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中国科学院地质与地球物理研究所2003学术年会

作者： Paul Kapp Craig E.Manning T.mark Harrison Michael H.Taylor Department of Geosciences University of ArizonaTucsonArizonaUSA Department of Earth and Space Sciences and Institute of Geophysics and Planetary Physics University of CaliforniaLos AngelesCahforniaUSA Institute of Advanced Studies Australian National UniversityCanberraACTAustralia Department of Earth and Space Sciences and Institute of Geophysics and Planetary Physics University of CaliforniaLos AngelesCaliforniaUSA.

A>500-km-long east-west trending metamorphic belt in the Qiangtang terrane of central Tibet consists of tectonic melange that occurs in the footwalls of Late Triassic-Early Jurassic domal low-angle normal *** melange is comprised of a strongly deformed matrix of metasedimentary and mafic schists that encloses lesser-deformed blocks of metabasites,Carboniferous-Triassic metasedimentary rocks,and early Paleozoic *** the blocks and melange matrix exhibit greenschist,epidote-blueschist, and locally,epidote-amphibolite facies mineral *** reveals that the metamorphic belt experienced pressures of>10 *** equilibration temperatures for mafic schists in the melange matrix decrease from east to west,from～660℃near Shuang Hu(33°N,89°E),～500℃near Rongma(33°N,87°E),to～425℃near Gangma Co(34°N,84°E).Equilibration at consistently high pressures over a large range of temperatures is compatible with metamorphism of Qiangtang melange within a low-angle subduction zone beneath a continental *** structural, thermobarometric,and Ar/39)Ar studies suggest that Qiangtang melange was exhumed in an intracontinental setting from depths of>35 km to upper crustal levels inpb ion-microprobe ages that range from early Paleozoic to Early Archean,and could have been sourced from terranes to the north of the Jinsha *** results support a model in which Qiangtang melange was underthrust～200 km beneath the Qiangtang terrane during early Mesozoic flat-slab southward subduction of Paleo-Tethyan oceanic lithosphere along the Jinsha *** model predicts that significant portions of the central Tibetan continental mantle lithosphere were removed during early Mesozoic low-angle oceanic subduction and that the present-day central Tibetan deeper crust includes large volumes of underthrust early Mesozoic

关键词： Tibet blueschist melange exhumation subduction metamorphic core complex

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Identifying Pathfinder Elements for Gold in Multi-Element Soil Geochemical Data from the Wa-Lawra Belt, Northwest Ghana: A Multivariate Statistical Approach

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International Journal of Geosciences 2012年第1期3卷 62-70页

作者： Prosper Mackenzie Nude John Mahfouz Asigri Sandow mark Yidana Emmanuel Arhin Gordon Foli Jacob Mawuko Kutu Department of Earth Science University of Ghana Legon Ghana

A multivariate statistical analysis was performed on multi-element soil geochemical data from the Koda Hill-Bulenga gold prospects in the Wa-Lawra gold belt, northwest Ghana. The objectives of the study were to define gold relationships with other trace elements to determine possible pathfinder elements for gold from the soil geochemical data. The study focused on seven elements, namely, Au, Fe, pb, Mn, Ag, As and Cu. Factor analysis and hierarchical cluster analysis were performed on the analyzed samples. Factor analysis explained 79.093% of the total variance of the data through three factors. This had the gold factor being factor 3, having associations of copper, iron, lead and manganese and accounting for 20.903% of the total variance. From hierarchical clustering, gold was also observed to be clustering with lead, copper, arsenic and silver. There was further indication that, gold concentrations were lower than that of its associations. It can be inferred from the results that, the occurrence of gold and its associated elements can be linked to both primary dispersion from underlying rocks and secondary processes such as lateritization. This data shows that Fe and Mn strongly associated with gold, and alongside pb, Ag, As and Cu, these elements can be used as pathfinders for gold in the area, with ferruginous zones as targets.

关键词： Multivariate Analyses Multi-Elements Soil Geochemical Data Pathfinder Elements Gold Northwest Ghana

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Macro-and Microelement Contents of Fruiting Bodies of Wild-Edible Mushrooms Growing in the East Black Sea Region of Turkey

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Food and Nutrition Sciences 2011年第2期2卷 53-59页

作者： Faik A.Ayaz Hülya Torun Ahmet Colak Ertugrul Sesli mark Millson Robert H.Glew Department of Biology Karadeniz Technical UniversityTrabzonTurkey Department of Chemistry Karadeniz Technical UniversityTrabzonTurkey Department of Biology Education Karadeniz Technical UniversityTrabzonTurkey National Institute of Occupational Health and Safety(NIOSH) CincinnatiOhioU.S.A Department of Biochemistry and Molecular Biology School of MedicineUniversity of New MexicoAlbuquerqueNew MexicoU.S.A

Eleven different wild-edible mushroom species growing in the Black Sea region of Turkey were analysed for their metal content. Specimens of mushrooms were gathered in Trabzon, Giresun and Ordu and analyzed for 31 minerals, four of which (Be, Sb, Te and Ti) were not detected. Whereas some minerals including Ag, As, Cd, La, Mo, pb, Se, Y and Zr were detected in just a few mushroom species, another 18 minerals were found in all 11 species. All metal concentrations were expressed on a dry weight basis (d.w.). With regard to nutritionally important amounts of essential and trace minerals, the metal content (μg/g d.w.) of mushroom samples ranged from 21,800-39,800 for K, 2590-14,000 for P, 268-1600 for Ca, 561-1210 for Mg, 74-829 for Fe, 11.2-321 for Cu, 36.2-241 for Zn, 14.1-76.5 for Mn and 0.13-2.85 for Co. Small amounts of toxic metals such as As, Cd and pb were found in all 11 mushroom species. L. laccata contained a large amount of As (145 μg/g d.w.). These results show that the investigated mushrooms can be a useful component for human diets because of their high content of many essential minerals and trace elements and low content of toxic metals.

关键词： Wild-edible Mushrooms Mineral content Toxic Metals Trace Elements Turkey

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塔吉克盆地东北缘海相-风成沉积序列与中亚晚始新世-早中新世干旱化的初步研究

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中国科学：地球科学 2016年第5期46卷 674-690页

作者：王鑫 Brian KRAATZ Jin MENG Barbara CARRAPA Peter DECELLES mark CLEMENTZ Sherzod ABDULOV 陈发虎兰州大学资源环境学院西部环境教育部重点实验室兰州730000 Western University of Health Sciences Pomona 91766 USA American Museum of Natural History New York 10024 USA Department of Geosciences University of Arizona Tucson 85721 USA Department of Geology and Geophysics University of Wyoming Laramie 82071 USA Institute of Geology Earthquake Engineering and Seismology of the Academy of Sciences Dushanbe 734063 Tajildstan 青藏高原地球科学卓越创新中心北京100101

新生代亚洲内陆干旱化的时空演化历史及其驱动机制,是国际古环境研究的热点和重点,然而至今缺少直接来自中国境外干旱区的新生代干旱化记录.对塔吉克盆地东北缘代表性剖面的沉积相分析结果表明,该地区早新生界地层底部以副特提斯海沉积... 详细信息

新生代亚洲内陆干旱化的时空演化历史及其驱动机制,是国际古环境研究的热点和重点,然而至今缺少直接来自中国境外干旱区的新生代干旱化记录.对塔吉克盆地东北缘代表性剖面的沉积相分析结果表明,该地区早新生界地层底部以副特提斯海沉积序列为主,中部为厚层风成砂与河流砂交互沉积,上部以风成黄土、砂黄土状堆积为主,顶部为河湖相沉积和风成黄土状堆积交互沉积.根据已发表的火山灰U-pb年代、初步的古地磁年代框架及区域地层划分证据,风成砂和黄土、砂黄土状堆积物形成于晚始新世和渐新世,表明中亚的干旱环境可能从始新世晚期已经开始,其形成和发展与构造活动驱动的晚始新世副特提斯海退缩密切相关.

关键词：塔吉克盆地东北缘早新生代风成沉积副特提斯海中亚干旱化

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海水体系中矿物颗粒对210pb,210Po和207Bi的吸附

海水体系中矿物颗粒对210Pb,210Po和207Bi的吸附

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中国化学会第30届学术年会

作者：王锦龙杜金洲 mark Baskaran 华东师范大学河口海岸学国家重点实验室 Department of Geology Wayne State University

pb,Po和Bi在海洋环境过程和放射生态学研究中有重要的意义。本文利用Bi代替Bi,研究了在海水条件下,pb,Po和Bi在海洋沉积物、河口沉积物、伊利石、高岭石、蒙脱石、云母岩片、花岗岩、螃蟹壳中的甲壳素、MnO矿石、化学品MnO、化学品FeO... 详细信息

pb,Po和Bi在海洋环境过程和放射生态学研究中有重要的意义。本文利用Bi代替Bi,研究了在海水条件下,pb,Po和Bi在海洋沉积物、河口沉积物、伊利石、高岭石、蒙脱石、云母岩片、花岗岩、螃蟹壳中的甲壳素、MnO矿石、化学品MnO、化学品FeO和赤铁矿颗粒物中的吸附。实验结果表明:pH为5时,颗粒物对核素的吸附最弱,为8时吸附最强;高盐度比低盐时吸附能力要强;吸附在2小时后吸附能力缓慢增加。在室温,pH为8.0,盐度为27.5的海水体系下,pb,Po和Bi在不同颗粒物中吸附2小时的吸附分配系数(K)分别为(0.0155-2.20),(0.039-0.269),和(0.00972-2.41)×10ml g。其中,海洋沉积物对三个核素的吸附性能力最强,花岗岩对pb和Bi的吸附最弱,而蒙脱石对Po的吸附性能最弱。pb和Bi分馏比(F)在0.9和1.8之间;pb、Bi与Po的分馏较好,除了氧化铁和河口沉积物的分馏比(F和F)为.0,其他矿物的F和F都大于2或者小于0.5。此实验结果有助于我们对pb,Po和Bi在海洋学中应用的认识和理解。

关键词：海水 210pb-210Bi-210Po 矿物颗粒分配系数分馏

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A Baseline Study on the Quality and Safety of Consumption of a Pest Species(Sarotherodon melanotheron)in Bataan,Philippines:Basis for Its Productive Utilization in the Fisheries Sector

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Journal of Fisheries Science 2022年第1期4卷 68-76页

作者： Adrian Perdio Rowena Valerio Alvin James Gonzales Delia Llave mark June Consigna Marlon Turtur Department of Arts and Sciences Bataan Peninsula State University-MainCity of BalangaBataanPhilippines College of Technology Bataan Peninsula State University-MainCity of BalangaBataanPhilippines Institute of Fisheries and Aquatic Sciences Bataan Peninsula State University-OraniOraniBataanPhilippines

The baseline study profiled Black-chin Tilapia(***),a fish farm pest species in Bataan,Philippines,in terms of yield(processing and fillet),proximate composition(moisture,ash,crude fat,and crude protein),heavy metal load(cadmium[Cd],lead[pb],arsenic[As],and mercury[Hg]),and microbial count(aerobic plate,Escherichia coli,and Staphylococcus aureus counts).The purpose was to establish the species’safety and quality for consumption and potential utilization in the processing of higher value fishery products.A completely randomized experiment using two factors,fish size(standard and small sizes)and collection season(dry and wet seasons),was *** collected data were also compared against food consumption and processing standards and/or previous reports on more valuable *** results showed that the species has a comparable yield and mineral load with the more popular farmed Nile Tilapia(Oreochromis niloticus).It has high moisture and protein *** is a lean fish that can serve as a cheaper functional raw material for processed fishery ***,the results showed that the species have no As,Cd,and pb contamination,although traces of Hg,far below the permissible limits,were *** Hg load varies across collection season and fish maturity suggesting its *** the microbial contents,the species’aerobic plate,Escherichia coli,and Staphylococcus aureus counts were far below the standard limits,although best post-capture practices are still suggested due to the kind of microbial parameters *** was concluded that the Sarotherodon melanotheron infesting Bataan farm ponds can be consumed safely and has the quality of potential raw material for processed fishery ***,further information is still needed to establish the best post-capture handling on the ***,more studies must be done to determine the impact of storage and processing on its stability.

关键词： Tilapia Black-chin Tilapia Sarotherodon melanotheron Proximate composition Heavy metal load Microbiological quality Orani Bataan

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流感病毒聚合酶PA亚基与pb1多肽复合体的精细三维结构

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中国基础科学 2009年第2期11卷 24-26页

作者：贺晓静周杰 mark Bartlam 张荣光马建源娄志勇李雪梅李晶晶 Andrzej Joachimiak 曾宗浩葛若雯饶子和刘迎芳中国科学院生物物理研究所生物大分子国家重点实验室南开大学生命科学院美国阿贡国家实验室结构基因组学和结构生物学中西部地区中心清华大学结构生物学实验室新加坡国立大学生物科学院

近年来禽流感病毒疫情的发生给全球带来了重大威胁。对流感病毒蛋白,特别是流感病毒RNA聚合酶复合体的结构生物学研究对揭示病毒复制机制以及开展相关药物设计都具有重大意义。流感病毒RNA聚合酶是由pb1、pb2以及PA亚基组成的负责流感... 详细信息

近年来禽流感病毒疫情的发生给全球带来了重大威胁。对流感病毒蛋白,特别是流感病毒RNA聚合酶复合体的结构生物学研究对揭示病毒复制机制以及开展相关药物设计都具有重大意义。流感病毒RNA聚合酶是由pb1、pb2以及PA亚基组成的负责流感病毒的RNA合成以及维持病毒生命周期至关重要的分子机器。其中,pb1是该聚合酶的RNA合成亚基,pb2负责获取宿主mRNA用于病毒mRNA合成,而PA亚基功能则不清楚。本研究报道了来源于禽流感病毒RNA聚合酶PA亚基羧基端与pb1氨基端短肽复合体的三维晶体结构。该结构揭示了PA与pb1亚基相互作用方式,并分析了PA分子在RNA结合等方面的功能,对进一步研究PA功能以及开展针对聚合酶PA分子的药物设计具有十分重大的意义。

关键词：禽流感 RNA聚合酶复合体 PA pb1晶体结构

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DIRECT DATING OF LEFT-LATERAL SLIP ALONG THE RED RIVER SHEAR ZONE

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地学前缘 2000年第S1期7卷 275-275页

作者： Lisa Gilley 1, T. mark Harrison 1,F.J. Ryerson 2,P.H. Leloup 3,Wang Jianghai 4(1 Department of Earth and Space Sciences & IGPP, UCLA, Los Angeles, CA, 90095\|1567, USA. 2 Institute of Geophysics & Planetary Physics, Lawrence Livermore N

The Red River Shear Zone (RRSZ), which extends from eastern Tibet to the South China Sea, plays a central role in the hypothesis that strike\|slip extrusion of Indochina accommodated a significant portion of Indo\|Asian convergence. The massifs of the RRSZ, the only known mid\|crustal section exposed through a transform plate boundary, contain high\|grade metamorphic rocks that are believed to have been plastically deformed in a left\|lateral sense during the mid\|Tertiary. While the history of diachronous transtension along the RRSZ was previously obtained for temperatures below the brittle\|ductile transition from argon thermochronometry, the precise timing of high temperature deformation and the magnitude of strain have not been directly determined. This is a significant limitation to testing the extrusion model as magnetic anomalies from the South China Sea, interpreted to be a pull apart basin at the SE termination of the RRSZ, specifically predict that slip occurred between 35～17Ma at a rate of 3～5cm/a.

关键词： the Red River Shear Zone Ailao Shan Day Nui Con Voi Th\| pb monazite

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TWO PHASES OF CENOZOIC DEFORMATION IN NORTHEASTERN TIBET: THRUSTING FOLLOWED BY STRIKE-SLIP FAULTING

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地学前缘 2000年第S1期7卷 294-294页

作者： Matt S. Spurlin 1, Yin An 1, T. mark Harrison 1, Brian K. Horton 1,3 , Zhou Jiangyu 2, Wang Jianghai 2(1 Department of Earth and Space Sciences, University of California, Los Angeles,CA 90095\|1567 USA, E\|mail mspurlin@ucla.edu 2 Guangzhou

In order to establish deformation history for the Cenozoic development of the Tibetan Plateau, we conducted geologic mapping along a 120km traverse between Nangqian and Yushu in the northeastern Qiangtang terrane. This work reveals a complex interaction among Tertiary thrusting, strike\|slip faulting, sedimentation, and igneous activity. Two phases of deformation are recognized. The older northeast—southwest shortening, expressed by thrusting and folding, is followed by left\|slip faulting along northwest\|trending faults. Tertiary thrusts, predominantly southwest\|dipping, are distributed throughout the traverse, and typically juxtapose Mesozoic strata over Paleogene strata. The latter were deposited in several separated basins during folding and thrusting, as indicated by well\|developed growth strata. A preliminary construction of balanced cross\|sections suggests a minimum estimate of 45km of crustal shortening along the traverse. Numerous hypabyssal intrusions were mapped in the southern part of the traverse near Nangqian. They were emplaced into the Paleogene sediments and are dated between 36 and 33Ma by 40 Ar/ 39 Ar and U\|pb methods. Paleogene sediments are also interbedded with volcanics in both the southern and northern parts of the study area. In the northernmost part of the traverse, a volcanic unit overlies a Tertiary thrust. This unit itself is broadly folded. This relationship suggests that Tertiary igneous activity was coeval with contractional deformation in the region, implying strongly the causal relationship between the two processes. The youngest event in the area is the development of northwest\|trending left\|slip faults. They cut Tertiary thrusts, folds, and about 35Ma igneous intrusions. In contrast to widely distributed Tertiary folds and thrusts, strike\|slip faulting is restricted only to the southern portion of our mapped area near Nangqian. The strike\|slip faults apparently control the distribution of modern drainage systems, suggesti

关键词： thrusting strike\|slip Cenozoic igneous activity sed imentation Qiangtang Tibet

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