| 浅析准噶尔盆地侏罗系煤层在层序地层中的意义 |
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| 引用本文： | 刘豪,王英民,王媛.浅析准噶尔盆地侏罗系煤层在层序地层中的意义[J].沉积学报,2002,20(2):197-202. |
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| 作者姓名： | 刘豪 王英民 王媛 |
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| 作者单位： | 石油大学盆地中心 北京 102249 |
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| 摘 要： | 准噶尔盆地侏罗系主要发育了三套煤层组合,分别位于八道湾组下段、八道湾组上段下部和西山窑组底部。在准噶尔盆地侏罗系层序地层学划分的方案中sb1、sb2、sb4界面则分别位于八道湾组下段、八道湾组上段下部和西山窑组底部三套煤层组合附近。由于在不同层序的不同体系域及同一体系域的不同时期可供煤层堆积所需要的可容空问和容纳快速堆积的煤层 (泥炭 )的发育程度以及沉积环境的不同,其聚煤情况也有较大差异,因而准噶尔盆地侏罗系煤层具有穿时现象,在层序的各个体系域中都有可能发育。经分析发现侏罗系煤层主要发育于 :⑴层序I的低位和高位域;⑵层序II的低位域;⑶层序III的高位域和 (4)局部发育于层序IV的低位域
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| 关 键 词： | 准噶尔盆地 侏罗系 煤层 层序地层学 |
| 文章编号： | 1000-0550(2002)02-0197-06 |
| 收稿时间： | 2001-06-04 |
| 修稿时间： | 2001年6月4日 |
Analyses of the Significances of Jurassic Coal Layers in Sequence Stratigraphy in Junggar Basin |
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| LIU Hao,WANG Ying-min,WANG Yuan.Analyses of the Significances of Jurassic Coal Layers in Sequence Stratigraphy in Junggar Basin[J].Acta Sedimentologica Sinica,2002,20(2):197-202. |
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| Authors: | LIU Hao WANG Ying-min WANG Yuan |
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| Institution: | The Petroleum University of Beijing,Basin and Oil Research Center,Beijing 102249 |
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| Abstract: | Mainly three sets of coal layer assembles developed in Junggar Basin Jurassic strata, respectively lying in the lower section of Badaowan group,the down part of the upper section of Badaowan group and the bottom of Xishanyao group.In the division proposal of the Jurassic sequence stratigraphy of Junggar Basin,sb1,sb2,sb4 boundaries lay in the lower section of Badaowan group,the down part of the upper section of Badaowan group and close to the three coal layer assembles at the bottom of Xishanyao group. The accumulation of coal varies greatly due to the differences in required accommodation which supplies space for coal accumulation in different system tracts of different sequences as well as in different periods of the identical system tract,and the differences in coal layer developments which accommodate quick accumulation,with the differences in sedimentary environments.Thus there are time-penetrating phenomena in the Jurassic coal layers, and they may develop in each system tract of the sequence.Therefore,the Jurassic coal layers mainly developed in (1)the lowstand and highstand system tracts of sequence Ⅰ.(2)the lowstand system tract of sequence Ⅱ.(3)the highstand system tract of sequence Ⅲ.(4)the lowstand system tract of sequence Ⅳ locally. |
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| Keywords: | Junggar Basin coal layer Jurassic sequence stratigraphy |
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