鄂尔多斯盆地甘泉地区下侏罗统高分辨率层序地层学分析High-resolution sequence stratigraphy of Lower Jurassic in Ganquan area,Ordos Basin
陈辉,戴小平,王起琮,熊涛,王永东
CHEN Hui1,DAI Xiao-ping1,WANG Qi-cong2,XIONG Tao2,WANG Yong-dong2
摘要(Abstract)：
根据层序沉积时限以及基准面旋回界面识别标志,运用高分辨率层序地层学理论和方法,对鄂尔多斯盆地中南部甘泉地区下侏罗统进行了划分。识别出下侏罗统各级旋回层序界面,并将其划分为1个超长期、8个长期、32个中期、86个短期旋回层序。应用地层等时对比技术,以长期旋回层序为地层对比框架、中期旋回层序为地层对比单元,建立了研究区下侏罗统等时地层格架。下侏罗统沉积于盆地基底快速沉降、缓慢抬升的构造环境,在基底抬升速度周期性变化过程中,盆地边缘沉积了数层可采煤层,成为划分层序的重要依据。
The classification of high resolution sequence stratigraphy of Lower Jurassic in Ganquan area of Ordos Basin is discussed based on sequence deposition time and identification markers.According to interface types the Lower Jurassic sequences can be divided into 1 super-long-time base-level cycle sequence and 8 long time,32 middle long time,86 short time base-level cycle sequences.By using the technology of isochronous stratigraphic correlation of high resolution sequence stratigraphy the sequence framework is established with the framework of long time base-level cycle sequence and contrasting units of middle time baselevel cycle sequence.The Lower Jurassic in Ordos Basin formed while the basin base fast subsided then slowly uplifted and the coal seams accumulated at the basin margin,which are important evidence to recognize base-level cycle sequences.
关键词(KeyWords)：
高分辨率层序地层;下侏罗统;甘泉地区
high resolution sequence stratigraphy;Lower Jurassic;Ganquan area
基金项目(Foundation): 国家重点基础研究发展项目(2003CB214607);; 陕西省自然科学基础研究项目(2006z02)
作者(Author):
陈辉,戴小平,王起琮,熊涛,王永东
CHEN Hui1,DAI Xiao-ping1,WANG Qi-cong2,XIONG Tao2,WANG Yong-dong2
参考文献(References)：
- [1]何自新.鄂尔多斯盆地演化与油气[M].北京:石油工业出版社,2003.
- [2]李思田,程守田,杨士恭,等.鄂尔多斯盆地东北部层序地层及沉积体系分析[M].北京:地质出版社,1992:13-45.
- [3]郑荣才,彭军,吴朝容.陆相盆地基准面旋回的级次划分和研究意义[J].沉积学报,2001,19(2):249-254.
- [4]何自新,杨华,袁效奇,等.鄂尔多斯盆地地质剖面图集[M].北京:石油工业出版社,2004:319-422.
- [5]张泓,白清昭,张笑薇,等.鄂尔多斯聚煤盆地形成与演化[M].西安:陕西科学技术出版社,1995:121-136.
- [6]焦养泉,李思田,杨士恭.三角洲-湖泊沉积体系及聚煤作用研究—以鄂尔多斯盆地神木地区延安组Ⅱ单元为例[J].地球科学-中国地质大学学报,1992,17(2):114-121.
- [7]郑荣才,彭军.陕北志丹三角洲长6油层组高分辨率层序分析与等时对比[J].沉积学报,2002,20(1),92-10.
- [8]时志强,韩永林,赵俊兴,等.鄂尔多斯盆地中南部中侏罗世延安期沉积体系及岩相古地理演化[J].地球学报,2003,24(1):49-54.
- [9]赵廷周,崔永泉,赵忠良.陕西榆林侏罗系层序地层分析及意义[J].陕西地质,1996,14(1):27-41.
- [10]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):89-97.
- [11]邓宏文,王红亮,李熙吉吉等.层序地层地层基准面的识别、对比技术及应用[J].石油与天然气地质,1996,17(3):177-184.
文章评论(Comment)：
|
||||||||||||||||||
|
||||||||||||||||||