用[J].古地理学报,2011,13(3):317-324,8.
