中国南海北部珠江口盆地早渐新世末破裂不整合特征及其地质意义

doi:10.11743/ogg20190414

石油与天然气地质 ›› 2019, Vol. 40 ›› Issue (4): 851-863.doi: 10.11743/ogg20190414

中国南海北部珠江口盆地早渐新世末破裂不整合特征及其地质意义

宫越¹, 林畅松^1,2, 何敏³, 张忠涛³, 张博³, 舒梁峰³, 冯轩³, 洪芳浩¹

1. 中国地质大学(北京) 能源学院, 北京 100083;
2. 中国地质大学(北京) 海洋学院, 北京 100083;
3. 中国海洋石油深圳分公司石油勘探开发研究院, 广东深圳 518000

收稿日期:2018-10-23 修回日期:2019-01-15 出版日期:2019-08-28 发布日期:2019-06-01
通讯作者: 林畅松(1958-),男,教授、博士生导师,沉积地质与盆地分析。E-mail:Lincs@cugb.edu.cn。 E-mail:Lincs@cugb.edu.cn
作者简介:宫越(1991-),女,博士研究生,盆地分析和沉积地质。E-mail:15845804285@163.com。
基金资助:
国家自然科学基金项目（91328201，91328301）；中国地质大学（北京）基本科研业务费专项资金资助项目（2-9-2016-132）。

Characteristics and geological significance of unconformities at the late Early Oligocene in the Pearl River Mouth Basin, northern South China Sea

Gong Yue¹, Lin Changsong^1,2, He Min³, Zhang Zhongtao³, Zhang Bo³, Shu Liangfeng³, Feng Xuan³, Hong Fanghao¹

1. School of Energy Resources, China University of Geosciences(Beijing), Beijing 100083, China;
2. School of Ocean Sciences, China University of Geosciences(Beijing), Beijing 100083, China;
3. Research Institute of Petroleum Exploration and Development of Shenzhen Branch Company Ltd., CNOOC, Shenzhen, Guangdong 518000, China

Received:2018-10-23 Revised:2019-01-15 Online:2019-08-28 Published:2019-06-01

摘要/Abstract

摘要： 珠江口盆地破裂不整合（T₇）是南海北部边缘海盆地内一系列重要不整合界面之一，界面上下的物源与沉积环境等都有显著变化，其形成与盆地的动力学演化、海平面变化及油气聚集具有密切的联系。本研究依托地震数据和井资料，对研究区早渐新世末期T₇（32~30 Ma）不整合的分布与结构特征，以及不整合分布进行了描述，对破裂不整合形成机制以及其体现的盆地演化过程进行了探讨。研究表明，研究区T₇界面是具有破裂不整合面的明显特征，大部分断裂在T₇终止活动，或经过T₇界面后断距大幅度减小；而不整合面下伏的恩平组整体呈楔状，地层厚度明显受控于断裂活动。T₇不整合在珠江口盆地范围内的分布划分为3个区带，分别是北部的角度不整合带、局部不整合带和上超带以及整合带，并与强剥蚀带，弱剥蚀带和无剥蚀带相对应。3个区带内的不整合具有不同的结构特点，角度不整合带主要以断块旋转、肩部削蚀为特征，局部不整合和上超带以珠海组上超和局部剥蚀为特征，且局部剥蚀面积与北部角度不整合带相比明显减少，整合带（南部隆起带以南）主要以整合和上超特征为主。这种展布模式说明不整合的分布样式与不同区带的构造作用和古地貌的差异有关。北部角度不整合带主要受控于断裂旋转和抬升作用，而在局部不整合和上超带内，剥蚀由底辟或局部隆起导致，整合带位于当时凹陷中心的水下环境。这样的模式反映破裂不整合面的形成与裂谷期盆地边缘的肩部隆起削蚀有关。

关键词: 破裂不整合面, 断块, 古地貌, 恩平组, 珠海组, 早渐新世末, 珠江口盆地, 中国南海

Abstract: The widespread unconformity(T₇) in the Pearl River Mouth Basin(PRMB), the origin of which is closely related to dynamic basin evolution, eustatic variation and hydrocarbon accumulation, is one of the most important unconformities of the basins located at the northern margin of South China Sea.The provenances and sedimentary environments above and below the interface show significant differences.Based on seismic and logging data, we documented the distribution and structural features of the unconformity in the PRMB during the late Early Oligocene T₇(32~30 Ma), and discussed the mechanism of the unconformity and the basinal evolution features indicated herein.Results show that the T₇ boundary is a stage boundary unconformity with most faulting terminating at T₇ or the fault displacement diminishing markedly across the unconformity, while the underlying Enping Formation formed in the shape of a wedge with its stratum thickness obviously controlled by faulting.The T₇ unconformity can be divided into three zones:the angular unconformity zone, local unconformity and onlap zone, and conformity zone in the north, corresponding to the strong erosion zone, weak erosion zone, and non-erosion zone respectively.The angular unconformity zone is characterized by truncation at the shoulder part due to fault block rotation; the local unconformity and onlap zone shows onlap features and local denudation that is significantly gentle compared with angular unconformity zone; the conformity zone is located on the south of the southern uplift in PRMB and characterized by onlapping at the depression margin and conformity contact in the depression center.The distribution pattern of the stage boundary unconformity in this study area is controlled by tectonism and palaeogeomorphology in different zones of the basin.The angular unconformity zone in the north is mainly controlled by fault rotation and uplifting, but in local unconformity and onlap zone, the erosion is mainly caused by diapir or local uplifts.The conformity zone was located under paleowater level and at the depression center.The pattern indicates that the formation mechanism of the stage boundary unconformity is related to the erosion on shoulder uplift structure at the basin margin at the rifting stage.

Key words: stage boundary unconformity, fault block, palaeogeomorphology, Enping Formation, Zhuhai Formation, late Early Oligocene, Pearl River Mouth Basin, South China Sea

中图分类号:

TE121.2

宫越,林畅松,何敏,等. 中国南海北部珠江口盆地早渐新世末破裂不整合特征及其地质意义[J]. 石油与天然气地质, 2019, 40(4): 851-863. doi: 10.11743/ogg20190414 Gong Yue,Lin Changsong,He Min,et al. Characteristics and geological significance of unconformities at the late Early Oligocene in the Pearl River Mouth Basin, northern South China Sea[J]. Oil & Gas Geology, 2019, 40(4): 851-863. doi: 10.11743/ogg20190414

参考文献

[1] Lin C,Jiang J,Shi H,et al.Sequence architecture and depositional evolution of the northern continental slope of the South China Sea:responses to tectonic processes and changes in sea level[J].Basin Research,2018,30:568-595.
[2] Morley C K.Major unconformities/termination of extension events and associated surfaces in the South China Seas:Review and implications for tectonic development[J].Journal of Asian Earth Sciences,2016,120:62-86.
[3] Franke D.Rifting,lithosphere breakup and volcanism:Comparison of magma-poor and volcanic rifted margins[J].Marine and Petroleum Geology,2013,43:63-87.
[4] Sun Z,Zhong Z,Keep M,et al.3D analogue modeling of the South China Sea:A discussion on breakup pattern[J].Journal of Asian Earth Sciences,2009,34(4):544-556.
[5] Falvey.The development of continental margins in plate tectonic theory[J].J.Aust.Pet.Explor.Assoc,1974,14,95-106
[6] Song G,Wang H,Gan H,et al.Paleogene tectonic evolution controls on sequence stratigraphic patterns in the central part of deepwater area of Qiongdongnan basin,northern South China Sea[J].Journal of Earth Science,2014,25(2):275-288.
[7] Briais A,Patriat P,Tapponnier P.Updated interpretation of magnetic anomalies and seafloor spreading stages in the south China Sea:Implications for the Tertiary tectonics of Southeast Asia[J].Journal of Geophysical Research:Solid Earth,1993,98(B4):6299-6328.
[8] Xie H,Zhou D,Pang X,et al.Cenozoic sedimentary evolution of deepwater sags in the Pearl River Mouth Basin,northern South China Sea[J].Marine Geophysical Research,2013,34(3-4):159-173.
[9] Xie H,Zhou D,Li Y,et al.Cenozoic tectonic subsidence in deepwater sags in the Pearl River Mouth Basin,northern South China Sea[J].Tectonophysics,2014,615-616:182-198.
[10] 钱坤,闫义,黄奇瑜,等.南海扩张过程及海陆变迁沉积记录[J].海洋地质前沿,2016,32(8):10-23. Qian Kun,Yan Yi,Huang Qiyu,et al.Sea floor spreading of south china sea and its depositional records of sea and land changes[J].Marine Geology Frontiers,2016,32(8):10-23.
[11] 龚再升,李思田.南海北部大陆边缘盆地油气成藏动力学研究[M].科学出版社,2004,339. Gong Zaisheng,Li Sitian.Oil & Gas Pool-Forming Dynamics in North Marginal Basins of South China Sea[M].Science Press,Beijing,2004,501.
[12] 刘志峰,王升兰,丁亮,等.珠江口盆地北部坳陷带构造特征[J].地质学刊,2017,40(1):135-141. Liu Zhifeng,Wang Shenglan,Ling Liang,et al.Main factors controlling hydrocarbon accumulation in northern subsag belt of the Zhu-1 Depression,Pearl River Mouth Basin[J].Oil and Gas Geology,2017,38(3):561-569.
[13] Barckhausen U,Engels M,Franke D,et al.Evolution of the South China Sea:Revised ages for breakup and seafloor spreading[J].Marine and Petroleum Geology,2014,58:599-611.
[14] 赵保青,于福生,朱筱敏,等.珠江口盆地古近系幕式构造活动与沉积耦合关系——以长昌-鹤山凹陷为例[J].断块油气田,2016,23(3):273-278. Zhao Baoqing,Yu Fusheng,Zhu Xiaomin,et al.Coupling of Paleogene periodic rifting activity and sedimentary characteristics in Pearl River Mouth Basin:taking Changchang-Heshan Sag as an example[J].Fault-Block Oil & Gas Field,2016,23(3):273-278.
[15] Chang J,Lee T,Hsu H,et al.Evolution of the South China Sea:Revised ages for breakup and seafloor spreading[J].Marine and Petroleum Geology,2015,59:676-678.
[16] 王思琦,张忠涛,林畅松,等.白云凹陷东南部晚渐新世陆架边缘三角洲沉积特征及沉积地貌演化[J].东北石油大学学报,2017,41(1):33-42. Wang Siqi,Zhang Zhongtao,Lin Changsong,et al.Sedimentary features and sedimentary evolution of the shelf-margin delta in late Oligocene of southeast Baiyun sag[J].Journal of Northeast Petroleum University,2017,41(1):33-42.
[17] Zhao Q.Late Cainozoicostracod faunas and paleoenvironmental changes at ODP Site 1148,South China Sea[J].Marine Micropaleontology,2005,54(1-2):27-47.
[18] Li Q,Wang P,Zhao Q,et al.A 33 Ma lithostratigraphic record of tectonic and paleoceanographic evolution of the South China Sea[J].Marine Geology,2006,230(3-4):217-235.
[19] 李思田,林畅松.南海北部大陆边缘盆地幕式裂隙的动力过程及10Ma以来的构造事件[J].科学通报,1998,43(8):797-810. Li Sitian,Lin Changsong.Episodic rifting dynamic process and tectonic events since 10Ma in the northern continental margin basin of the South China Sea[J].Science Report,1998,43(8):797-810.
[20] Zhao F,Alves T M,Wu S,et al.Prolonged post-rift magmatism on highly extended crust of divergent continental margins(Baiyun Sag,South China Sea)[J].Earth and Planetary Science Letters,2016,445:79-91.
[21] Lin A T,Watts A B,Hesselbo S P.Cenozoic stratigraphy and subside-nce history of the SouthChina Sea margin in the Taiwan region[J].Basin Research,2003,15(4):453-478.
[22] 曾清波,张功成,赵志刚,等.珠江口盆地深水区珠海组陆架边缘三角洲特征及其意义[J].沉积学报,2015,33(3):595-606. Zeng Qingbo,Zhang Gongcheng,Zhao Zhigang,et al.The shelf-margin delta feature and its significance in Zhuhai Formation of deep-water area,Pearl River Mouth Basin[J].ActaSedimentologica Sinica,2015,33(3),595-606.
[23] Lin C,Yang H,Liu J,et al.Distribution and erosion of the Paleozoic tectonic unconformities in the Tarim Basin,Northwest China:Significance for the evolution of paleo-uplifts and tectonic geography during deformation[J].Journal of Asion Earth Sciences,2012,46:0-19.
[24] Drical N W,Hogg J R,Christie-Blick.N,et al.Extensional tectonics in the Jeanne d'Arc Basin,offshore Newfoundland:implications for the timing of break-up between Grand Banks and Iberia[J].Geologi-cal Society London Special Publications,1995,90(1):1-28.
[25] Kyrkjebo R,Gabrielsen R H,Faleide J I.Unconformities related to the Jurassic-Cretaceous synrift-post-rift transition of the northern North Sea[J].Journal of the Geological Society,2004,161(1):1-17.
[26] 邵磊,李献华,汪品先,等.南海渐新世以来构造演化的沉积记录——ODP 1148站深海沉积物中的证据[J].地球科学进展,2004,19(4):539-544. Shao Lei,Li Xianhua,Wang,Pinxian,et.al.Sedimentary record of the tectonic evolution of the south china sea since the oligocene-evidence from deep sea sediments of odp site 1148[J].Advance in Earth Sciences,2004,19(4):539-544.
[27] 张功成,刘震,米立军,等.珠江口盆地-琼东南盆地深水区古近系沉积演化[J].沉积学报,2009(4):632-641. Zhang Gongcheng,Liu Zhen,MiLinjun,et al.Sedimentary evolution of paleogene series in deep water area of zhujiangkou and qiongdongnan basin[J].Sedimentologica Sinica,2009,27(4),632-641.
[28] Taylor B,Hayes D E.Origin and history of the South China Sea Basin.In:Hayes,D.E.(Ed.),The Tectonic and Geologic Evolution of Southeast Asian Seas and Islands[J].Geophysical Monograph,1983,23:89-104.
[29] Ru K,Pigott J D.Episodic rifting and subsidence in the South China Sea[J].AAPG,1986,70,1136e1155.
[30] Dong D,Wu S,Zhang G,et al.Rifting process and formation mechanisms of syn-rift stage prolongation in the deepwater basin,northern South China Sea[J].Chinese Science Bulletin,2008,53(23):3715-3725.
[31] Soares D M,Alves T M,Terrinha P.The breakup sequence and associated lithospheric breakup surface:Their significance in the context of rifted continental margins(West Iberia and Newfoundland margins,North Atlantic)[J].Earth and Planetary Science Letters,2012,355-356:311-326.
[32] Soares D M,Alves T M,Terrinha P.Contourite drifts on early passive margins as an indicator of established lithospheric breakup[J].Earth and Planetary Science Letters,2014,401:116-131.
[33] 任建业,庞雄,雷超,等.被动陆缘洋陆转换带和岩石圈伸展破裂过程分析及其对南海陆缘深水盆地研究的启示[J].地学前缘,2015(01):102-114. Ren Jianye,Pang Xiong,Lei Chao,et al.Ocean and continent transition in passive continental margins and analysis of lithospheric extension and breakup process:implication for research of the deepwater basins in the continental margins of south china sea[J].Earth Science Frontiers,2015,22(1):102-114.
[34] 黄虑生.珠江口盆地渐新统-上新统高分辨率生物地层学研究方法[J].海相油气地质,1996(4):13-20. Huang Lvsheng.High-Resolution Biostratigraphic correlation of Oligocene-Pliocene in Pearl River Mouth Basin[J]Marine Origin Petroleum Geology,1996,(4),13-20.
[35] Sutra E,Manatschal G.How does the continental crust thin in a hyperextended rifted margin? insights from the iberia margin[J].Geology,2297,40(2).
[36] 韩银学,陈莹,杨海长,等.白云凹陷恩平组"源-汇"体系及其对油气勘探的影响[J].中国石油勘探,2017(2):25-34. Han Yinxue,Chen Ying,Yang Hanichang,et al."Source to sink" of enping formation and its effects on oil and gas exploration in baiyunsag,pearl river mouth basin[J].China Petroleum Exploration,2017,22(2):25-34.
[37] Montadert L,Roberts D G,Charpal O D,Guennoc P.Rifting and Subsidence of the Northern Continental Margin of the Bay of Biscay[C]//Initial Reports of the Deep Sea Drilling Project,1979,48.
[38] 吴景富,张功成,王璞珺,等.珠江口盆地深水区23.8Ma构造事件地质响应及其形成机制[J].地球科学(中国地质大学学报),2012(4):654-666. Wu Fujing,Zhang Gongcheng,Wang Pujun,et al.Geological response and forming mechanisms of 23.8ma tectonic events in deepwater area of the pearl river mouth basin in south china sea[J].Earth Science,2012,37(4),654-666.
[39] Zhou D,Ru K,Chen H.Kinematics of Cenozoic extension on the South China Sea continental margin and its implications for the tectonic evolution of the region[J].Tectonophysics,1995,251(1):161-177.

中国南海北部珠江口盆地早渐新世末破裂不整合特征及其地质意义

Characteristics and geological significance of unconformities at the late Early Oligocene in the Pearl River Mouth Basin, northern South China Sea

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