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Experimental studies on silicate structures of basaltic glasses quenched at 1 650℃ and 1—3.5 GPa

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Chinese Science Bulletin 1999年第5期44卷 461-466页

作者： ZHUWeiguo, XIEHongsen, XU Jian, HOUWei, ZHANG Yueming, QUO Jie and XU Zhuming Earth ’s Interior Material laboratory, institute of geochemistry, Chinese Academy of Sciences, guiyang 550002, China institute of Earth Science, academia sinica , Taibei, Taiwan, China Earth’s Interior Material laboratory Institute of Geochemistry Chinese Academy of Sciences Guiyang China institute of Earth Science Academia Snica Taibei Taiwan China

A series of melting experiments was carried out at 1 650℃ and 1.00-3.00 GPa using alkaline basalt as starting material. The compositions of quenched basaltic glasses in the products were detected by electron micro probe. Their CIPW norms were calculated and their refractive indices were determined by the oil-infused method. The Raman spectrum of the quenched basaltic glasses indicates that their main structural species are monomer [SiO4]4-, chain [Si2O6]4- and sheet [Si2O5]2- . The relationship at the same temperature between the proportions of integrated areas of structural species, and compositions and pressures was discussed.

关键词： quenched basaltic glass structure of melt Raman spectrum.

Metallogenic mechanisms of super-large Cu and Au deposits in the Dexing region and simulating experiments

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Chinese Journal Of geochemistry 2010年第1期29卷 1-14页

作者： WU Xueyi and WANG Zijiang The State key laboratory of Ore Deposit geochemistry,institute of geochemistry,Chinese Academy of Sciences,guiyang 55002,China The State key laboratory of Ore Deposit geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang China

Based on the results of previous studies and under the direction of the theory of "ore deposit genesis",the authors made use of high temperature and high pressure experimental facilities and conditions at the Tectono-geochemistry Research Room under the State key laboratory of Ore Deposit geochemistry,institute of geochemistry,Chinese Academy of Sciences,and put the focus on the multi-source of tectonically controlling ore-forming materials,the characteristics of multi-stage and multi-episode hydrothermal activities and mineralization and the characteristics of multi-genesis and multi-ore deposition so as to shed light on the metallogenic mechanisms of super-large Cu and Au *** addition simulating experiments were made on multi-stage and multi-episode tectonic activities and rock and ore deformation,multi-stage and multi-episode tectonic activities and mobilization and migration of ore-forming materials,and multi-stage and multi-episode tectonic activities and superimposition and enrichment of ore-forming *** experimental results showed that under the action of multi-stage and multi-episode tectonic stress the deformation and fragmentation of not only rocks and ores have been intensified,and but also the ore-forming materials originally disbursed in the rocks and ores have been mobilized and migrated and superimposed and *** experimental results also provided the scientific experimental data and grounds for deep-going research on the rules of metallogenesis and geneses of super-large ore deposits in the Dexing region,Jiangxi Province.

关键词：成矿机制模拟实验德兴地区金矿床超大型构造地球化学成矿物质来源国家重点实验室

基于金属-有机框架同分异构体构建MOFs相结用以增强CO_(2)光还原活性

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Science China Materials 2024年第6期67卷 1839-1845页

作者：黄海波李兰王瑞 ar Mahammed Shaheer 刘天赋刘海雄曹荣 School of Environmental Science and Engineering Qingdao UniversityQingdao 266071China State key laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China University of Chinese Academy of Sciences Chinese Academy of SciencesBeijing 100049China College of Materials and Chemistry China Jiliang UniversityHangzhou 310018China

利用太阳能将CO_(2)光转化为化学燃料是前沿研究的热点.当前,科研的重点在于开发和优化各类光催化材料的性能.异质结构不仅用于增强无机半导体催化剂的活性,而且用于金属-有机框架(MOFs)光催化剂的构建.随着异质结技术的不断进步,新的... 详细信息

利用太阳能将CO_(2)光转化为化学燃料是前沿研究的热点.当前,科研的重点在于开发和优化各类光催化材料的性能.异质结构不仅用于增强无机半导体催化剂的活性,而且用于金属-有机框架(MOFs)光催化剂的构建.随着异质结技术的不断进步,新的相结概念应运而生.尽管关于无机半导体中的相结研究已取得一定进展,但是MOFs相结结构的探索尚处于起步阶段.本文中,我们成功设计并构建了一种具有卓越光催化CO_(2)还原性能的MOFs相结杂化材料.这种材料由具有高度连接性的卟啉配体(TCPP-Ni)与Zr6团簇紧密结合而成,在溶剂热反应条件下,PCN-222-Ni能够快速且均匀地成核.通过精准调控调节剂的用量,我们实现了同分异构体PCN-224-Ni在类似条件下较慢的晶体形成过程.最终制得的P@P杂化材料展现出高表面积、多孔性和卓越的结晶度.由于PCN-222-Ni和PCN-224-Ni之间的带隙匹配,光生载流子的分离和迁移得以促进,从而使P@P杂化材料展现出卓越的光还原CO_(2)性能.这一重大突破不仅标志着MOFs相结结构研究的重大进展,还拓宽了MOFs相结在CO_(2)光转化领域的应用前景.

关键词： MOFs polymorphism phase-junctions photo-catalytic CO_(2)reduction

ANNUAL LAMINATIONS IN THE SEDIMENTS OF HONGFENG LAkE, CHINA

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Chinese Geographical Science 1996年第4期6卷 375-382页

作者： Wu Fengchang Wan Guojiang(State key laboratory of Environmental geochemistry, institute of geochemistry, the Chinese Academy of Sciences, guiyang 550002, PRC) State key laboratory of Environmental geochemistry Institute of Geochemistry the Chinese Academy of Sciences Guiyang PRC

Hongfeng Lake is an eutrophic freshwater atificial *** began to restore water in 1960. Three sediment cores were taken from both about 25m of water in the center of Hongfeng bake in May 1991. The stratigraphy of the three cores was easily matched .by using prominent marking horizons and characteristic aqnences of laminations. In three layer Samples studied, diatom and other algae taxa appear in repeating apuences. The presence of laminations may reflect either the regular changes of physical-chemical conditions within the lake or the variation in the intensity of erosion and transport of material from the catchment, pat iculaly where instability in the lake-water system has occult as a result of human activities. The larninations were mainly cantal by seasonal variation of envionmental conditions,particularly *** t of the previous examples, they have ben fo￣ at most recent Sediments, in a small freshwater lake in the eastern slOPe of the QinghaiXiZang Plateau, China in a subtropical climate, which is adenly controlled by ￣theastern and southwestern mon￣n. It is believed that it's the first reported instanceOf laminated lake sediments from China.

关键词： annual laminations Hongfeng Lake carbonate geochemistry

Sulphur and Lead Isotope Compositions of the Dajiangping Deposit in Western Guangdong Province

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Acta Geologica sinica(English Edition) 1994年第1期68卷 43-55页

作者： Zhang Qian, Zhang Baogui, Cao Yubo, Pan Jiayong, Zeng Tianyuand Hao Shuzhiinstitute of geochemistry, academia sinica, guiyang, Guangxi institute of geochemistry Academia Sinica Guiyang Guangxi

The Dajiangping pyrite deposit located in the middle sector of the Yunkai uplift in western Guangdong is a stratiform sulphide deposit occurring in Sinian marine clastic and fine clastic rocks. The formation of the deposit was related to submarine exhalation and hot brine deposition. A part of it was reformed by late-stage hydrothermal solution. The δ34S values of pyrite vary from - 25.55‰ to +21.07‰, which are inversely proportional to the content of organic carbon in ore and pyrite. Passing from striped fine-grained pyrite ore to massive coarse-grained pyrite ore, i.e. from south to north, the sulphur isotopic composition changes from the light sulphur-enriched one to the heavy sulphur-enriched one. The lead isotopic composition of striped ore is consistent with that of the country rocks of orebodies and the lead is radiogenic lead derived from the upper crust. The lead isotopic composition of massive ore is relatively homogeneous and its 206Pb/204Pb, 207Pb/204Pb and 208Pb/204Pb ratios are a bit lower than those of striped ore;the lead result from mixing of synsedimentary ore lead with that derived from basement migmatlte brought by late-stage hydrothermal solutions.

关键词： pyrite deposit sulphur isotopic composition lead isotopic composition Yunkar uplift

吉林球粒陨石k.ar年龄与ar^(38)暴露年龄研究

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地球化学 1978年第3期7卷 197-201页

作者： laboratory of k.ar age, guiyang institute of geochemistry academia sinica 中国科学院贵阳地球化学研究所k.ar年龄实验室

大量石陨石的k.ar年龄测定表明其年龄值一般要低于陨石母体的形成年龄，它反映了陨石的气体保留年龄。因此根据k.ar年龄可以研究陨石母体与陨石的受热历史。陨石中ar^38含量的测定可以提供陨石受宇宙射线辐射的时间标度。吉林陨石是目... 详细信息

大量石陨石的k.ar年龄测定表明其年龄值一般要低于陨石母体的形成年龄，它反映了陨石的气体保留年龄。因此根据k.ar年龄可以研究陨石母体与陨石的受热历史。陨石中ar^38含量的测定可以提供陨石受宇宙射线辐射的时间标度。吉林陨石是目前世界上发现的最大的球粒陨石，因而通过对气体保留年龄和宇宙射线暴露年龄研究将为进一步了解球粒陨石的成因与演化史提供重要的资料。本文除对吉林陨石雨的Ⅴ号、Ⅱ号、Ⅰ号陨石进行测定研究外，还对其他三块在我国降落的球粒陨石进行了对比研究。根据球粒陨石的有关资料，我们对吉林陨石的受热历史和母体环境作了分析，并讨论了宇宙空间球粒陨石的形成与消失过程。

关键词：球粒陨石 k.ar年龄 ar^38暴露年龄近邻陨石

ISOTOPIC DATING OF THE METAMORPHIC ROCkS FROM THE MT. JOLMO LUNGMA arEA, CHINA

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Science in China,Ser.A 1973年第3期 385-395页

作者： laboratory of Isotopic Geology, kweiyang institute of geochemistry, academia sinica 中国科学院贵阳地球化学研究所同位素地质研究室

Isotopic ages of seventeen samples, which had been supplied by the Chinese Mountaineering Expedition and the geological group of the Tibetan Scientific Expedition of academia sinica, were measured by k.ar, Rb-Sr and U-Pb methods in 1968. The Jolmo, Lungma Group has undergone at least two major metamorphisms: One occurred in the late Precambrian, about 640—660 m.y. ago, and the other took place in the Tertiary, approximately 10—34 m.y. ago; in the interval between 10—20 m. y., Himalayan orogeny had been intensively developed, associated with abundant granite intrusion and migmatization. In addition, the limestones from the summit of the Mt. Jolmo Lungma are dated for the first time by Pb-isotopic and k.ar methods, suggesting that its isotopic age may be of Ordovician.

关键词： Rb Pb JOLMO LUNGMA arEA CHINA

Evolution of the upper earth crust in the southwest area of Yangtze terrain and its influence on the formation of Carlin-type Au ore deposits

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Chinese Science Bulletin 1999年第S2期44卷 220-221页

作者： CHEN Xiaozhong and LI Chaoyang Open laboratory laboratory of Ore geochemistry, institute of geochemistry, Chinese Academy of Sciences, guiyang 550002, China Open laboratory laboratory of Ore geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

1 Outline of the Yangtze terrain THE northwestern area of Sichuan and the joined area of Yunnan, Guizhou and Guangxi are the two majorfields where lots of Carlin-type Au ore deposits are located. Both of them belong to the western area ofYangtze terrain. The evolution of Yangtze terrain affected profoundly the geological evolution in these areas. Many epithermal ore deposits, such as Carlin-type gold, lead, zinc, mercury, stibium and arsenic,occur in the these areas, due to the evolution of crust in Yangtze terrain. The foundation of Yangtze terrain shows a structure of three stories, mainly composed of the Proterozoic clastic rocks and carbonic rocks that were involved in low-middle grade metamorphose. The meaningof the Yangtze terrain changed according to several geological times, which can be said that the activity ofYangtze terrain changed in the past. The Yangtze terrain undertook several processes of landmass hyper-

关键词： Yangtze terrain extending basin Carlin-type Au ore deposit.

DEVELOPMENT OF NATURAL ENVIRONMENT IN THE SOUTHERN ParT OF LIAONING PROVINCE DURING THE LAST 10,000 YEarS

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Science China Mathematics 1978年第4期 516-532页

作者： laboratory of Quaternary Palynology and laboratory of Radiocarbon, kweiyang institute of geochemistry, academia sinica 中国科学院贵阳地球化学研究所第四纪孢粉组中国科学院贵阳地球化学研究所C~(14)组

According to analyses of sedimentation sequence, sporo-pollen assemblage, and radiocarbon datings of the Holocene deposits in southern Liaoning, a preliminary geological time scalc for the Holocene has been established and a general development of the natural environments during the last 10,000 years has been given. The Holocene can be subdivided into three stages: the Pulantien period of the Early Holocene (about 10,000—8,000 years B. P.), the Takushan period of the Middle Holocene (about 8,000—2,500 years B. P.), and the Chuangho period of the Late Holocene (about 2,500 years B. P.). The history of climatic fluctuation, vegetation, alternation, and shoreline changes indieates that the early Takushan period (about 8,000—5,000 years B. P.) was the warmest and wettest climatic optimum and the high sea-level during the last 10,000 years.

关键词： DEVELOPMENT OF NATURAL ENVIRONMENT IN THE SOUTHERN ParT OF LIAONING PROVINCE DURING THE LAST 10,000 YEarS 丫丫