新疆准噶尔盆地早-中侏罗世层序-古地理及聚煤特征

在对准噶尔盆地早-中侏罗世含煤岩系进行层序地层分析的基础上，对聚煤期古地理特征及其与聚煤作用的关系进行研究。结果表明：该盆地早-中侏罗世含煤岩系形成于河流-三角洲-湖泊沉积体系，共发育3个三级层序，分别对应于八道湾组（J1b）、三工河组（J1s）及西山窑组（J2X）；准噶尔盆地从层序Ⅰ和层序Ⅲ，先后经历了沼泽化（层序Ⅰ）-湖化（层序Ⅱ）-沼泽化（层序Ⅲ）过程；在最大湖泛面附近的湖侵体系域末期和高位体系域早期，较快的可容空间增加速率与泥炭堆积速率相平衡，从而有利于厚煤层的聚集；该期成煤环境多样，层序Ⅰ和层序Ⅲ的河流泛滥平原沼泽、三角洲平原沼泽及滨浅湖中均有厚煤层形成，但尤以三角洲平原沼泽成煤最优...

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Bibliographic Details
Published in煤炭学报 no. 1; pp. 114 - 121
Main Author 王佟 田野 邵龙义 鲁静
Format Journal Article
LanguageChinese
Published 2013
Subjects
侏罗纪
准噶尔盆地
层序地层学
岩相古地理
聚煤作用
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Summary:在对准噶尔盆地早-中侏罗世含煤岩系进行层序地层分析的基础上，对聚煤期古地理特征及其与聚煤作用的关系进行研究。结果表明：该盆地早-中侏罗世含煤岩系形成于河流-三角洲-湖泊沉积体系，共发育3个三级层序，分别对应于八道湾组（J1b）、三工河组（J1s）及西山窑组（J2X）；准噶尔盆地从层序Ⅰ和层序Ⅲ，先后经历了沼泽化（层序Ⅰ）-湖化（层序Ⅱ）-沼泽化（层序Ⅲ）过程；在最大湖泛面附近的湖侵体系域末期和高位体系域早期，较快的可容空间增加速率与泥炭堆积速率相平衡，从而有利于厚煤层的聚集；该期成煤环境多样，层序Ⅰ和层序Ⅲ的河流泛滥平原沼泽、三角洲平原沼泽及滨浅湖中均有厚煤层形成，但尤以三角洲平原沼泽成煤最优。
Bibliography:Junggar Basin ; Jurassic ; lithofacies palaeogeography ; coal accumulation ; sequence stratigraphy
WANG Tong1＇2 ,TIAN Ye2＇3 ,SHAO Long-yi2 ,LU Jing2（ 1. China National Administration of Coal Geology, Bering 100039, China;Z College of Geosciences and Surveying Engineering, China University of Mining and Technology（ Beijing） ,Beijing 100083 ,China;3. Geological Publishing House,Beijing 100053 ,China）
Analysed the sequence stratigraphy and palaeogeography of the early and early middle Jurassic coal meas- ures in the Junggar Basin, northwestern China. The controls of the palaeogeography and sequence stratigraphy on the coal accumulation in this basin was discussed. The results show that, the coal measures were formed in a fluvial-delta- lacustrine sedimentary system, and a total of 3 third-order sequences were developed, corresponded to Badaowan For- mation（ Jib ）, Sangonghe Formation （J1s） and Xishanyao Formation （J2x）. The Junggar Basin had experienced the swamping （Sequence I）--lake flooding （Sequence II）--swamp
ISSN:0253-9993