| 合肥盆地白垩纪层序地层格架、沉积体系配置及演化 |
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| 引用本文： | 唐洪三,张勇,任凤楼.合肥盆地白垩纪层序地层格架、沉积体系配置及演化[J].沉积学报,2008,26(6):982-993. |
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| 作者姓名： | 唐洪三 张勇 任凤楼 |
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| 作者单位： | 中国石油化工股份有限公司胜利油田分公司地质科学研究院 |
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| 基金项目： | 中国石油化工股份有限公司重大油气勘探项目
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| 摘 要： | 合肥盆地的白垩系是叠置在侏罗纪前陆盆地上的断陷构造层，其层序地层及沉积演化研究是油气勘探的重要环节。综合应用横跨盆地二维地震剖面、测井、岩芯、露头及其它分析化验资料，对合肥盆地白垩纪的地层进行了层序地层界面的识别、划分，建立了该期地层格架。共划分出一级层序:构造层序界面（构造层序）界面2个:SBK1(TK1)、SBE(TE)；二级层序（层序组）界面1个:SBK2(TK2)；三级层序（层序）界面4个:SBK11(TK11)、SBK12(TK12)、SBK13(TK13)、SBK21(TK21)。在此基础上建立了合肥盆地白垩纪层序地层格架及沉积演化阶段:早白垩世层序组（包括朱巷组和响导铺组层序组）:为西缓超东陡深的不对称箕状断陷格局，西南部和北西部各发育一个大型冲积扇—冲积平原—三角洲平原带，西南部冲积扇—冲积平原大部分已经被剥蚀殆尽；东部和东北部发育一系列扇三角洲构成扇三角洲平原（裙），两者之间为滨浅湖—半深湖—深湖。晚白垩世层序组(张桥组层序组):北断南超的格局占主导，早白垩世时期的大型三角洲体系域已经不复存在，代之而起的是北部发育较大规模的扇三角洲平原；而南部或西南部冲积扇—冲积平原—三角洲平原带已经大为缩小到信阳—舒城断裂北缘。
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| 关 键 词： | 合肥盆地 白垩纪 层序地层 朱巷组 响导铺组 张桥组 |
| 收稿时间： | 1900-01-01 |
Framework of Sequence Stratigraphy , Sedimentary System and Evolution of Cretaceous Hefei Basin |
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| TANG Hong-san,ZHANG Yong,REN Feng-lou.Framework of Sequence Stratigraphy , Sedimentary System and Evolution of Cretaceous Hefei Basin[J].Acta Sedimentologica Sinica,2008,26(6):982-993. |
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| Authors: | TANG Hong-san ZHANG Yong REN Feng-lou |
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| Institution: | Instititute of Geological Science, Shengli Oilfield Branch, SINOPEC, DongyingShandong 257015 |
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| Abstract: | According to seismic, well logs, outcrop & cores data, we identified sequence stratigraphy boundarys. Cretaceous Paleogene strata can be recognized as 3 first order sequence, 1 second order sequences and 4 third order sequences. Based on the principle of base level cycles，the author distinguished & established sequence stratigraphy framework, sedimentary system setting & evolution in Cretaceous Paleogene.That is: 1) Early Cretaceous sequence series(Zhuxiang & Xiangdaopu Formations): a semi graben basin which onlapped in the west & faulted in the east, developed great scale alluvial fan alluvial plain delta plain on the western northern & western southern respecially. On eastern & eastern northern growth aseries fan deltas & shore semideep deep lacustrine. 2) Late Cretaceous sequence series(Zhangqiao Formation): similar with Early Cretaceous basically,buta semi graben basin which onlapped in the south & faulted in the north more salience.3) Paleogene Sequence series(Dingyuan Formation): The north of Feizhong fault uplift since tectonic movement so that bisect the basin, Dingyuan depression on the north and Shucheng depression on the south. |
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| Keywords: | Hefei Basin Cretaceous sequence stratigraphy Zhuxiang Formation Xiangdaopu Formation Zhangqiao Formation |
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