Lacustrine basin evolution and coal accumulation of the Middle Jurassic in the Saishiteng coalfield, northern Qaidam Basin, China
Lacustrine basin evolution and coal accumulation of the Middle Jurassic in the Saishiteng coalfield, northern Qaidam Basin, China
复制标题
柴达木盆地北部赛什腾煤田中侏罗世湖盆演化与煤炭富集
DOI：
10.1016/j.jop.2016.03.001
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Yong Hong Li
中科院分区：
文献类型：
--
作者：
Meng Li;Long Yi Shao;Lei Liu;Jing Lu;Baruch Spiro;Huai Jun Wen;Yong Hong Li
通过对柴达木盆地北部赛石腾煤田中侏罗世含煤层序的广泛钻孔调查，共识别出辫状河、曲流河、辫状河三角洲、曲流河三角洲和湖泊相等20种岩石类型和5种沉积相。岩石类型和沉积相的分布有助于重建赛石腾煤田中侏罗世三个时期的沉积相图，即大梅沟期、石门沟早期和石门沟晚期。这也为NQB中侏罗世三期沉积模式的建立提供了依据，表明NQB在大梅沟期和石门沟早期的湖盆对应于一个溢流盆地，而在石门沟晚期的NQB对应于一个平衡充填盆地。根据沉积相图对煤层稳定性和煤层结构的分析表明，大梅沟时代，赛石腾煤田的有利成煤相为下三角洲平原的三角洲间湾和分流间湾。特别是，在水下古隆起上发育的沼泽有利于厚煤层的发育。因此，在赛石腾煤田西部的平台古隆起一带也可以找到可开采的煤层。
Based on an extensive borehole survey of the Middle Jurassic coal-bearing sequences in the Saishiteng coalfield, northern Qaidam Basin (NQB), a total of 20 rock types and 5 sedimentary facies were identified, including braided river, meandering river, braided delta, meandering river delta, and lacustrine facies. The distribution of rock types and sedimentary facies contributed to the reconstruction of three periods' sedimentary facies maps of the Middle Jurassic in the Saishiteng coalfield, namely, the Dameigou age, the early Shimengou age and the late Shimengou age. That also provided the basis for the development of a three-stage depositional model of the Middle Jurassic in the NQB, indicating the lacustrine basin of the NQB in the Dameigou age and early Shimengou age were corresponding to an overfill basin, and that in the late Shimengou age was related to a balanced-fill basin. The analysis of the stability and structure of coal seams based on sedimentary facies maps showed that the preferred coal-forming facies in the Saishiteng coalfield were inter-delta bay and interdistributary bay of lower delta plain in the Dameigou age. In particular, the swamps that developed on the subaqueous palaeohigh favored the development of thick coal seams. Thus, minable coal seams may also be found along the Pingtai palaeohigh in the western part of the Saishiteng coalfield.
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DOI：
--
发表时间：
2009
期刊：
Coal Geology & Exploration
影响因子：
--
作者：
Gao Di
通讯作者：
Gao Di
影响因子：
--
作者：
Yang Yong
通讯作者：
Yang Yong
影响因子：
3.5
作者：
A. Carroll;K. Bohacs
通讯作者：
A. Carroll;K. Bohacs
DOI：
--
发表时间：
2005
期刊：
Chinese Geology
影响因子：
--
作者：
Yuan Wen-fang
通讯作者：
Yuan Wen-fang
DOI：
--
发表时间：
2007
期刊：
Journal of China Coal Society
影响因子：
--
作者：
J. Qi
通讯作者：
J. Qi