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provenance of Central Canyon in Qiongdongnan Basin as evidenced by detrital zircon U-Pb study of Upper Miocene sandstones

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Science China Earth Sciences 2015年第8期58卷 1337-1349,1-6页

作者： CHEN Hui XIE XiNong GUO JingLiang SU Ming ZONG KeQing SHANG Fei HUANG Wei WANG Wei SHANG ZhiLei Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education Faculty of ResourcesChina University of Geosciences State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Key Laboratory of Renewable Energy and Gas Hydrate Guangzhou Institute of Energy ConversionChinese Academy of Sciences China National Offshore Oil Corporation Research Institute

Deep-water canyon systems can provide important sandstone reservoirs for deep-water oil and gas exploration in the South China Sea;however,the sedimentary provenance of the Central Canyon in the Qiongdongnan Basin remains *** this work,detrital zircon grains from three drilling sandstones in the Upper Miocene Huangliu Formation in the western part of the Central Canyon were analysed by LA-ICP-MS for U-Pb ages,in order to constrain their *** hundred and ninety-one zircon grains yield concordant U-Pb ages ranging from 28.6 to 3285 *** of them show oscillatory or linear zoning in CL-images and high Th/U ratios(>0.1),suggesting that they are magmatic *** major age clusters at about30 Ma(N=6),220–270 Ma(N=29),and 420–440 Ma(N=13),and five minor age clusters at 70–110 Ma(N=7),150–170 Ma(N=4),800–850 Ma(N=11),1800–2000 Ma(N=16),and 2400–2600 Ma(N=7),can be identified in the age spectrum,which are very similar to those of the Upper Miocene sandstones and modern river sands in the Red River area,but different from those of other nearby regions(e.g.,Hainan Island,the Pearl River area,and the Mekong River area)in Southeast *** major age peak at about 30 Ma in our samples is consistent with the timing of tectonothermal events in the Red River Fault ***,we suggest that the provenance of the western part of the Central Canyon,in the Qiongdongnan Basin,was fed dominantly by the Paleo-Red River system during the Late Miocene.

关键词： Qiongdongnan Basin Central Canyon detrital zircon U-Pb dating LA-ICP-MS sedimentary provenance

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Lower Cretaceous turbidites in the Shiquanhe–Namco Ophiolite Mélange Zone, Asa area, Tibet: Constraints on the evolution of the Meso-Tethys Ocean

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Geoscience Frontiers 2021年第4期12卷 1-20页

作者： Xiao-Wen Zeng Ming Wang Cai Li Hang Li Xian-Jin Zeng Di Shen College of Earth Sciences Jilin UniversityChangchun 130062China Key Laboratory of Mineral Resources Evaluation in Northeast Asia Ministry of Natural Resources of ChinaChangchun 130062China

Turbidites fromthe Shiquanhe–Namco OphioliteMélange Zone(SNMZ)record critical information about the tectonic affinity of the SNMZand the evolutionary history of theMeso-Tethys Ocean in *** paper reports sedimentologic,sandstone petrographic,zircon U-Pb geochronologic,and clastic rocks geochemical data of newly identified turbidites(Asa Formation)in the Asa Ophiolite Mé*** youngest ages of detrital zircon from the turbiditic sandstone samples,together with~115 Ma U-Pb concordant age from the tuff intercalation within the Asa Formation indicate an Early Cretaceous *** sandstone mineral modal composition data show that the main component is quartz grains and the minor components are sedimentary and volcanic fragments,suggesting that the turbidites were mainly derived froma recycled orogen provenancewith a minor addition of volcanic arc *** detrital U-Pb zircon ages of turbiditic sandstones yield main age populations of 170–120 Ma,300–220 Ma,600–500 Ma,1000–700 Ma,1900–1500 Ma,and~2500 Ma,similar to the ages of the Qiangtang Terrane(age peak of 600–500 Ma,1000–900 Ma,~1850 Ma and~2500 Ma)and the accretionary complex in the Bangong–Nujiang Ophiolite Zone(BNMZ)rather than the age of the Central Lhasa Terrane(age peak of~300 Ma,~550 Ma and~1150 Ma).The mineral modal compositions,detrital U-Pb zircon ages,and geochemical data of clastic rocks suggest that the Asa Formation is composed of sediments primarily recycled from the Jurassic accretionary complex within the BNMZ with the secondary addition of intermediate-felsic island arc materials from the South Qiangtang *** on our new results and previous studies,we infer that the SNMZ represents a part of the Meso-Tethys Suture Zone,rather than a southward tectonic klippe of the BNMZ or an isolated ophiolitic mélange zone within the Lhasa *** Meso-Tethys Suture Zone records the continuous evolutionary history of the northward subduction,accretion,arc-Lhasa collision,and Lhasa-Qiangta

关键词： Tibet Shiquanhe–Namco Ophiolite Mélange Zone Early Cretaceous sedimentary provenance Tectonic Affinity Meso-Tethys Ocean

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Timing of Metamorphism and provenance of the Metamorphic Basement of the Xiangshan Uranium Orefield, Jiangxi Province, China

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Acta Geologica Sinica(English Edition) 2018年第1期92卷 34-55页

作者： GUO Fusheng SHI Guo YANG Qingkun ZHANG Wanliang XIE Caifu ZHOU Wanpeng ZHANG Jiewei State Key Laboratory Breeding Base of Nuclear Resources and Environment East China University of Technology Nanchang 330013 Jiangxi China School of Earth Sciences East China University of Technology Nanchang 330013 Jiangxim China The 270 Institute of Nuclear Industry Nanchang 330200 Jiangxi China

The origin, age and evolution of the Precambrian metamorphic basement of southern China provide useful insights into early crustal development. Here, we present new laser ablation-inductively coupled plasma-mass spectrometry （LA-ICP-MS） U-Pb age data for detrital zircons from five samples of the Precambrian metamorphic basement of the Xiangshan uranium orefield. Two of these samples, from the northern Xiangshan volcanic basin, yielded a total of 140 U-Pb ages that cluster within the Neoproterozoic （773-963 Ma; 79.3% of data points）, with the rest being scattered through the Paleoproterozoic and Mesoproterozoic, along with a single Archean age. These ages indicate that this basement material is associated with the Cathaysia Block. In comparison, the 172 concordant ages from the other three samples from the southern part of the Xiangshan volcanic basin cluster within the Neoproterozoic （767-944 Ma; 59.8%） as well as the Proterozoic （37.8%） and the Archean （2502-2712 Ma; 14.5%）. These samples are also free of zircons with Grenvillian ages, indicating that these units are associated with the southeastern Yangtze Block. Combining these data with the geochemistry of these units, which suggests that the metamorphosed sedimentary rocks within the northern and southern parts of the Xiangshan basin have a common component from a magmatic island arc that formed during the early Neoproterozoic, we infer that the basin was located along the boundary between the Cathaysian and Yangtze blocks. In addition, the zircons within the samples from the southern and northern parts of the Xiangshan basin show different pre-Neoproterozoic （963 Ma） age populations but similar post- Neoproterozoic zircon populations, indicating that the amalgamation of the Cathaysian and Yangtze blocks occurred after the Neoproterozoic （960 Ma）, with magmatism peaking at 830 Ma and rifting starting at -770 Ma, leading to the subsequent deposition （from bottom to top） of the Shenshan, Kuli, and Shangshi format

关键词： basement metamorphic rock detrital zircon sedimentary provenance Precambrian,Jiangnan orogenic belt Xiangshan

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Detrital zircon constraints on late Paleozoic tectonism of the Bogda region(NW China)in the southern Central Asian Orogenic Belt

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Geoscience Frontiers 2020年第5期11卷 1533-1548页

作者： Qian Wang Guochun Zhao Yigui Han Jinlong Yao State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University229 Northern Taibai RoadXi’an 710069China Department of Earth Sciences The University of Hong KongPokfulam RoadHong KongChina

The Chinese North Tianshan(CNTS)in the southern part of the Central Asian Orogenic Belt(CAOB)has undergone multistage accretion-collision processes during Paleozoic time,which remain *** study addresses this issue by tracing the provenance of Late Paleozoic sedimentary successions from the Bogda Mountain in the eastern CNTS through U-Pb dating and Lu-Hf isotopic analyses of detrital *** detrital zircon U-Pb ages(N=519)from seven samples range from 261±4 Ma to 2827±32 *** most prominent age peak is at 313 Ma and subordinate ages vary from 441 Ma to 601 Ma,with some Precambrian detrital zircon ages(~7%)lasting from 694 Ma to 1024 *** youngest age components in each sample yielded weighted mean ages ranging from 272±9 Ma to 288±5 Ma,representing the maximum depositional *** and literature data indicate that some previously-assumed"Carboniferous"strata in the Bogda area were deposited in the Early Permian,including the Qijiaojing,Julideneng,Shaleisaierke,Yangbulake,Shamaershayi,Liushugou,Qijiagou,and Aoertu *** low maturity of the sandstones,zircon morphology and provenance analyses indicate a proximal sedimentation probably sourced from the East Junggar Arc and the Harlik-Dananhu Arc in the *** minor Precambrian detrital zircons are interpreted as recycled materials from the older strata in the Harlik-Dananhu *** EHf(t)values have increased since^408 Ma,probably reflecting a tectonic transition from regional compression to *** event might correspond to the opening of the Bogda intraarc/back arc rift basin,possibly resulting from a slab rollback during the northward subduction of the North Tianshan Ocean.A decrease of zirconεHf(t)values at^300 Ma was likely caused by the cessation of oceanic subduction and subsequent collision,which implies that the North Tianshan Ocean closed at the end of the Late Carboniferous.

关键词： North Tianshan Detrital zircon sedimentary provenance Late Paleozoic Central Asian orogenic belt

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provenance of sediments from Barra del Tordo and Tesoro beaches, Tamaulipas State, northwestern Gulf of Mexico

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Journal of Palaeogeography 2021年第3期10卷 382-398页

作者： Mayla A.Ramos-Vazquez John S.Armstrong-Altrin Posgrado en Ciencias del Mar y Limnologpa Universidad Nacional Autonoma de MexicoCiudad UniversitariaCiudad de Mexico 04510Mexico Universidad Nacional Autonoma de Mexico Instituto de Ciencias del Mar y LimnologiaUnidad de Procesos Oceanicos y CosterosCiudad UniversitariaCiudad de Mexico 04510Mexico

The mineralogy, bulk sediment geochemical composition, and U–Pb ages of detrital zircons retrieved from the Barra del Tordo(Tordo) and Tesoro beach sediments in the northwestern Gulf of Mexico were analyzed to determine their provenance. The beach sediments are mainly composed of quartz, ilmenite, magnetite, titanite,zircon, and anorthite. The weathering proxies such as the Chemical Index of Alteration(CIA), Chemical Index of Weathering(CIW), and Plagioclase Index of Alteration(PIA), reveal a moderate-to-high intensity of weathering in the source area. The chondrite-normalized rare earth element(REE) patterns are similar to felsic igneous rocks, with large negative europium anomaly(Eu/Eu^(*)= ~ 0.47–0.80 and ~ 0.57–0.67 in the Tordo and Tesoro beach sediments,respectively).Three major zircon U–Pb age groups are identified in the Tordo and Tesoro beach sediments, i.e., Proterozoic(~2039–595 Ma), Mesozoic(~ 244–70.3 Ma), and Cenozoic(~ 65.9–1.2 Ma). The differences of the zircon age spectrum between the Tordo and Tesoro beach sediments are not significant. The comparison of zircon U–Pb ages in this study with ages of potential source terranes suggests that the Mesozoic and Cenozoic zircons of the studied Tordo and Tesoro beach sediments were derived from the Eastern Alkaline Province(EAP) and Mesa Central Province(MCP). Similarly, the likely sources for the Proterozoic zircons were the Sierra Madre Oriental(SMOr) and Oaxaquia in the northwestern Gulf of Mexico. The results of this study further indicate that the sediments delivered to the beaches by rivers and redistributed by longshore currents were crucial in determining the sediment provenance.

关键词： Geochemistry sedimentary provenance Zircon U–Pb Beach sediment Rare earth elements Mexico

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provenance of the Paleoproterozoic Hutuo Group basal conglomerates and Neoarchean crustal growth in the Wutai Mountains,North China Craton:Evidence from granite and quartzite pebble zircon U-Pb ages and Hf isotopes

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Science China Earth Sciences 2012年第1期55卷 1796-1814页

作者： DU LiLin YANG ChongHui WANG Wei REN LiuDong WAN YuSheng SONG HuiXia GAO LinZhi GENG YuanSheng HOU KeJun Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China Institute of Geology and Geophysics Chinese Academy of SciencesBeijing 100029China Beijing SHRIMP Center Beijing 100037China Institute of Mineral Resources Chinese Academy of Geological SciencesBeijing 100037China

Zircon U-Pb ages(SHRIMP and LA-ICPMS) and Lu-Hf isotope data(LA-ICPMS) are presented for two granite and two quartzite pebbles from the basal conglomerates of the Sijizhuang Formation in the Hutuo Group from the Wutai Mountains area in the North China *** two granite pebbles give zircon 207 Pb/206 Pb ages of 2513±8 Ma and 2527±8 Ma respectively,which are consistent with the emplacement ages of the Wangjiahui grey granite and Guangmingsi or Shifo granite in the Wutai *** zircons from those two quartzite pebbles are mostly 2550-2490 Ma old with lesser number of 2800-2550 Ma grains,which is similar to the ages of detrital zircons from quartzites in the Gaofan Subgroup of the Neoarchean Wutai ***,the pebbles in the Hutuo Group basal conglomerates were derived locally from Wutai Mountains Neoarchean *** from the Sijizhuang Formation conglomerate granite and quartzite pebbles mostly have positive ε Hf(t) values,a minority with ε Hf(t) values like model depleted mantle(DM) of the same age,but with most showing DM model ages 200-100 *** indicates that most of the source materials were derived from the mantle within the previous 200 million years,whereas some are derived from 2550-2510 Ma juvenile crustal *** additional evidence suggests that in the North China Craton there was important initial polycyclic crustal formation and cratonization in the late Neoarchaean,prior to superimposed Palaeoproterozoic orogenic cycles.

关键词： Hutuo Group Sijizhuang Formation conglomerate zircon U-Pb age Hf isotope sedimentary provenance crustal growth

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The Early Permian active continental margin and crustal growth of the Cathaysia Block:In situ U-Pb,Lu-Hf and O isotope analyses of detrital zircons

The Early Permian active continental margin and crustal grow...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Xian-Hua Li Zheng-Xiang Li Bin He Wu-Xian Li Qiu-Li Li Yuya Gao Xuan-Ce Wang State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Isotope Geochemistry Guangzhou Institute of GeochemistryChinese Academy of Sciences The Institute for Geosciences Research(TIGeR) Department of Applied GeologyCurtin UniversityGPO Box U1987.PerthWA 6845Australia The Institute for Geosciences Research(TIGeR).Department of Applied Geology.Curtin University.GPO Box U1987.Perth.WA 6845.Australia

Late Permian to Triassic("Indosinian-aged") orogenesis and associated magmatism are widespread in southeastern China,but their causes and significance to the regional geodynamic evolution are highly *** report in this study integrated in situ U-Pb,Hf and 0 isotope analyses of detrital zircons from the Middle to Late Permian sediments in southeastern China,and use these data to decipher the sedimentary provenances, regional magmatic barcode and crustal evolution processes.A total of 409 concordant U-Pb zircon analyses on five sedimentary samples exhibits four major age peaks at ca 1870 Ma,ca 445 Ma,ca 370 Ma and ca 280 Ma, one"broad"age group of ca 1180-960 Ma,and two subordinate peaks at ca 2530 Ma and ca 800 *** the Archean-aged detrital zircons are oval in shape with clear abrasive imprints,indicating long-distance transport and/or multi-cycled sedimentary processing from unknown Archean *** contrast,detrital zircons of the remaining age groups are mostly euhedral to subhedral crystals,suggesting short-distance *** ages of ca 1870 Ma,ca 1180-960 Ma,ca 800 Ma,ca 445 Ma and ca 280 Ma are coeval with exposed magmatic rocks in the Cathaysia Block of southeastern *** ubiquitous existence of ca 280 Ma detrital zircons in the studied sediments implies a widespread occurrence of Early Permian magmatic rocks in southeastern China coastal region. In situ Hf and O isotope analyses of detrital zircons reveal periods with growth of juvenile continental crust at ca 1870 Ma,ca 1400 Ma,ca 1140-940 Ma,ca 445 Ma and c.280 Ma,alternating with reworking and recycling of continental crust at ca 1200 Ma,ca 830 Ma and ca 370 *** ca 280 Ma detrital zircons display coherent,negative correlations between eHf(T) andδO values,indicating that their igneous source rocks probably formed with reworking of ancient supracrustal materials by mantle-derived magmas in an active continental margin. This interpreted ca 280 Ma magmatic event in an active cont

关键词： Detrital zircon U-Pb age Hf and O isotopes Permian sedimentary provenance Southeastern China

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