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Chinese Science Bulletin 2003年第22期48卷 2500-2506页

作者： WAN Yusheng1,2, ZHANG Qiaoda1 & SONG Tianrui1 1. Institute of Geology, Chinese Academy of Geological Sciences, beijing 100037, China 2. beijing shrimp Laboratory, beijing 100037, China Correspondence should be addressed to Wan Yusheng (e-mail: wanyusheng@***) Institute of Geology Chinese Academy of Geological Sciences Beijing China beijing shrimp Laboratory Beijing China

The Mesoproterozoic Changcheng System is widely distributed in the North China Craton. Determining its time of deposition and sources is important to understand the Precambrian crustal evolution of the North China Craton. This paper suggests age distribution patterns for detrital zircons from clastic sediments of the Changcheng System in the Ming Tombs area, beijing. Samples of feldspar-bearing sandstone (CHc-2) and pure sandstone (CHc-9) were collected from the Changzhougou Formation, which constitutes the basal part of the Changcheng System. Detrital zircons show an age range from 2.35 to 2.60 Ga. However, sample CHc-9 in the upper Changzhougou Formation also contains some zircons with ages of 1.9-1.8 Ga and 2.3-2.1 Ga. The age patterns lead to the following conclusions: (1) Most of the detrital material came from a source area composed predominantly of ~2.5 Ga continental crust of the North China Craton; (2) 1.9-1.8 Ga reflects the age record of Palaeoproterozoic continent-continent collisional event in the North China Craton; and (3) the oldest age for deposition of the Changcheng System is 1.8 Ga.

关键词：锆石原岩中国北部地区地壳演变

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Alpha-gal syndrome

Chinese Medical Journal 2024年第10期137卷 1234-1236页

作者： Mengyuan Zhan Shaohui Chen Tengda Xu Jia Yin Hao Li Zhouxian Pan Ning Cui Liping Wen Department of Allergy Peking Union Medical College HospitalPeking Union Medical CollegeChinese Academy of Medical SciencesBeijing 100730China State Key Laboratory of Complex Severe and Rare Diseases Beijing 100730China National Clinical Research Center for Dermatologic and Immunologic Diseases(NCRC-DID) Beijing 100730China Department of Health Care Peking Union Medical College HospitalChinese Academy of Medical SciencesBeijing 100730China Department of Anesthesiology Chinese Academy of Medical College and Peking Union Medical College HospitalBeijing 100730China State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing Key Laboratory of Vector Borne and Natural Focus Infectious DiseasesBeijing 100071China The No.154 Hospital XinyangHenan 464000China

To the Editor:Meat is an important source of protein and could be roughly classied into red and white *** meat,which encompasses poultry,seafood such assh and shrimp,and reptiles,etc.,is characterized by its pale color when *** meat is basically mammalian meat,including domestic animal meats,such as pork,beef,lamb,and wild animal meat in certain regions,such as kangaroos,seals,and *** mammalian meat appears red due to the presence of myoglobin in skeletal *** clinical presentations of mammalian meat allergy comprise two types of allergic reactions,immediatetype and delayed-type,although both are mediated by immunoglobulin E(IgE).The immediate-type hypersensitivity manifests as allergic symptoms occurring shortly after ingestion of red meat and is primarily triggered by serum albumin and immunoglobulin which are the major allergenic *** is the classic pattern of food *** delayed-type hypersensitivity is characterized by delayed onset of allergic symptoms 2-6 h after red meat ingestion and is mediated by oligosaccharideα-gal-specic IgE which is a recently discoveried pattern of food allergy.

关键词： allergic Alpha pattern

Early Neoarchean Magmatic and Paleoproterozoic Metamorphic Events in the Northern North China Craton:shrimp Zircon Dating and Hf Isotopes of Archean Rocks from the Miyun Area,beijing

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Acta Geologica Sinica(English Edition) 2017年第3期91卷 988-1002页

作者： SHI Yuruo ZHAO Xitao beijing shrimp Center Institute of GeologyChinese Academy of Geological Sciences Institute of Geology and Geophysics Chinese Academy of Sciences

The Miyun area of beijing is located in the northern part of the North China Craton （NCC） and includes a variety of Archean granitoids and metamorphic rocks. Magmatic domains in zircon from a tonalite reveal Early Neoarchean （2752±7 Ma） ages show a small range in εHf（t） from 3.1 to 7.4 and tDM1（Hf） from 2742 to 2823 Ma, similar to their U-Pb ages, indicating derivation from a depleted mantle source only a short time prior to crystallization. shrimp zircon ages of granite, gneiss, amphibolite and hornblendite in the Miyun area reveal restricted emplacement ages from 2594 to 2496 Ma. They also record metamorphic events at ca. 2.50 Ga, 2.44 Ga and 1.82 Ga, showing a similar evolutionary history to the widely distributed Late Neoarchean rocks in the NCC. Positive eHf（t） values of 1.5 to 5.9, with model ages younger than 3.0 Ga for magmatic zircon domains from these Late Neoarchean intrusive rocks indicate that they are predominantly derived from juvenile crustal sources and suggest that significant crustal growth occurred in the northern NCC during the Neoarchean. Late Paleoproterozoic metamorphism developed widely in the NCC, not only in the Trans-North China Orogen, but also in areas of Eastern and Western Blocks, which suggest that the late Paleoproterozoic was the assembly of different micro-continents, which resulted in the final consolidation to form the NCC, and related to the development of the Paleo-Mesoproterozoic Columbia or Nuna supercontinent.

关键词： shrimp zircon dating Neoarchean Miyun North China Craton Hf isotopes

In-Situ shrimp U-Pb Dating of Xenotime Outgrowth on Detrital Zircon Grains from the Changzhougou Formation of the Ming Tomb District, beijing

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Acta Geologica Sinica(English Edition) 2015年第1期89卷 304-305页

作者： SHI Yuruo Kennedy ALLEN Aleinikoff JOHN SONG Tianrui LI Linlin SUN Huiyi beijing shrimp Center Institute of Geology Chinese Academy of Geological Sciences Department of Applied Physics Curtin University U.S. Geological Survey

shrimp U-Pb dating of diagenetic xenotime from sedimentary rocks has provided age constraints for sedimentary diagenesis （McNaughton et al., 1999; Fletcher et al., 2000; England et al., 2001; Rasmussen et al., 2004; Vallini et al., 2007）. Xenotime （YPO4） may grow during early diagenesis, typically being present as a trace constituent in siliciclastic sedimentary rocks （Rasmussen, 2005）, in the form of syntaxial outgrowths on detrital zircon grains. Diagenetic xenotime occurs in a wide variety of rock types, including conglomerate,

关键词： shrimp Pb beijing

Constraints on sedimentary ages of the Chuanlinggou Formation in the Ming Tombs, beijing, North China Craton: LA-ICP-MS and shrimp U–Pb dating of detrital zircons

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Acta Geochimica 2018年第2期37卷 257-280页

作者： Jing Ding Yuruo Shi Alfred Kroner J. Lawford Anderson beijing shrimp Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China China University of Geosciences Beijing 100083 China Institut fur Geowissenschaften Universitat Mainz55099 Mainz Germany Department of Earth and Environment Boston University Boston MA 02215 USA

Detrital zircons in five sedimentary samples,MC1 to MC5, from the bottom of the Chuanlinggou Formation in the Ming Tombs District, beijing, were dated with the LA-ICP-MS and shrimp U–Pb methods. Age spectra of the five samples show a major peak at 2500 Ma and a secondary peak at 2000 Ma, suggesting their provenances were mainly from the crystalline basement of the North China Craton and the Trans-North China *** youngest zircon has an age of 1673 ± 44 Ma, indicating that the Chuanlinggou Formation was deposited after this age. From sample MC4 to MC5, lithology changed from a clastic rock(fine-grained sandstone) to a carbonate rock(fine-grained dolomite), suggesting that the depositional basin became progressively deeper. The age spectrum of sample MC5 shows a major peak at 2500 Ma and a secondary peak at 2000 Ma. Sample MC4, which is stratigraphically lower than sample MC5, only had one peak at 2500 Ma. We conclude that there was a transgressive event when sediments represented by MC5 was deposited, and seawater carried ca. 2000 Ma clastic materials to the basin where the Chuanlinggou Formation was deposited, leading to the addition of ca. 2000 Ma *** research indicates that the source area for the sediments became more extensive with time. We conclude thatthe Chuanlinggou Formation in the Ming Tombs District was deposited in a low-energy mud flat sedimentary environment in the inter-supra tidal zone because it is mainly composed of silty mudstone and fine-grained sandstone with relatively simple sedimentary structures.

关键词： LA-ICP-MS 沉积结构 U-Pb 年龄中国锆石岩屑北京

Late Jurassic-Early Cretaceous Plutonism in the Northern Part of the Precambrian North China Craton:shrimp Zircon U-Pb Dating of Diorites and Granites from the Yunmengshan Geopark,beijing

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Acta Geologica Sinica(English Edition) 2009年第2期83卷 310-320页

作者： SHI Yuruo ZHAO Xitao MA Yinsheng HU Daogong LIU Qisheng WU Zhenhan ZHAO Yuanyi LIU Dunyi beijing shrimp Center Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

The Yunmengshan Geopark in northern beijing is located within the Yanshan range. It contains the Yunmengshan batholith, which is dominated by two plutons： the Yunmengshan gneissic granite and the Shicheng gneissic diorite. Four samples of the Yunmengshan gneissic granite give shrimp zircon U-Pb ages from 145 to 141 Ma, whereas four samples of the Shicheng gneissic diorite have ages from 159 Ma to 151 Ma. Dikes that cut the Yunmengshan diorite record shrimp zircon U-Pb age of 162±2 and 156±4 Ma. The cumulative plots of zircons from the diorites show a peak age of 155 Ma, without inherited zircon cores, and the peak age of 142 Ma for granite is interpreted as the emplacement age of the Yunmengshan granitic pluton, whose igneous zircons contain inherited zircon cores. The data presented here show that there were two pulses of magmatism： early diorites, followed c13 Ma later by true granites, which incorporated material from an older continental crust.

关键词： shrimp zircon U-Pb age Yunmengshan Geopark North China Craton

The Toxic Effects of Strong Chlorin Disinfectant on Mangroves and Emission Thresholds

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Open Journal of Ecology 2024年第2期14卷 114-124页

作者： Yunan Yang Nan Zhou Xinyu Liu School of Space and Environment Beihang University Beijing China

In this study, based on the simulated discharge results of chemical disinfectants, hypocotyl germination concentration gradient pre-test and concentration gradient determination experiment were set up respectively. Laboratory cultivation was conducted to compare and analyze the root germination and germination indexes, three mangrove hypocotyls of Kandelia candel (Linn.) Druce, Ceriopstagal C.B. Rob. and Bruguiera sexangula var. Rhynchopetalas’ efficiency of cumulative root germination, cumulative germination and the cumulative expansion of the second pair of leaves, one-way analysis of variance was used to obtain the tolerance threshold of three mangrove hypocotyls to strong chlorin disinfectant. The study determined that the by-products of strong chlorin disinfectant, the toxic threshold concentrations of Kandelia candel (Linn.) Druce, Ceriopstagal C.B. Rob. and Bruguiera sexangula var. rhynchopetala are close to 0.55 mg/L, 0.55 mg/L and 0.25 mg/L, respectively. This concentration range is lower than the average concentration of 1.183 mg/L of active chlorine emitted from strong chlorine concentrate during pond clearing in high-level shrimp ponds, indicating that transient emissions of strong chlorine concentrate during pond clearing can have a toxic effect on mangrove plants. The strength of tolerance of the embryonic axes of the three mangrove species to effective chlorine contamination was, Ceriopstagal C.B. Rob. stronger than Bruguiera sexangula var. rhynchopetala, and Kandelia candel (Linn.) Druce is the weakest.

关键词： Strong Chlorin Toxicity Threshold Germination of Mangrove Hypocotyls One-Way Analysis of Variance

shrimp zircon U-Pb age and Nd isotopic study on the Nyainqêntanglha Group in Tibet

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Science China Earth Sciences 2005年第9期48卷 1377-1386页

作者： HU Daogong1, WU Zhenhan1, JIANG Wan1, SHI Yuruo2, YE Peisheng1 & LIU Qisheng1 1. Institute of Geomechanics, Chinese Academy of Geological Sciences, beijing 100081, China 2. Institute of Geology, Chinese Academy of Geological Sciences, beijing shrimp centre, beijing 100037, China Institute of Geomechanics Chinese Academy of Geological Sciences Beijing China Institute of Geology Chinese Academy of Geological Sciences Beijing SHRIMP Centre Beijing China

The Nyainqêntanglha Group is traditionally viewed as the oldest metamorphic basement in the Lhasa block, but its formation age and tectonic setting remain debate. Zircons extracted from the metamorphic sequence of volcanics and intrusions of the Nyainqêntanglha Group, 10 km west of Nam Co in northern Lhasa block, have been investigated by cathodolu- minescence (CL), backscattered (BSE) and dated by ion microprobe (shrimp). We conclude that the U-Pb age of 787±9 Ma of zircons from the trondhjemite imposes a constraint on maxi- mum protolith age, and minimum formation age of the Nyainqêntanglha Group is constrained by U-Pb age of 748±8 Ma of zircons from the granite. The formation age of the Nyainqêntanglha Group is consistent with sedimentary age of Greater Himalayan rocks, showing that they devel- oped coevally in an arc-basin tectonic setting of Neoproterozoic active continental margin along the northern margin of the India shield. The inherited zircons from the tholetiite and granite give older 207Pb/206Pb ages from 947 to 1766 Ma. The positive εNd( t ) value indicates that the mafic rocks were derived from the depleted mantle, but contaminated by the older continental crustal material. Integrated Nd model age and U-Pb age data provide excellent evidence for the exis- tence of Mesoproterozoic basement in the Lhasa block during Neoproterozoic time.

关键词： Nyainqêntanglha Group, shrimp dating, Nd isotope, Neoproterozoic, Tibet.

Multistage Formation of Neoarchean Potassic Meta-Granites and Evidence for Crustal Growth on the North Margin of the North China Craton

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Journal of Earth Science 2023年第3期34卷 658-673页

作者： Xiaowei Zhang Huafeng Zhang Ying Tong Laboratory of National Land Space Planning and Disaster Emergency Management of Inner Mongolia Chifeng UniversityChifeng 024000China beijing shrimp Center Institute of GeologyChinese Academy of Geological SciencesBeijing 100037China School of Earth Sciences and Resources China University of GeosciencesBeijing 100083China Key Laboratory of Earthprobe and Geodynamics Chinese Academy of Geological SciencesBeijing 100037China

The North China Craton(NCC)is one of the most complex cratons in the *** underwent a series of tectonothermal events during the *** petrogenesis of potassic granitoids,the timing,and the style of Archean crustal growth are still *** field and petrological stdudies on the potassic meta-granites from the Guyang-Chayouzhongqi region were carried *** U-Pb ages,zircon Lu-Hf isotopic analyses,and whole-rock geochemical data were *** groups(~2.7 Ga and~2.5 Ga)of potassic meta-granites were ***~2.7 Ga meta-granites are mainly A2-type,with variableεHf(t)values(-8.4 to+3.3)and Archean one stage model ages(T_(DM)=~3.0 Ga),indicating that their source was derived from ancient anatectic TTG-like granite and depleted mantle,which suggests that thin crust had formed in the Guyang-Chayouzhongqi region by~3.0 *** to the K-rich granites in the NCC,most of the~2.5 Ga potassic meta-granites are typical of A1-type granite,and are enriched in Sm and Gd and depleted in Nb,Ta,P,and *** ages and isotopic data indicate that the~2.5 Ga meta-granites were generated from juvenile crustal sources with Neoarchean *** overall zircon U-Pb and Hf isotopic data furthermore suggested that the~2.7 Ga event is the most important stage of magmatic accretion in the NCC,similar to other *** contrast,reworking or metamorphic alteration was the main crustal process in the NCC at~2.5 Ga.

关键词： zircon U-Pb age Lu-Hf isotope geochemistry potassic meta-granite crustal growth North China Craton

Dating of zircon from high-grade rocks:Which is the most reliable method?

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Geoscience Frontiers 2014年第4期5卷 515-523页

作者： Alfred Krner Yusheng Wan Xiaoming Liu Dunyi Liu beijing shrimp centre Institute of GeologyChinese Academy of Geological Sciences State Key Laboratory of Continental Dynamics Department of GeologyNorthwest University

Magmatic zircon in high-grade metamorphic rocks is often characterized by complex textures as revealed by cathodoluminenscence （CL） that result from multiple episodes of recrystallization, over- growth, Pb-loss and modifications through fluid-induced disturbances of the crystal structure and the original U-Th-Pb isotopic systematics. Many of these features can be recognized in 2-dimensional CL images, and isotopic analysis of such domains using a high resolution ion-microprobe with only shallow penetration of the zircon surface may be able to reconstruct much of the magmatic and complex post- magmatic history of such grains. In particular it is generally possible to find original magmatic domains yielding concordant ages. In contrast, destructive techniques such as LA-ICP-MS consume a large volume, leave a deep crater in the target grain, and often sample heterogeneous domains that are not visible and thus often yield discordant results which are difficult to interpret. We provide examples of complex magmatic zircon from a southern Indian granulite terrane where shrimp lI and LA-ICP-MS analyses are compared. The shrimp data are shown to be more precise and reliable, and we caution against the use of LA-ICP-MS in deciphering the chronology of complex zircons from high-grade terranes.

关键词： Zircon datingHigh-grade rockshrimpLA-ICP-MS