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stratigraphic correlation of Middle TriassicSequences among Different Paleogeographic Sedimentary Facies in South China

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Journal of Earth Science 2000年第1期19卷 3-10页

作者： Tong Jinnan Xiao Shiyu Liu Zhili Faculty of Earth Sciences, China University of Geosciences, Wuhan 430074

Affected by the Indosinian movement, the sediments in the main part of South China, Yangtze platform, started to transform from marine to continental during the Middle Triassic. In the meantime, a noticeable paleogeographic and sedimentary facies differentiation occurred in the marginal regions of the platforms and produced completely different lithologic and paleontologic sequences in various paleogeographic gradients and sedimentary facies areas, which brought about the difficulties for the stratigraphic correlation based on the traditional stratigraphies. This paper proposes to use some characteristic environmental events as the markers of the stratigraphic correlation across various paleogeographic sedimentary facies, considering that some distinctive regional environmental events should have affected at the same time on the entire basin or the connected sedimentary regions and produced some closely related sedimentary records in the stratigraphic sequences though the affected intensity and recorded pattern might be different among the regions. The change of violent relative sea level (generally water depth) and the alteration of tectonic activity summarized from the dynamic mechanism of sedimentation are the best markers of environmental events for stratigraphic correlation. Based on the analysis and recognition of some significant environmental events at the typical stratigraphic sequences from various paleogeographic sedimentary facies and combined with the consideration of the variations in expressed form and strength of the events among different paleogeographic gradients and sedimentary facies, the stratigraphic sequences from different sedimentary facies can be easily correlated directly. Furthermore, the evolutionary history of the whole sedimentary basin can be clearly established.

关键词： Middle Triassic stratigraphic correlation environmental event southern Guizhou South China.

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Hierarchical delineation and multivariate statistical discrimination of chemozones of the Cauvery Basin,south India:Implications on spatio-temporal scales of stratigraphic correlation

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Petroleum Science 2010年第4期7卷 435-447页

作者： RAMKUMAR Mu. BERNER Z. STBEN D. Department of Geology Periyar University Institute of Palaeoenvironment University of Erlangen-Nuernberg Institute of Mineralogy and Geochemistry University of Karlsruhe

Success in locating oil pools in the Cauvery Basin,south India had been found to be based on the ability to delineate precisely the stratigraphic traps resulting from frequent sea level ***,recognition and delineation of them in terms of depositional units through conventional stratigraphic methods have been elusive owing to the limitations of such methods and lack of unified stratigraphic markers that could be traced at regional and basinal *** paper attempts to recognize depositional units in terms of chemozones,chronologic and lithostratigraphic units by assigning distinct geochemical *** signatures were assigned through hierarchical delineation and discriminant function *** is observed that individual depositional units could be recognized statistically with whole-rock geochemical *** strata under study show two second order chemozones comprising six major chemozones that in turn correspond to third order sea level cycles and minor chemozones at the scale of fourth order and/or further shorter sea level *** geochemical signatures showed 100% distinctness between sample populations categorized according to chronostratigraphy and *** durations of these stratigraphic units range from 18 million years to less than a million years and indicate distinct geochemical compositional change at different time *** implication and also due to the close correspondence between sea level variations reported from this basin and global sea level cycles,it is suggested that recognition and correlation of individual depositional units with distal counterparts could be made *** of these results is that stratigraphic units,at varying scales either temporally or spatially,could be assigned with unique geochemical signature,with which accurate prediction and correlation of similar units elsewhere is possible with measurable accuracy.

关键词： Chemostratigraphy statistical discrimination petroleum exploration stratigraphic correlation

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Late Carboniferous-Early Permian Volcanic Event Deposits and stratigraphic correlation in Shandong Province and Its Adjacent Regions

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Acta Geologica Sinica(English Edition) 1996年第4期70卷 380-394,453页

作者： Zhong Rong, Institute of Geomechanics, Chinese Academy of Geological Sciences, BeijingSun Shanping and Fu Zeming China University of Geosciences, Beijing Xu Niansheng, Xu Heling and Zhong Rong

Deposits of 10 volcanic events of 6 stages have been discovered by the authors after detailed field and lab studies of the Benxi and Taiyuan Formations in Shandong Province and its adjacent regions. They show certain temporal-spatial distribution characteristics. Volcanic fragments were probably derived from two different volcanic sources north and south of the North China Platform, while the magma of the two volcanic sources was probably derived from the lower crust. A new stratigraphic correlation scheme is put forward for the Benxi and Taiyuan Formations in this region on the basis of previous biostratigraphic work with the regionally widespread volcanic event layers as the marker bed for the isochronous stratigraphic correlation on a super-regional scale and in conjunction with the maximum transgressive event layers.

关键词： volcanic event deposits Late Carboniferous-Early Permian Benxi and Taiyuan Formations stratigraphic correlation volcanic source Shandong Province and its adjacent regions

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Diagenetic signatures in the deltaic and fluvial-estuarine Messinian sandstone reservoirs in the Nile Delta as a tool for high-resolution stratigraphic correlations

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International Journal of Sediment Research 2023年第5期38卷 754-768页

作者： Mahmoud Leila Andrea Moscariello Dustin Sweet Branimir ?egvi? Geology Department Faculty of Science Mansoura University Department of Earth Sciences University of Geneva Department of Geosciences Texas Tech University

The current study utilizes a range of diagenetic fingerprints to differentiate between sandstone facies deposited in the Nile Delta before and during the Messinian salinity crisis(MSC), which is normally a challenging task considering the complex bio-and lithostratigraphic subdivisions of Messinian rock units. Subaerial exposure of the pre-MSC(Qawasim deltaic sandstone), during drawdown of the Mediterranean Sea at the time of the MSC, triggered pervasive dissolution of unstable rock fragments, kaolinization of feldspar, and meteoric dolomitization of carbonate. This was followed by mesogenetic calcite cementation and kaolinite transformation into dickite in deeply buried Qawasim sandstone. Comparatively, the Abu Madi estuarine facies, deposited during transgression after drawdown related to the MSC,is characterized by eogenetic iron(Fe)-calcite, glauconite, and pyrite(averages of 14.5%, 6%, and 2%,respectively). This facies transition is marked by abundance of mature glauconite(with potassium oxide(K2O) at about 8%) whose content abates upward from the transgression surface. Moreover, the compositional variability of the Abu Madi sandstone gave rise to multiple diagenetic trajectories that resulted in chlorite formation presumably following smectite and kaolinite. Listed diagenetic variations in the studied Messinian sandstone resulted from a complex interplay between rocks’ compositional,depositional, and burial attributes, ultimately serving as a basis for high-resolution stratigraphic correlation in continental and marginal marine settings with poor biostratigraphic controls.

关键词： Messinian Nile Delta Diagenesis Deltaic sedimentation Fluvial-estuarine stratigraphic correlation

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Carbon Isotope Features of the Sugetbrak Section in the Aksu-Wushi Area, Northwest China: Implications for the Precambrian/Cambrian stratigraphic correlations

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Acta Geologica Sinica(English Edition) 2014年第5期88卷 1535-1546页

作者： YAO Chunyan DING Haifeng MA Dongsheng LI Guoxiang Nanjing Center China Geological Survey Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences State Key Laboratory for Mineral Deposits Research Nanjing University Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences

The upper Qigeblaq Formation （Fm） dolostones and the Yurtus Fm phosphatic cherts, black shales, limestones, and dolostones are widely distributed in the Precambrian/Cambrian transitional succession of the Aksu-Wushi area. Negative δ13C excursion above the Yurtus Fm/ Qigeblaq Fm boundary was determined in this study. The pronounced negative carbon isotope excursion occurs in the phosphatic chert layers at the bottom of the Cambrian Yurtus Fm, below which the first appearance of the Asteridium- Heh＇osphaeridium-Comasphaeridium （AHC） acritarch assemblage zone. The δ13C curve of the lower part of the Yurtus Fm in the Aksu-Wushi area was found to be correlated with the early Cambrian δ13C curves of the Zhujiaqing Fm （Daibu Member）, the lower part of the Yanjiahe Fm on the Yangtze Platform in China, the lower Tal Fm in India, the Sukharikha Fm in Siberia, and the upper part of the Tsagaan Oloom Fm in Mongolia through biostigraphy. The lower part of the Yurtus Fm in the Tarim Basin is at the Nemakit-Daldynian stage, and the Precambrian/Cambrian boundary of the Aksu-Wushi area may be located in the phosphatic chert unit which just below the first appearance AHC acritarch assemblage zone. The negative δ13C excursion （N1） across the Precambrian/Cambrian boundary in the studied section may have resulted from oceanic overturning and sea level rise.

关键词： Carbon isotope stratigraphic correlation Precambrian/Cambrian boundary Northwest China

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Carboniferous integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 1071-1106页

作者： Keyi HU Xiangdong WANG Wenqi WANG Yingfan SONG Xunyan YE Lu LI Yukun SHI Sunrong YANG Ying LI State Key Laboratory for Mineral Deposits Research School of Earth Sciences and Engineering and Frontiers Science Center for Critical Earth Material CyclingNanjing UniversityNanjing 210023China

During the Carboniferous Period,the Qinghai-Tibetan Plateau and its surrounding areas were located in quite different paleogeographic positions with various sedimentary and biological *** is important to systematically compile and summarize the Carboniferous strata and biotas of the Qinghai-Tibetan Plateau and its surrounding areas,to establish an integrated stratigraphic framework for correlation,and to reconstruct the paleogeography for correctly understanding the breakup of the Gondwana Continent and the evolution of the Paleo-Tethys Ocean in the Late *** Carboniferous of the Qinghai-Tibetan Plateau and its surrounding areas can be subdivided into the Gondwanan,Cimmerian,and Tethyan *** Gondwanan-type Carboniferous are distributed in the North Himalayan,Kangmar-Lhunze,and Zanda-Zumba regions of the South Tibet Subprovince and northern India-Pakistan Area,where only the Mississippian is developed and the biota is of Gondwanan *** Cimmerian-type Carboniferous,which are found in the Baoshan,Tengchong,Coqen-Xainza,LhasaZayu,Nagqu-Biru,and South Qiangtang regions,as well as Shan-Thai and South Afghanistan-Pamir areas,also represent only the Mississippian strata,but their biota is characterized by mixed characters of European,South China,Australian,and North American *** Tethyan-type Carboniferous are distributed in the Tanggula Mountains,Hoh Xil-Bayanhar,ChamdoHengduanshan,Tiekelike,West Kunlun,Karakorum,East Kunlun-Central Qinling,and Qilian regions,where the Carboniferous succession is well developed,and the biota is of warm-water Tethyan *** biostratigraphical correlation of the Gondwanan-type and Cimmerian-type Carboniferous is based mainly on conodonts and additionally on brachiopods and rugose *** Mississippian of the Tethyan-type Carboniferous is correlated mainly by using rugose corals and brachiopods,whereas in the Pennsylvanian foraminifera(fusuline)and conodonts are regarded as primary fossil groups,subord

关键词： Qinghai-Tibetan Plateau Carboniferous Lithostratigraphy Biota stratigraphic correlation

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Advances in sediment geochemistry and chemostratigraphy for reservoir characterization

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Energy Geoscience 2021年第4期2卷 308-326页

作者： Mu Ramkumar R.Nagarajan M.Santosh Department of Geology Periyar UniversitySalem636011India Department of Applied Geology Curtin UniversityMalaysia Curtin Malaysia Research Institute Curtin UniversityMalaysia School of Earth Sciences and Resources China University of Geosciences BeijingBeijingChina Department of Earth Sciences University of AdelaideAdelaideSA5005Australia

Sedimentary sequences preserve the records of changes in major controls of sedimentation namely,tectonics,climate,relative sea level and sediment production and *** potential to characterize these changes in spatial and temporal scales has led to the development of the branch of *** study of sedimentary sequences commenced from recognizing identical/contrasting geochemical features across major geochronological boundaries,and evolved into one of the essential tools in exploration,characterization,and well development *** incorporates applications on continuous,real-time geochemical mapping and direction of lateral drilling,and machine learning,among *** the sedimentary systems operate on a variety of temporal scales that range from few hours(tidal cycles)to few tens of millions of years,within which many perturbations such as catastrophic and diagenetic events take place,that lead to unique geochemical signature which can be correlated at appropriate spatial and temporal *** application of chemostratigraphic technique in hydrocarbon exploration and reservoir characterization has gained momentum in recent years,particularly with the advent of developments in analytical *** has also led to the integration of a variety of data from field sedimentary structures,mineralogy,major,trace and isotopic chemical compositions of whole rock,selected components of rocks,organic and inorganic components of oil and gas,etc.,for reservoir characterization more accurately than *** geochemical fingerprinting of oil and gas reservoir components plays a major role in the identification of source rocks,discrimination of oil families,characterization of reservoir,source,and seal segments in petroleum *** trends indicate the relevance and growing applications of machine learning techniques,artificial intelligence in real-time assessment,monitoring and planning of hydrocarbon

关键词： Biomarker Chemostratigraphy Geochemical fingerprinting Machine learning Oil family stratigraphic correlation

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Volcanic Event Layers——A Marker Bed of correlation of Coal Measures

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Acta Geologica Sinica(English Edition) 2001年第2期75卷 184-195页

作者： JIA Bingwen, ZHOU Anchao, MA Mailing and JIA Xiaoyun Department of Earth Sciences, Taiyuan University of Technology, Taiyuan 030024, Shanxi Department of Earth Sciences Taiyuan University of Technology Taiyuan 030024 Shanxi [?]2Jia Bingwen Male born in 1932 graduated from the graduate school of the former Beijing College of Geology in 1957 now professor (retired) at the Department of Earth Sciences Taiyuan University of Technology mainly engaged in the study of petrology and sedimentology.

Upper Carboniferous-Lower Permian volcanic event deposits from two cross sections in Nanpiao, Liaoning Province, and the Daqing Mountains, Inner Mongolia, were examined by systematic rock and mineral identification, differential thermal analysis, X-ray diffraction, scanning electron microscopy and trace element and rare earth element quantitative analysis. According to the results, twelve sequences of volcanic event deposits have been distinguished from bottom to top, including 34–39 volcanic event layers. As these layers each have their own distinctive petrological, mineralogical and geochemical characteristics and were derived from the same source, they provide new evidence for further ascertaining the distribution characteristics of volcanic event deposits on the northern margin of the North China plate and carrying out the stratigraphic correlation using volcanic event layers as marker beds.

关键词： Late Palaeozoic volcanic event deposits petrological mineralogical and geochemical characteristics stratigraphic correlation marker bed

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Farewell faults in complex fault blocks with multi-technological integration

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Journal of China University of Mining and Technology 2008年第2期18卷 229-231页

作者： YANG Guang-lin HU Xiao-hui YAN Jing-hua Scientific Research Institute of Exploration and Development Zhongyuan Oilfield Company Sinopec Puyang Henan 457001 China School of Energy Resources China University of Geosciences Beijing 100083 China

In the middle and second half of oilfield development,further exploration and development of petroleum reservoirs in complex fault blocks are major *** on the characteristics of fully developed farewell faults in the Wenweigu oil field and the data from 3D earthquakes,RFT,HDT and other techniques,farewell faults and their distribution were *** of the fault blocks has been provided and the precision of describing the farewell faults *** technology of farewell faults has applied these methods in this region.

关键词： farewell fault complex fault block stratigraphic correlation earthquake RFT

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Why Terrestrial Stable Carbon-isotope Stratigraphy Works: a Review

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Acta Geologica Sinica(English Edition) 2014年第5期88卷 1603-1613页

作者： FANG Linhao LU Yuanzheng DENG Shenghui State Key Laboratory of Petroleum Resources and Prospecting China University of Petroleum Department of Earth Sciences University of Oxford Research Institute of Petroleum Exploration and Development Petro China

Carbon-isotope stratigraphy launched since the early technological development of carbon- isotope measurement in 1950s, however, the emergence and advance of terrestrial carbon-isotope stratigraphy took quite a long way. At early stage the exploration of carbon-isotope stratigraphy based on the marine biological shell carbonates was verified by repeatable carbon-isotope stratigraphic data, laboratory chemical experiments and the later laboratory foraminiferal culture experiments. The breakthrough for testifying the fundamentals of terrestrial carbon-isotope stratigraphy lies on the synchronous fluctuations between the carbon-isotope stratigraphic curves derived from marine biological shell carbonates and those derived from terrestrial C3 plants. The character that carbon-isotope stratigraphic curves can be globally synchronously correlated over the marine and terrestrial/atmospheric reservoir mainly excludes the potential biasing factors, such as diagenetic bias, carbon-isotope variations in intra/inter individual plant in same species or between species, ecological changes, changes in aridity, changes in source input and representative sampling. Therefore, the fundamentals of terrestrial carbon-isotope stratigraphy based on C3 plant successfully established. The terrestrial carbon-isotope stratigraphy can be used for global stratigraphic correlation, reconstructing the evolution of atmospheric CO2 and can further verify the published global carbon-cycle models. The terrestrial carbon-isotope stratigraphy based on the compound specific biomarkers and single-grained pollen may be a promising perspective in future.

关键词： terrestrial stratigraphic correlation carbon-isotope stratigraphy diagenesis carbon cycles

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