| 塔南凹陷层序地层格架与沉积体系分布 |
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| 引用本文： | 杨勉,孙文峰,陈艳丽.塔南凹陷层序地层格架与沉积体系分布[J].地质科学,2011,46(4):973-982. |
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| 作者姓名： | 杨勉 孙文峰 陈艳丽 |
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| 作者单位： | 东北石油大学地球科学学院 黑龙江大庆 163318 |
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| 摘 要： | 本文在塔南凹陷地层重新划分对比和统一层位的基础上,利用塔南凹陷地震资料和钻/测井资料,并综合考虑构造运动演化特征、古生物资料及地球化学资料,将下白垩统划分为3个一级层序、4个二级层序和6个三级层序.各级层序中可识别出冲积扇体系、扇三角洲体系、辫状河三角洲、曲流河三角洲体系、浊积扇及湖泊等几种主要的沉积体系类型.冲积扇体...
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| 关 键 词： | 塔南凹陷 下白垩统 层序地层 沉积体系 |
| 收稿时间： | 2011-05-31 |
Sequence stratigraphic frameworks and depositional system distribution of Tanan depression |
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| Yang Mian,Sun Wenfeng,Chen Yanli.Sequence stratigraphic frameworks and depositional system distribution of Tanan depression[J].Chinese Journal of Geology,2011,46(4):973-982. |
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| Authors: | Yang Mian Sun Wenfeng Chen Yanli |
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| Institution: | Earth Sciences Institute, Northeast Petroleum University, Daqing, Heilongjiang 163318 |
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| Abstract: | Based on stratigraphic re division and re correlation of Tanan depression，its lower cretaceous can be divided into 3 first order sequences， 4 second order sequences and 6 third order sequences according to seismic data，drilling data，logging data，paleontological data，geochemical data，and tectonic evolution characteristics.There are 6 main sedimentary systems in all sequences，such as alluvial system，fan delta system，braided river delta system，meandering river delta system，turbidite fan system and lacustrine system.Alluvial system is now found primarily in SQ1，whereas fan delta system primarily in SQ1 to SQ2，braided river delta system primarily in SQ3～SQ5，meandering river delta system primarily in SQ6，turbidite fan system primarily in SQ4 and lacustrine system in all 3 first order sequences.Sedimentary systems evolution is under control by palaeogeomorphology formed during Tanan depression tectonic evolution.Small lake basins filling at intermountain remnant basin stage formed SQ1，and SQ2～SQ3 formed in broad and gentle palaeogeomorphology environment at passive rift stage，SQ4 formed under complex small faulted lake basins background at initial active rift stage，whereas SQ5～SQ6 formed in wide basin with deepwater environment at stage of faulted basin transform to depression. |
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