菏泽地区含煤地层基准面旋回与成煤作用研究
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摘要
采用了地层学、沉积学、煤地质学等多学科相结合的方法,对菏泽地区晚古生代石炭—二叠系的高分辨率层序地层进行了基准面旋回划分,通过分析该地区基准面旋回变化特征,探讨了其与成煤作用的耦合机制。研究发现:菏泽地区石炭—二叠系沉积可以划分为2个超长期、5个长期、12个中期和30多个短期基准面旋回。通过对比整个菏泽含煤区高分辨率层序地层,总结出基准面旋回与成煤作用关系,发现LSC1中的17煤层、18煤层主要形成于障壁海岸环境之中,主要发育于基准面由快速上升转变为缓慢下降,为典型的水退成煤。LSC2中的16煤层是形成于潮坪环境之中,发育于基准面快速上升时期,为海侵事件成煤。LSC3旋回中的3煤层形成于陆表海浅水三角洲环境之中,发育于基准面由海平面快速上升到减缓上升然后转为缓慢下降,为典型的三角洲海退成煤。
By using multidisciplinary combination of stratigraphy,sedimentology and coal geology,base level cycle division has been carried out in late Paleozoic Carboniferous-Permian high resolution sequence stratigraphy in Heze area.Through analysis on variation characteristics of base level cycle,the coupling mechanism with the effects of the coal has been studied.It is found that the sedimentary deposits in Heze area can be divided into 2 super long period,5 long period,12 medium period and 30 short period base level cycles.Comparing high resolution sequence stratigraphy in coal-bearing areas in Heze city,the function relationship between base level cycle and coal has been summarized.It is found that No.17 and No.18 coal layer in the LSC1 cycle were mainly formed in the barrier coast environment in rapidly rising period to slow down period.The coal would be formed after the water retreated.No.16 coal layer in LSC2 cycle was formed in the tidal flat environment in rapid rising period.The coal was formed by transgression events.No.3 coal layer in LSC3 cycle was formed in the shallow water delta environment in the epicontinental sea in rapid rising sea period to slowing up and then to slowing down period.The coal was formed by typical delta regression.
By using multidisciplinary combination of stratigraphy,sedimentology and coal geology,base level cycle division has been carried out in late Paleozoic Carboniferous-Permian high resolution sequence stratigraphy in Heze area.Through analysis on variation characteristics of base level cycle,the coupling mechanism with the effects of the coal has been studied.It is found that the sedimentary deposits in Heze area can be divided into 2 super long period,5 long period,12 medium period and 30 short period base level cycles.Comparing high resolution sequence stratigraphy in coal-bearing areas in Heze city,the function relationship between base level cycle and coal has been summarized.It is found that No.17 and No.18 coal layer in the LSC1 cycle were mainly formed in the barrier coast environment in rapidly rising period to slow down period.The coal would be formed after the water retreated.No.16 coal layer in LSC2 cycle was formed in the tidal flat environment in rapid rising period.The coal was formed by transgression events.No.3 coal layer in LSC3 cycle was formed in the shallow water delta environment in the epicontinental sea in rapid rising sea period to slowing up and then to slowing down period.The coal was formed by typical delta regression.
引文
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[17]李增学,余继峰,郭建斌,等.陆表海盆地海侵事件成煤作用机制分析[J].沉积学报,2003,21(2):288-295.
[18]杨起,李宝芳,李祯.河南禹县煤田晚古生代煤系的沉积模式和聚煤特征[J].地球科学—武汉地质学院学报,1982,3(18):263-273.
[19]吕大炜,梁吉坡,李增学,等.单县矿区高分辨率层序地层及成煤作用研究[J].地球学报,2008,29(5):633-638.
[20]张义江,张增奇,单伟,等.单县煤田张集井田地质特征与成煤环境分析[J].山东国土资源,2010,26(7):4-7.
[21]张增奇,张义江,张尚坤,等.鲁西南隐伏区单县煤田曹县煤田的发现及其意义[J].山东国土资源,2008,24(1):3-6.
[2]邓宏文,王红亮,祝永军,等.高分辨率层序地层学——原理及应用[M].北京:地质出版社,2002:3-24.
[3]邓宏文.美国层序地层研究中的新学派——高分辨率层序地层学[J].石油与天然气地质,1995,16(2):90-97.
[4]陈世悦.刘焕杰.华北石炭二叠纪层序地层学研究的特点[J].岩相古地理,1994,14(5):11-19.
[5]程爱国,魏振岳.华北晚古生代聚煤盆地层序地层与聚煤作用关系的探讨[J].中国煤田地质,2001,13(2):7-9.
[6]李增学,魏久传,王明镇,等.华北南部晚古生代陆表海盆地层序地层格架与海平面变化[J].岩相古地理,1996,16(5):1-9.
[7]张增奇,张成基,王世进,等.山东省地层侵入岩构造单元划分对比意见[J].山东国土资源,2014,30(3):1-23.
[8]李宝芳,温显瑞,李贵东.华北石炭、二叠系高分辨率层序地层分析[J].地学前缘,1999,6(增):81-93.
[9]李增学,魏久传,魏振岱,等.含煤盆地层序地层学[M].北京:地质出版社,2000:207-225.
[10]陈世悦,徐凤银,刘涣杰.华北晚古生代层序地层与聚煤规律[M].东营:石油大学出版社,2000:83-102.
[11]陈钟惠,武法东,张守良,等.华北晚古生代含煤岩系的沉积环境和聚煤规律[M].武汉:中国地质大学出版社,1993:1-62.
[12]李增学,魏久传.华北陆表海盆地南部层序地层分析[M].北京:地质出版社,1998:81-109.
[13]邵龙义.含煤岩系层序地层分析的新认识-兼论河北南部晚古生代层序地层格架[J].中国矿业大学学报,1999,28(1):20-24.
[14]程保洲.山西晚古生代沉积环境与聚煤规律[M].太原:山西科学技术出版社,1992:9-15,
[15]陈世悦.华北石炭二叠纪海平面变化对聚煤作用的控制[J].煤田地质与勘探,2000,28(5):8-11.
[16]李增学,李守春,魏久传.事件性海侵与煤聚积规律——鲁西晚石炭世富煤单元的形成[J].岩相古地理,1995,15(1):1-8.
[17]李增学,余继峰,郭建斌,等.陆表海盆地海侵事件成煤作用机制分析[J].沉积学报,2003,21(2):288-295.
[18]杨起,李宝芳,李祯.河南禹县煤田晚古生代煤系的沉积模式和聚煤特征[J].地球科学—武汉地质学院学报,1982,3(18):263-273.
[19]吕大炜,梁吉坡,李增学,等.单县矿区高分辨率层序地层及成煤作用研究[J].地球学报,2008,29(5):633-638.
[20]张义江,张增奇,单伟,等.单县煤田张集井田地质特征与成煤环境分析[J].山东国土资源,2010,26(7):4-7.
[21]张增奇,张义江,张尚坤,等.鲁西南隐伏区单县煤田曹县煤田的发现及其意义[J].山东国土资源,2008,24(1):3-6.