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sedimentary evolution and control factors of the Rizhao Canyons in the Zhongjiannan Basin, western South China Sea

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Acta Oceanologica Sinica 2023年第9期42卷 16-26页

作者： Meijing Sun Yongjian Yao Weidong Luo Jie Liu Xiaosan Hu Jiao Zhou Dong Ju Ziying Xu Guangzhou Marine Geological Survey Guangzhou 511458China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China Key Laboratory of Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of SciencesGuangzhou 510640China

Submarine canyon is an important channel for long-distance sediment transport, and an important part of deepwater sedimentary system. The large-scale Rizhao Canyons have been discovered for the first time in 2015 in the continental slope area of the western South China Sea. Based on the interpretation and analysis of multi-beam bathymetry and two-dimensional multi-channel seismic data, the geology of the canyons has however not been studied yet. In this paper, the morphology and distribution characteristics of the canyon are carefully described,the sedimentary filling structure and its evolution process of the canyon are analyzed, and then its controlling factors are discussed. The results show that Rizhao Canyons group is a large slope restricted canyon group composed of one east-west west main and nine branch canyons extending to the south. The canyon was formed from the late Miocene to the Quaternary. The east-west main canyon is located in the transition zone between the northern terrace and the southern Zhongjiannan Slope, and it is mainly formed by the scouring and erosion of the material source from the west, approximately along the slope direction. Its development and evolution is mainly controlled by sediment supply and topographic conditions, the development of 9 branch canyons is mainly controlled by gravity flow and collapse from the east-west main canyon. This understanding result is a supplement to the study of “source-channel–sink” sedimentary system in the west of the South China Sea, and has important guiding significance for the study of marine geological hazards.

关键词： canyon geomorphology sedimentary evolution control factors Zhongjiannan Basin western South China Sea

sedimentary evolution of the Central Canyon System in the Qiongdongnan Basin, northern South China Sea

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Petroleum Research 2016年第1期1卷 81-92页

作者： Ming Su Xinong Xie Zhenfen Wang Tao Jiang Cheng Zhang Yunlong He School of Marine Sciences Sun Yat-sen UniversityGuangzhou 510275China Key Laboratory of Offshore Oil Exploration and Development of Guangdong Higher Education Institutes Guangzhou 510006China Key Laboratory of Gas Hydrate Chinese Academy of SciencesGuangzhou 510640China Key Laboratory of Tectonics&Petroleum Resources of Chinese Ministry of EducationChina University of GeosciencesWuhan 430074China Department of Technology of Zhanjiang BranchChina National Offshore Oil Co.LtdZhanjiang 524057China

This study elucidates sedimentary evolution history of the Central Canyon System(CCS),a large axial submarine canyon in the Qiongdongnan Basin(QDNB),northern South China *** characteristics and infill architectures of the CCS are summarized based on theanalysis of two-and three-dimensional seismic *** on a comparative analysis of the CCS indifferent segments and evolutionary stages and in consideration of the tectono-sedimentary conditionsof the QDNB four stages of the sedimentary evolution of the CCS can be divided,*** stage in the Late Miocene(11.6-5.7Ma),erosion-infilling stage in the Early Pliocene(5.7-3.7 Ma),tranquil infilling stage in the Late Pliocene(3.7-1.81 Ma),and rejuvenation stage sincethe Pleistocene(1.81 Ma to present).In the 1ate Middle Miocene(~11.6 Ma),the rudiment of CCswas developed by a regional tectonic transformation in the eastern part of the *** the EarlyPliocene,the CCS was further developed from west to east and restrained in the central depressionbelt of the basin due to abundant sediment supplies from the northwestern and northem provenances,the blocking effect of the southern uplift belt,and the restrictive geomorphological features of theeastern part of the *** the Late Pliocene,changes in the sedimentary environment resulted in thedevelopment of the CCS in the eastern part of the basin *** the Pleistocene,the joint action ofclimatic factors and geomorphological features of the eastern part of the basin led to the rejuvenationof the CCS.

关键词： Central Canyon System sedimentary evolution Late Miocene Qiongdongnan Basin northern South China Sea

Deep-water depositional architecture and sedimentary evolution in the Rakhine Basin,northeast Bay of Bengal

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Petroleum Science 2020年第3期17卷 598-614页

作者： Hong-Xia Ma Guo-Zhang Fan Da-Li Shao Liang-Bo Ding Hui Sun Ying Zhang Yong-Gang Zhang Bryan T.Cronin PetroChina Hangzhou Research Institute of Geology Hangzhou 310023ZhejiangChina Deep Marine Ltd.9 North Square FootdeeAberdeen AB 115DX.Scotland.UK

Since the consecutive discovery of several gas fields from 2004 to present,the Rakhine Basin has been an active area for petroleum exploration in the Bay of ***-resolution 3D seismic data and well data from blocks AD1,AD6 and AD8 offshore northwest Myanmar are used to study the Miocene–Pleistocene depositional architecture and sedimentary evolution in the Rakhine *** of seismic facies and seismic attributes indicates that deep-water architectural elements include submarine canyons,confined slope channel complex systems,aggradational channel–levee complexes,isolated channels,frontal splays and mass-transport complexes,which have variable characters(shape,dimension,sedimentary architecture)within predominantly background deep-water slope-basin floor *** of the sediments are interpreted to be sourced from the Ganges–Brahmaputra fluvio-deltaic system to the north with only minor lateral input from the IndoMyanmar Ranges to the *** of the depositional evolution and architectural elements transformation during the filling history of the Rakhine Basin suggests the Rakhine Basin experienced rapid progradation during the Oligocene–Middle/Upper Miocene,gradual retrogradation during the Middle/Upper Miocene–Early Pliocene and gradual progradation during the Early Pliocene–*** exploration results indicate that the main reservoirs of the discoveries in blocks A1 and A3 are Pliocene frontal splays and channel–levee fills,dominated by fine and very fine-grained sandstones,in structural and structural–stratigraphic *** results from seismic characters and several exploration wells indicate that channel complexes and associated overbanks and frontal splays with fine-grained sandstones and siltstones trapped by the four-way closures are primary reservoir targets.

关键词： Bengal fan Rakhine basin Architectural element sedimentary evolution

Sequence sedimentary evolution and reservoir distribution in the third and fourth members of Sinian Dengying Formation,Gaomo area,Sichuan Basin,SW China

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Petroleum Exploration and Development 2022年第5期49卷 1004-1018页

作者： TAN Lei LIU Hong CHEN Kang NI Hualing ZHOU Gang ZHANG Xuan YAN Wei ZHONG Yuan LYU Wenzheng TAN Xiucheng ZHANG Kun State Key Laboratory of Oil and Gas Reservoir Geology and Exploration Southwest Petroleum UniversityChengdu 610500China Sichuan Natural Gas Geology Key Laboratory Southwest Petroleum UniversityChengdu 610500China CNPC Key Laboratory of Carbonate Reservoirs Southwest Petroleum University Division Chengdu 610500China Research Institute of Petroleum Exploration and Development PetroChina Southwest Oilfield CompanyChengdu 610041China Southwest Geophysical Research Institute BGPCNPCChengdu 610213China

Based on comprehensive analysis of cores,thin sections,logging and seismic data,the sequence stratigraphy and sedimentary evolution of the third and fourth members of Sinian Dengying Formation(Deng 3 and Deng 4 members for short)in the Gaomo area of Sichuan Basin were investigated,and the favorable zones for reservoir development in the Deng 3 Member and Deng 4 Member were predicted.(1)Two Type I and one Type II sequence boundaries are identified in the Deng 3 and Deng 4 *** on the identified sequence boundaries,the Deng 3 and Deng 4 members can be divided into two third order sequences SQ3 and SQ4,which are well-developed,isochronal and traceable in this area;the SQ3 thins from west to the east,and the SQ4 thins from northwest to southeast.(2)The sedimentary environment from the depositional period of SQ3 to SQ4 has experienced the evolution from mixed platform to rimmed platform,and the platform rimmed system on the west side is characterized by the development of platform margin microbial mound and grain shoal *** intraplatform area is a restricted platform facies composed of a variety of dolomites,and there are local micro-geomorphic highlands of different scales and scattered intraplatform mounds and shoals.(3)The Deng 4 Member reservoirs,with obvious facies-controlled characteristic,are mainly distributed in the upper part of high-frequency upward shallow cycle and the high-stand systems tract of the third-order sequence vertically,and are more developed in the platform margin belt than in the intraplatform belt,and more developed in the Gaoshiti platform margin belt than in the west Suining platform margin belt on the plane.(4)Three types of favorable reservoir zones of Deng 4 Member have been finely delineated with 3D seismic data;among them,the mound and shoal facies zones developed in the ancient highlands of the intraplatform are the first choice for the next exploration and development of the Deng 4 Member.

关键词： Sinian Dengying Formation rimmed platform sequence stratigraphy sedimentary evolution reservoir favorable exploration zone Gaomo area Sichuan Basin

Late Cenozoic sedimentary evolution of Pagri-Duoqing Co graben, Southern End of Yadong-Gulu Rift, Southern Tibet

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Acta Geologica Sinica(English Edition) 2018年第3期92卷 972-987页

作者： HA Guanghao WU Zhonghai HE Lin WANG Shubing Key Laboratory of Neotectonic Movement & Geohazards Ministry of Natural Resources Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Chinese Academy of Geological Sciences Beijing 10003 7 China College of Earth Science and Resources China University of Geosciences Beijing 100083 China

The north trending rifts in southern Tibet represent the E-W extension of the plateau and confirming the initial rifting age is key to the study of mechanics of these rifts. Pagri-Duoqing Co graben is located at southern end of Yadong-Gulu rift, where the late Cenozoic sediments is predominately composed of fluvio-lacustrine and moraine. Based on the sedimentary composition and structures, the fluviolacustrine could be divided into three facies, namely, lacustrine, lacustrine fan delta and alluvial fan. The presence of paleo-currents and conglomerate components and the provenance of the strata around the graben indicate that it was Tethys Himalaya and High Himalaya. Electron spin resonance(ESR) dating and paleo-magnetic dating suggest that the age of the strata ranges from ca. 1.2 Ma to ca. 8 Ma. Optically stimulated luminescence(OSL) dating showed that moraine in the graben mainly developed from around181-109 ka(late Middle Pleistocene). Combining previous data about the Late Cenozoic strata in other basins, it is suggested that 8-15 Ma may be the initial rifting time. Together with sediment distribution and drainage system, the sedimentary evolution of Pagri could be divided into four stages. The graben rifted at around 15-8 Ma due to the eastern graben-boundary fault resulting in the appearance of a *** by a geologically quiet period about 8-2.5 Ma, the paleolake expanded from east to west at around 8-6 Ma reaching its maximum at ca. 6 Ma. Then, the graben was broken at about 2.5 Ma. At last,the development of the glacier separated the graben into two parts that were Pagri and Duoqing Co since the later stages of the Middle Pleistocene. The evolution process suggested that the former three stages were related to the tectonic movement, which determined the basement of the graben, while the last stage may have been influenced by glacial activity caused by climate change.

关键词： north trending rifts initial rifting age Late Cenozoic strata sedimentary evolution OSL ESR and paleomagnetic dating Tibet China

Jurassic sedimentary evolution of southern Junggar Basin:Implication for palaeoclimate changes in northern Xinjiang Uygur Autonomous Region,China

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Journal of Palaeogeography 2014年第2期3卷 145-161页

作者： Shun-Li Li Xing-He Yu Cheng-Peng Tan Ronald Steel School of Energy China University of Geosciences (Beijing) Jackson School of Geosciences University of Texas at Austin

Junggar Basin,located in northern Xinjiang,presents continuous and multikilometer-thick strata of the Jurassic *** Jurassic was entirely terrestrial fluvial and lacustrine deltaic *** outcrop sections across the Jurassic strata were measured at a resolution of meters in southern Junggar *** factors of sedimentary evolution and palaeoclimate changes in Junggar Basin during the Jurassic were discussed based on lithology,fossils and tectonic *** the Early to Middle Jurassic,the warm and wide Tethys Sea generated a strong monsoonal circulation over the central Asian continent,and provided adequate moisture for Junggar ***-bearing strata of the Badaowan,Sangonghe,and Xishanyao Formations were developed under warm and humid palaeoclimate in Junggar *** the late Middle Jurassic,Junggar Basin was in a semi-humid and semi-arid environment due to global warming *** in the upper part of the Middle Jurassic with less plant fossils became multicolor or reddish from dark color *** the Late Jurassic,collision of Lhasa and Qiangtang Block obstructed monsoon from the Tethys Sea.A major change in climate from semi-humid and semi-arid to arid conditions took place,and reddish strata of the Upper Jurassic were developed across Junggar Basin.

关键词： sedimentary evolution palaeoclimate change Jurassic Junggar Basin China

Enlightenment of the Mariana Fore-arc sedimentary Basin evolution to the Subduction Process

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Acta Geologica Sinica(English Edition) 2022年第1期96卷 71-80页

作者： XING Lei LI Qianqian MENG Qingwei LIU Huaishan WEI Jia LU Boran ZHOU Heng Key Lab of Submarine Geosciences and Prospecting Techniques Ministry of EducationOcean University of ChinaQingdaoShandong 266100China Evaluation and Detection Technology Laboratory of Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdaoShandong 266237China Chinese Academy of Geological Sciences Beijing 100037China Qingdao Institute of Marine Geology China Geological SurveyMinistry of Natural ResourcesQingdaoShandong 266071China BGP International CNPCZhuozhouHebei 072750China

The Mariana subduction structure is a hot topic in ocean-ocean subduction zone research,and its subduction mechanism has attracted wide attention from experts and scholars in China and *** on the multi-channel seismic data of survey line MGL1204 in the Mariana fore-arc and DSDP ocean drilling data,this paper studies the development and evolution characteristics of the structure and strata in the Cenozoic Mariana fore-arc sedimentary *** Cenozoic strata are divided into six seismic sequences,with the possible era of each seismic sequence discerned,and the relationship between fault development and earthquakes *** episodic activity of the volcanic chain of the Mariana island arc is thought to control the tectonic and stratigraphic development pattern of the Cenozoic sedimentary basin in the *** 16°N-19°N and 146°E-151°E,the maximum thickness of the sedimentary center of the Cenozoic fore-arc sedimentary basin in Mariana is about 2360 *** faults are developed in the area and some broke to the seabed,indicating that the Mariana island arc is still in the post-arc expansion *** application of multi-channel seismic sections in structural and stratigraphic evolution study is an important means to elucidating the Mariana subduction mechanism.

关键词： subduction system fore-arc basin sedimentary evolution subduction mechanism Mariana

The sedimentary evolution During Late Triassic-Jurassic Period and the Hydrocarbon Exploration Direction in the Eastern Part of the Qiangtang Basin, Tibet

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Acta Geologica Sinica(English Edition) 2020年第S1期94卷 35-35页

作者： LIU Ruohan HE Bizhu ZHENG Menglin LUO Xiaoping PENG Yang YUN Xiaorui CHEN Weiwei YU Zhuoying MNR Key Laboratory of Deep-Earth Dynamics Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China Petroleum Exploration and Development Institute Xinjiang Oilfield CompanyKaramay 834000China State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China

Based on the field outcrops surveyed,combined with recent published the regional tectonic evolution and geochronology data,we analyzed the lithologies and rock associations of strata,identified the sedimentary facies types,and discussed the distribution sedimentary facies and the hydrocarbon accumulation in the eastern Qiangtang basin during the Late Triassic–*** by regional unconformities,there are two tectono-stratigraphic units(from the Carnian to the Norian and from the Rhaetian to the Kimmeridgian,respectively)in the eastern part of Qiangtang *** systematically described the distribution range,thickness variation and lithological characteristics of different formations in the tectonostratigraphic *** Late Triassic-Jurassic is dominated by marine facies and marine-continental transitional *** marine-continental transitional facies include deltaic and tidallagoon *** facies including gentle carbonate slope,evaporative platform,restricted platform,littoral,neritic,bathyal and abysmal *** Carnian stage is dominated by littoral–neritic–bathyal–abysmal facies in the north Qiangtang depression otherwise the littoral–neritic facies in the south Qiangtang *** early Norian stage is dominated by carbonate gentle slope-mixed continental shelf *** late Norian,Bajocian,Callovian and Kimmeridgian stage are dominated by tidal flat-delta facies in the north Qiangtang depression and littoral-neritic facies in the south Qiangtang *** Bathonian and Oxfordian stage are dominated by evaporative platform-restricted platform-mixed continental shelf *** sedimentary facies formed zones from north to south and extended in an E–W *** Eastern Lower Uplift(ELU)played an important role in the division zones of sedimentary facies from north to *** the Bathonian and Oxfordian,the ELU developed below the sea level and controlled the distribution of restricted platform,evaporative platform and p

关键词： late Triassic-Jurassic sedimentary facies sedimentary evolution hydrocarbon prospect eastern Lower Uplift region eastern part of the Qiangtang basin

Estimating stratal completeness of carbonate deposition via process-based stratigraphic forward modeling

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Science China Earth Sciences 2021年第2期64卷 253-259页

作者： Jianliang LIU Keyu LIU School of Geosciences China University of Petroleum(East China)Qingdao 266580China Key Laboratory of Deep Oil and Gas China University of Petroleum(East China)Qingdao 266580China Laboratory for Marine Mineral Resources Qingdao National Laboratory for Marine Science and TechnologyQingdao 266071China

Hiatuses are ubiquitous in stratigraphic records at various temporal scales,but they cannot be easily identified and quantified owing to the lack of adequate methods in determining the duration of hiatuses or stratal *** a processbased stratigraphic forward modeling(SFM)approach was used to effectively estimate the completeness of carbonate strata in three dimensions and at *** using information derived from both spatial and temporal domains in the SFM outputs for five grid locations(pseudo wells)under different depositional settings,we were able to delineate basin-wide hiatuses of various temporal scales and determine their durations and stratal completeness *** stratal completeness appears to be controlled by sea level changes,depositional environments,carbonate growth rates and tectonic subsidence patterns in various ways.

关键词： Stratal completeness Time domain sedimentary evolution Controlling factors Carbonate deposition Stratigraphic forward modeling