| 洪浩尔舒特凹陷下白垩统近岸水下扇沉积特征 |
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| 引用本文： | 王星星,朱筱敏,张明君,潘荣,吴陈冰洁,张久强.洪浩尔舒特凹陷下白垩统近岸水下扇沉积特征[J].沉积学报,2015,33(3):568-577. |
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| 作者姓名： | 王星星 朱筱敏 张明君 潘荣 吴陈冰洁 张久强 |
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| 作者单位： | 1.油气资源与探测国家重点实验室 北京 102249; |
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| 基金项目： | 国家重大油气专项子课题，国家自然科学基金青年科学基金，教育部高等学校博士学科点专项科研基金(新教师类)，中国石油大学(北京)科研基金 |
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| 摘 要： | 通过对岩芯、录井、测井及地震等资料的综合分析, 明确了洪浩尔舒特凹陷陡坡带下白垩统近岸水下扇的沉积序列、展布特征、演化规律及扇体发育的控制因素。本区近岸水下扇可被划分为内扇、中扇及外扇三个亚相, 主要发育具块状层理、递变层理的碎屑支撑中、细砾岩, 具鲍马序列的浊积岩以及具滑塌构造的滑塌岩, 另可见到震积岩。扇体自早白垩世阿尔善组沉积晚期开始发育, 至腾一段时期规模达到最大且向北东迁移3.5 km左右;腾二段时期构造活动减弱, 湖盆开始萎缩, 扇体规模随之缩小, 且至腾二段末期扇体逐渐向扇三角洲沉积过渡。近岸水下扇的沉积特征及其分布演化规律主要受控于该区多期强烈的构造活动和潮湿炎热的古气候因素。陡坡带发育的板式边界断层, 断面陡峭平直、活动剧烈, 为近岸水下扇的发育提供了有利的构造背景。
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| 关 键 词： | 近岸水下扇 沉积特征 控制因素 下白垩统 洪浩尔舒特凹陷 |
| 收稿时间： | 2014-05-05 |
Sedimentary Characteristics of Near-shore Subaqueous Fans of the Lower Cretaceous in the Honghaoershute Depression |
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| WANG XingXing
,
ZHU XiaoMin
,
ZHANG MingJun
,
PAN Rong
,
WU CHEN BingJie
,
ZHANG JiuQiang.Sedimentary Characteristics of Near-shore Subaqueous Fans of the Lower Cretaceous in the Honghaoershute Depression[J].Acta Sedimentologica Sinica,2015,33(3):568-577. |
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| Authors: | WANG XingXing ZHU XiaoMin ZHANG MingJun PAN Rong WU CHEN BingJie ZHANG JiuQiang |
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| Institution: | 1.State Key Laboratory of Petroleum Resources and Prospecting (China University of Petroleum), Beijing 102249;2.College of Natural Source and Information Technology, China University of Petroleum, Beijing 102249;3.Research Institute of Petroleum Exploration and Development, Liaohe Oilfield, Panjin, Liaoning 124000;4.Huabei Oilfield Company, PetroChina, Renqiu, Hebei 062552 |
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| Abstract: | The sedimentary characteristics, distribution characteristics, evolution laws and the controlling factors of the development of the Lower Cretaceous near-shore subaqueous fan, located in the steep slope of the Eastern Honghaoershute depression, were defined clearly based on the integrated information including cores, well-logging, logging and seismic data. The results show that three kinds of sub-facies, including upper fan, mid-fan and lower fan, can be identified in the nearshore subaqueous fan in the study area, the glutenite deposition is the most important deposition, including massive or grading middle-fine clast-supported conglomerate, turbidite bearing Bouma Sequence and slumps with slump structures. Besides, we also can find some seismite deposition. In the study area, the subaqueous fan began to develop from the upper part of the Aershan Formation, and it became the largest and shifted towards the north-east at the lower part of Tengger Formation by 3.5 km, however, the scale of the fan in the upper part of the Tengger Formation began to reduce with the weak of the tectonic activities and the shrink age of the basin and then the subaqueous fan became gradually changing into fan-delta deposition. The sedimentary characteristics, distribution and evolution laws were controlled by the multiple-staged tectonic activities and the palaeo-climates, which was hot and humid. The plate type boundary fault which is steep and active provides the favorable tectonic setting for the development of the near-shore subaqueous fans in the steep slope. |
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| Keywords: | near-shore subaqueous fan sedimentary characteristics controlling factors Lower Cretaceous Honghaoershute depression |
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