摘要
准噶尔盆地南缘发育丰富的低阶煤炭资源。通过野外露头观测,岩心、钻井、测井资料分析,利用基准面旋回和可容纳空间的变化关系,采用岩相古地理等研究手段,揭示了准噶尔盆地南缘含煤岩系的层序结构、成煤环境及聚煤规律:区内含煤岩系由底到顶可划分为5个三级层序、15个体系域;各沉积体系内的沉积相、亚相、微相由山向盆呈有规律变化,其中的扇间洪泛平原沼泽、三角洲平原沼泽和滨湖沼泽是主要的成煤微环境;古地貌与古沉积环境决定了区内煤层的宏观分布和发育程度,而厚煤层主要发育于低位和高位体系域中。
The southern margin of Junggar basin is rich in low-rank coal resources.This paper reveals the sequence structure and coal-forming environment and coal accumulating regularities of the coal-bearing rock series in this area,through the outcrop observation and the core,drilling,logging data analyses,using the correlations between the base level cycle and accommodation space,by means of lithofacies paleogeographic researches,as follows： the coal-bearing rock series can be divided into five Class-III sequences and 15 system tracts from the bottom up;fan delta,delta and lake facies are the main sedimentary systems,and the sedimentary facies,subfacies and microfacies in each system show regular changes from the mountains to the basin,in which flood plain swamp,fan delta plain swamp and lakeshore swamp in inter-fan deltas are the major coal-forming microenvironments;the ancient landform and ancient sedimentary environment determine the macroscopic distribution and development degree of coal seams in the studied area,and thick coal seams are mainly developed in lowstand and highstand system tracts.
出处
《新疆石油地质》
CAS
CSCD
北大核心
2013年第4期386-389,共4页
Xinjiang Petroleum Geology
关键词
准噶尔盆地
南缘
含煤岩系
层序结构
成煤环境
聚煤规律
Junggar basin
southern margin
coal-bearing rock series
sequence structure
coal-forming environment
coal accumulating law
