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Planktic Foraminiferal Biostratigraphy of the Cretaceous Oceanic Red Beds in Kangmar,Southern Tibet,China

Acta Geologica Sinica(English Edition) 2011年第6期85卷 1238-1253页

作者： LI Guobiao wan xiaoqiao PAN Mao China University ofGeosciences Beijing 100871 China Peking University Beijing 100871 China

The planktic foraminifera of the Chuangde Formation （Upper Cretaceous Oceanic Red Beds, CORBs） as exposed at Tianbadong section, Kangmar, southern Tibet has been firstly studied for a detailed for a detailed biostratigraphy elaboration. A rich and well-preserved planktic foraminifera were recovered from the Chuangde Formation of the Tianbadong section and the Globotruncanita elevata, Globotruncana ventricosa, Radotruncana calcarata, Globotruncanella havanensis, Globotruncana aegyptiaca, Gansserina gansseri and Abathomphalus mayaroensis zones have been recognized. The planktic foraminiferal assemblage points to an early Campanian to Maastrichitian age for the CORBs of the eastern North Tethyan Himalayan sub-belt, which also provides a better understanding of the shifting progress of the Indian Plate to the north and the evolution of the Neotethyan ocean. The lithostratigraphy of the Chuangde Formation of the Tianbadong section comprises two lithological sequences observed in ascending succession： a lower unit （the Shale Member） mainly composed of purple （cherry-red, violet-red） shales with interbedded siltstones and siliceous rocks; and an upper unit （the Limestone Member） of variegated limestones. The strata of the Chuangde Formation in the Tianbadong section are similar to CORBs in other parts of the northern Tethyan Himalaya area of Asia （Gyangze, Sa＇gya, Sangdanlin, northern Zanskar, etc.）. The fossil contents of the Chuangde Formation in the sections （CORBs） studied provide a means of correlation with the zonation schemes for those of the northern Tethyan Himalayan sub-belt and the Upper Cretaceous of the southern Tethyan Himalayan sub-belt. Paleogeographic reconstruction for the Late Cretaceous indicates that the Upper Cretaceous Chuangde Formation （CORBs） and correlatable strata in northern Zanskar were representative of slope to basinal deposits, which were situated in the northern Tethyan Belt. Correlatable Cretaceous strata in Spiti and Gamba situated in th

关键词： Planktic Foraminifera Chuangde Formation Cretaceous Oceanic Red Beds (CORBs) Tethyan Himalaya Tianbadong southern Tibet

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Cretaceous integrative stratigraphy and timescale of China

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Science China Earth Sciences 2019年第1期62卷 256-286页

作者： Dangpeng XI xiaoqiao wan Guobiao LI Gang LI State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences

Cretaceous strata are widely distributed across China and record a variety of depositional settings. The sedimentary facies consist primarily of terrestrial, marine and interbedded marine-terrestrial deposits, of which marine and interbedded facies are relatively limited. Based a thorough review of the subdivisions and correlations of Cretaceous strata in China, we provide an up-to-date integrated chronostratigraphy and geochronologic framework of the Cretaceous system and its deposits in *** marine and interbedded marine-terrestrial sediments occur in southern Tibet, Karakorum, the western Tarim Basin,eastern Heilongjiang and Taiwan. Among these, the Himalayan area has the most complete marine deposits, the foraminiferal and ammonite biozonation of which can be correlated directly to the international standard biozones. Terrestrial deposits in central and western China consist predominantly of red, lacustrine-fluvial, clastic deposits, whereas eastern China, a volcanically active zone, contains clastic rocks in association with intermediate to acidic igneous rocks and features the most complete stratigraphic successions in northern Hebei, western Liaoning and the Songliao Basin. Here, we synthesise multiple stratigraphic concepts and charts from southern Tibet, northern Hebei to western Liaoning and the Songliao Basin to produce a comprehensive chronostratigraphic chart. Marine and terrestrial deposits are integrated, and this aids in the establishment of a comprehensive Cretaceous chronostratigraphy and temporal framework of China. Further research into the Cretaceous of China will likely focus on terrestrial deposits and mutual authentication techniques(e.g., biostratigraphy, chronostratigraphy, magnetostratigraphy and cyclostratigraphy). This study provides a more reliable temporal framework both for studying Cretaceous geological events and exploring mineral resources in China.

关键词： Cretaceous Stage/age Biostratigraphy Chronostratigraphy Magnetostratigraphy Cyclostratigraphy Stratigraphic correlation China

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The Cretaceous System in China

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Acta Geologica Sinica(English Edition) 2007年第6期81卷 957-983页

作者： wan xiaoqiao CHEN Peiji WEI Mingjian Capital Normal University 105 Xishanhuan Beilu Bering 100037 China University of Geosciences 29 Xueyuan Road Beijing 100083 Nanjing Institute of Geology and Palaeontology Chinese Aca-demy of Sciences Nanjing Jiangsu 210008

This paper provides an outline of Cretaceous stratigraphy and paleogeography in China, which is based on rich data obtained from recent researches. Cretaceous deposits are widespread in China. Most strata are of nonmarine origin and marine sediments occur only in Tibet, western Tarim Basin of Xinjiang, Taiwan and limited localities of eastern Heilongjiang. AH deposits are rich in fossils and well-constrained biostratigraphically. The stratigraphic successions of different regions are illustrated, and general stratigraphic division and correlation have been introduced. The marine deposits are described in the Tibetan Tethys, Kashi-Hotan Region of Xinjiang, eastern Heilongjiang, western Yunnan and Taiwan; the nonmarine deposits are outlined from northeast China, southeast China, southern interior China, southwest China, the Shaanxi-Gansu-Ningxia region, and northwestern China intermontane basins. The sedimentary facies and paleogeography are diversified. In Tibet the basin evolution is largely related to the subduction and collision of the Indian Plate against the Eurasian Continent, and shows a tectonic evolution in the Cretaceous. Foraminifera are a dominant biota in the Tibet Tethys. Nonmarine sediments include variegated and red beds, coal- or salt-bearing horizons, and volcanic rocks. These deposits contain diverse and abundant continental faunas and floras, as well as important coal and oil resources. The Cretaceous stratigraphy and paleogeography in China have presented a foundation for geological studies.

关键词： China Cretaceous stratigraphy paleogeography marine nonmarine

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Miocene paleoenvironmental evolution based on benthic foraminiferal assemblages in the Lufeng Sag, northern South China Sea

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Acta Oceanologica Sinica 2019年第3期38卷 124-137页

作者： Liyuan Xue Xuan Ding Renjie Pei xiaoqiao wan School of Ocean Sciences China University of Geosciences School of Earth Sciences and Resources China University of Geosciences

The Miocene epoch marks the most crucial period during the Cenozoic cooling trend, characterized by the Middle Miocene Climatic Optimum(MMCO) and a series of short–lived cooling events(Miocene isotope events).To understand the paleoenvironmental evolution along the shallow water shelf in the South China Sea during the Miocene, the benthic foraminiferal assemblage and total organic carbon content(TOC) were analyzed at Hole LF14 located in the Lufeng Sag, northern South China Sea. Three benthic foraminiferal assemblages(e.g., the Uvigerina spp. assemblage, the Cibicides spp. assemblage, and the Cibicidoides spp. assemblage), corresponding to different watermass conditions, were recognized based on Q–mode factor analysis. Early studies suggested that Hole LF14 was deposited under semienclosed bay, middle to outer shelf or even upper bathyal environment during ～18.7–4.53 Ma. The dominant Uvigerina spp. assemblage was characterized by low diversity and shallow infaunal to infaunal species, indicating a warm, low–oxygenation and eutrophic conditions since the Early Miocene to MMCO(～18.7–14.24 Ma). An abrupt sea level drop and significant faunal changes were recorded during 14.24–13.41 Ma, suggesting development of the East Antarctic Ice Sheets, which resulted in a drop of sea level and change in benthic foraminiferal assemblages along the shallow water shelf. Beyond the Uvigerina ***, the Cibicides spp. assemblage became important during the middle–late Middle Miocene(14.24–11.54 Ma). This assemblage was dominated by epifaunal species with relative high diversity, suggesting high–energy, high–oxygenation and oligotrophic conditions with episodic supply of organic food. The dominant Cibicidoides spp. assemblage with high diversity, indicates a mesotrophic conditions with relative high–oxygen content during the Late Miocene to Pliocene(11.54–4.53 Ma). The appearance and continuous occurrence of Ammonia spp. and Pseudorotalia spp. since 10.02 Ma, may reflect the i

关键词： South China Sea Lufeng Sag Miocene benthic foraminiferal assemblage total organic carbon shelf paleoenvironment

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2018 Report from the Chinese Working Group of IGCP 608

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Acta Geologica Sinica(English Edition) 2019年第S01期93卷 116-118页

作者： LI Guobiao wan xiaoqiao School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China State Key Laboratory of Environmental Geology and Biogeology China University of GeosciencesBeijing 100083China

IGCP 608"Cretaceous ecosystems and their responses to paleoenvironmental changes in South to East Asia and the Western Pacific"was issued and supported by IGCP on 11March *** this project,the spatial-temporal paleoenvironmental and paleoecosystem changes during the Cretaceous in the South to East Asia and Western Pacific region will be delineated on the basis of paleoproxy data and a diversified fossil record from wider areas and different locations.

关键词： IGCP 608 Cretaceous ecosystems paleoenvironmental changes Asia-Pacific

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New Discovery of Radiolarians in the Pomulong Mélange, Middle part of the Yarlung Zangbo Suture Zone, Tibet

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1139-1141页

作者： SUN Qian JI Zhansheng WU Guichun wan xiaoqiao School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Chinese Academy of Geological Sciences Beijing 100037China Institute of Geology CAGSBeijing 100037China

Objective The Pomulong mélange was established in the regional geological survey of Lhaze County at the scale of 1:250000 by the Geological Survey Institute of Hubei Province.

关键词： Middle Radiolarians lange

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Charophytes from the Upper Cretaceous to probably Paleocene Jiaozhou Formation in the Jiaolai Basin (Eastern China)

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Acta Geologica Sinica(English Edition) 2018年第4期92卷 1647-1648页

作者： LI Shal ZHANG Haichun wanG Qifei wan xiaoqiao Key Laboratory of Economic Stratigraphy and Palaeogeography Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and Palaeontology Chinese Academy of Sciences Nanjing 210008 China Center for Excellence in Life andPaleoenvironment Chinese Academy of Sciences Nanjing 210008 China State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Beijing 100083 China

Objective The Cretaceous-Paleogene boundary （K-Pg boundary） marks the beginning of the Cenozoic, and is one of the most important geological boundaries. Charophytes are usually very abundant in the non-marine strata near the KPg boundary, and the change in the charophyte flora can help to recognize the K-Pg boundary. The position of KPg boundary in the Jiaolai Basin, eastem Shandong Province, China is still in dispute. The LK-1 borehole project, which was carried out by the Institute of Geology, Chinese Academy of Geological Sciences, produced a high-quality core in northern Jiaozhou, Shandong. In this core, lots of charophyte gyrogonites have been found from the Jiaozhou Formation for the first time. It is significant to study these charophytes, which further helps to find the K-Pg boundary in the Jiaolai Basin.

关键词： Charophytes from the Upper Cretaceous to probably Paleocene Jiaozhou Formation in the Jiaolai Basin LK Eastern China

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Tectonics of Central Asia——A tribute to Alfred Krner and Guowei Zhang:Preface

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Geoscience Frontiers 2014年第4期5卷 439-443页

作者： M.Santosh Xuanxue Mo xiaoqiao wan School of Earth Sciences and Resources China University of Geosciences Beijing

*** to Alfred Krner and Guowei Zhang This special issue of Geoscience Frontiers（GSF）is a tribute vol-ume honoring the life and career of two world-renowned scientists,Professor Alfred Kroner and Academician Guowei... 详细信息

关键词： Zhang ner and Guowei Zhang A tribute to Alfred Kr

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Discovery of Radiolaria from the Zongzhuo Formation in Tianba,Kangmar,Tibet and its Age Implication

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Acta Geologica Sinica(English Edition) 2009年第5期83卷 853-859页

作者： LI Guobiao XIE Dan wan xiaoqiao HAN Hongdou CHEN Puli China University of Geosciences Beijing 100083 China

There is a group of variegated marine deposits, including the red beds widespread in the area of Tianba, Kangmar, southern Tibet, which previous works have contributed to Cretaceous Zongzhuo Formation by lithologic associations only, but with poor fossil evidence. Due to the absence of age dating fossils, the red bed age is obscure. Abundant Cretaceous radiolaria were discovered from the Zongzhuo Formation in the present study. In spite of the poor general preservation of some radiolarian specimens as recrystallized quartz infillings, 58 species from 46 genera of radiolaria, extracted from chert and silicous limestone of the Zongzhuo Formation in Kangmar, were identified on the basis of their shape and ornamentation. Based on the radiolaria, the age of the Zongzhuo Formation of this area has been referred to as Late Cretaceous. The new radiolarian data from the Zongzhuo Formation of Tianba area provide a local basis to correlate these deposits with other regions of the Tethyan Himalaya.

关键词： red bed radiolaria late Cretaceous Zongzhuo Formation Kangmar

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Cenomanian-Coniacian Sea-level Change and Dissolved Oxygen Fluctuations in Tethys-Himalaya: Evidences from Benthic Foraminifera of Gamba, Tibet

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Acta Geologica Sinica(English Edition) 2013年第2期87卷 501-516页

作者： JIA Jianzhong wan xiaoqiao CHEN Puli LI Guobiao JIANG Tian QU Haiying State Key Laboratory of Biogeology and Environmental Geology China University of Geosciences Petroleum Exploration and Exploitation Institute Sinopec Northwest Oil Field Company

Benthic foraminifera, preserved in the Late Cretaceous organic carbon-rich sediments of Gamba, southern Tibet, provide high-resolution proxies for sea-level changes and dissolved oxygen fluctuations of southeastern Tethys. The fossils were statistically analyzed and divided into three faunas of ＂Cenomanian fauna＂, ＂Turonian fauna＂, and ＂Coniacian fauna＂. A middle neritic-upper bathal environment （50-250m） was estimated considering the ratios of planktonic and epifaunal benthic foraminifera （P/（P＋E））, the morphological analysis according to the studies of recent foraminifera and the abundant distributions of depth-related species such as Alabamina creta, Laevidentalina sp., Praebulimina spp., Pleurostomella cf. naranjoensis, Pyrulina sp., Quinqueloculina spp., Haplophragmoides spp., etc. The result shows an almost parallel trend with the global transgressive and regressive cycles, but the former fluctuates more frequently at upper Cenomanian, which probably indicates tectonic instability of the continental margin. According to the benthic foraminiferal richness （BFN）, Shannon-Weiner diversity （H（s））, as well as benthic foraminiferal oxygen index （BFOI）, five periods of oxygen depleted conditions （dysoxic-anoxic） have been recognized. They correspond to the OAE2, the lower Turonian, the upper Turonian, the Turonian- Caniacian boundary event and the probably OAE3. In addition, the oxygen fluctuations in Gamba might be controlled directly by sea-level changes, while the paleoproductivity and oxygen conditions interacted with each other under oxygen deficiency environments.

关键词： benthic foraminifera bottom water oxygen sea-level Cretaceous Tethys-Himalaya

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