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An Experimental Calibration on the Sphalerite-Galena Sulfur Isotope Geothermometer

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Acta Geologica Sinica(English Edition) 2003年第4期77卷 519-521页

作者： DING Tiping, zhang Chengxin, WAN Defang, LIU Zhijian and zhang {2. {3. of{4. Resources, chinese Academy of geological Sciences, 2. Baiwanzhuang Rd.,Beijing 10003. institute of mineral Resources Chinese Academy of Geological Sciences 26 Baiwanzhuang Rd. Beijing 100037

A new experimental calibration was undertaken in this study to get a more reliable sphalerite-galena sulfur isotope geothermometer. The experimental conditions selected in study were very similar to those of natural hydrothermal solution. The high-precision SF6 method was used in sulfur isotope analyses. The obtained calibration curve for sulfur isotope fractionation between sphalerite and galena can be expressed with the equation 10001nαSp-Gn= 0.74.106T-2.0.08.

关键词： sulfur isotopes isotope geothermometer SF6 method sphalerite galena

Gymnosperms on the eve of the terminal Permian mass extinction in North China and their survival strategies

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chinese Science Bulletin 1998年第11期43卷 889-897页

作者： WANG Ziqiang+1 and zhang Zhiping+2. 1. Tianjin institute of Geology and {2. Resources, {4. Academy of {4. Sciences, Tianjin 3.0170, China 2. Tianjin Centre of Physical and Chemical Techniques, Tianjin 3.0050, China Tianjin institute of Geology and mineral Resources Chinese Academy of Geological Sciences Tianjin China Tianjin Centre of Phyhical and Chemical Techniques Tianjin China

Main characteristics of the Permian redbed gymnosperms in North China have been summarized: dominant peltasperms and conifers, numerous enigmatics such as Gigantonoclea and Psygmophyllum, and abundant precursors of Mesozoic gymnosperms. Furthermore, stresses affecting these plants survival are suggested to be paleoatmospheric CO-2.concentration, water stress, wind and fire activities, and fungal infection. Consequently, a preliminary analysis accounts for the ecological strategies of these gymnosperms to the P-Tr event.

关键词： North China Permian gymnosperms mass extinction.

Northernmost paleo-tethyan oceanic basin in Tibet:Geo-chronological evidence from ^(4.)Ar/^(3.)Ar age dating of Dur'ngoi ophiolite

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chinese Science Bulletin 2001年第14期46卷 1203-1205页

作者： CHEN Liang, SUN Yong, PEI Xianzhi, GAO Ming, FENG Tao, zhang Zhongqing & CHEN Wen1. Laboratory of Continental Dynamics, Northwest University, Xi’an 710069, China 2. Department of Geology, Northwest University, Xi’an, 710069, China 3. institute of Geology, {2. Academy of geological Sciences, Beijing, 10003., China Laboratory of Continental Dynamics Northwest University Xi’an China Department of Geology Northwest University Xi’an China institute of Geology Chinese Academy of Geological Sciences Beijing China

Whole rock 4.Ar/3.Ar age dating has been conducted on a basalt sample from Dur’ngoi ophiolite, Qinghai Province, which was reported to be the northernmost pa-leo-tethyan oceanic basin in Tibet. A high temperature pla-teau age (3.5.3.7.9 Ma) with an isochorn age (3.6.6±7.1 Ma) has been obtained, representing the eruption time of oceanic crust Considering related {4. settings, the new age provides constraints on the northernmost pa-leo-tethyan suture zone in Tibet and the tectonic evolution of Paleo-tethys in Northeast Tibet and adjacent areas.

关键词： Dur’ngoi ophlolite 4.Ar -3.Ar age Paleo-tethys.

Southeastern extension of the Red River fault zone (RRFZ) and its tectonic evolution significance in western South China Sea

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Science China Earth Sciences 2006年第8期49卷 839-850页

作者： LIU Baoming1,2.3. XIA Bin1, LI Xuxuan1,3. zhang Minqiang1,3. NIU Binhua2. ZHONG Lifeng1, JIN Qinghuan1,4.& JI Shaocheng1,5 1. Key Laboratory of Marginal Sea Geology and Resources, {3. Academy of Sciences,Guangzhou 51064., China 2. China University of Geosciences (Beijing), Beijing 100083. China 3. Research Center of Science & Technology Department, CNOOC, Beijing 10002., China 4. Guangzhou Marine {2. Survey, Ministry of Land & Resources, Guangzhou 510075, China 5. Ecole Polytechnique Montreal, H3.3.7, Canada 1. Key Laboratory of Marginal Sea Geology and Resources Chinese Academy of Sciences Guangzhou 510640 China 2. China University of Geosciences (Beijing) Beijing 100083 China 3. Research Center of Science & Technology Department CNOOC Beijing 100027 China 4. Guangzhou Marine geological Survey Ministry of Land & Resources Guangzhou 510075 China 5. Ecole Polytechnique Montreal H3C3A7 Canada

Recent geophysical surveys and basin modeling suggest that the No.1 fault in the Ying- gehai basin (YGHB) is the seaward elongation of the Red River fault zone (RRFZ) in the South China Sea (SCS). The RRFZ, which separates the South China and Indochina block, extends first along the Yuedong fault, offshore of Vietnam, and then continues southward and breaks off into two branches: the Lupar fault and the Tinjia fault. The southern extension of the Lupar fault dies out beneath the NW Borneo while the Tinjia fault extends southeast and reaches the Brunei-Sabah area. According to the gravity and geomagnetic data, and the tectonic evolution of the basins, there are different evolution histories between the Wan’an basin (WAB) and the basins in the Nansha block. The Tinjia fault may be the boundary between the Balingian block and the Nansha block. Hence, the line linking the Yue- dong fault and the Tinjia fault, which both are continental margin faults and strike-slip ones in the geological evolution histories, constitute the boundary between the Indochina and Nansha block. The Lupar fault, in contrast, is an intraplate fault within the Indochina block. The results provide new hints for reconstructing the tectonic evolution history of the RRFZ and the opening of the SCS, and also a framework for hydrocarbon prospecting in the region.

关键词： Red River fault zone, tectonic evolution, fault, extension, western South China Sea.

Kinetics of ore-forming fluids in epithermal systems

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chinese Science Bulletin 1999年第S2期44卷 5-6页

作者： zhang Ronghua, zhang Xuetong and HU Shumin Open Research Laboratory of Geochemical Kinetics, {2. of {3.{4., chinese Academy of geological Sciences, Beijing 10003., China Open Research Laboratory of Geochemical Kinetics Institute of Mineral Deposits Chinese Academy of Geological Sciences Beijing 100037 China

As verified by the data of fluid inclusions in minerals in some paleo-hydrothermal systems, a lowering intemperature of the ore-forming fluids and a decrease in salinity occurred simultaneously from the centralzone （deep part） of the deposit profile to its outer zone （shallow part）. The usual situation shown byexperimental data is that solubility rises with an increase in temperature, as shown by quartz and manyore minerals. However, the solubility of some minerals increases as the temperature decreases within acertain temperature range. Therefore, continuous deposition cannot be achieved as the temperature of thesystem decreases, as in the cases of calcite, fluorite, and anhydrite. In water and NaCl-H{3./sub>O systems,the solubility of calcite （or anhydrite） decreases with a rise in temperature at 3.0℃ (or 4.0℃

关键词： kinetics ore-forming fluids epithermal systems.

Development of Zr/ZrO_2.high temperature and high pressure sensors for in-situ measuring chemical parameters of deep-sea water

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Science China(Technological Sciences) 2009年第8期52卷 2466-2473页

作者： zhang XueTong, zhang RongHua, HU ShuMin & WANG Yong Open Research Laboratory of Geochemical Kinetics, {2. of {3. Resources,{4. Academy of geological Sciences, Beijing 10003., China Open Research Laboratory of Geochemical Kinetics Institute of Mineral Resources Chinese Academy of Geological Sciences Beijing 100037 China

In order to in situ measure chemical parameters of deep-sea water and hydrothermal fluids at midocean ridge(MOR), it is necessary to use high temperature and high pressure chemical *** new sensors is essential to measure in-situ pH and other chemical parameters(dissolved H2. dissolved H2.) of deep-sea water and hydrothermal fluids in a wide temperature range(2.―4.0℃) at MOR *** YSZ(Yttria Stabilized Zirconia, 9%Y2.{4. ceramic-based(HgO/Hg) chemical sensors possess excellent electrochemical properties at high temperatures, which have been used to measure chemical parameters of hydrothermal fluids above 2.0℃.A novel Zr/ZrO2.oxidation/reduction electrode was constructed by oxidation of Zr wire in Na2.O{4.*** Zr/ZrO2.electrode has good chemical stability while measuring pH of high-temperature aqueous solutions, combined with a Ag/AgCl reference *** of the Zr/ZrO2.sensor in association with a Ag/AgCl reference electrode vary linearly with pH over a wide pH range, as tested by various NaCl-HCl-H2. solutions(NaOH-NaCl-H2. for basic solutions), at temperatures in the range of 2.℃―2.0℃.Thus, the Zr/ZrO2.sensors can be utilized in monitoring the fluids over the temperature range of 2.―2.0℃.The Zr/ZrO2.electrode combined with Ag/AgCl, Ag/Ag2., and Au electrodes has been used to measure pH and other chemical parameters(dissolved H2. dissolved H2.) of aqueous fluids from low to high temperatures and high pressures in the laboratory and to monitor those parameters of deep-sea water in South China Sea.

关键词： Zr/ZrO2 sensor melt oxidation method high temperature and high pressure chemical parameters investigation in the deep ocean

电弧微铸锻复合增材制造GH4.69D高温合金的显微组织与力学性能

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金属学报 2024年第5期60卷 681-690页

作者：曾立王桂兰张海鸥翟文正张勇张明波华中科技大学材料成形与模具技术国家重点实验室武汉430074 华中科技大学数字制造装备与技术国家重点实验室武汉430074 中国航发北京航空材料研究院北京100095

GH4.69D合金作为一种新型的高力学性能和高稳定性的镍基高温合金,在用于制造高性能复杂结构零件方面具有巨大应用价值,但该合金在电弧增材制造中表现出柱状晶粗大、力学性能各向异性等问题。本工作采用电弧微铸锻复合增材制造(hybrid ar... 详细信息

GH4.69D合金作为一种新型的高力学性能和高稳定性的镍基高温合金,在用于制造高性能复杂结构零件方面具有巨大应用价值,但该合金在电弧增材制造中表现出柱状晶粗大、力学性能各向异性等问题。本工作采用电弧微铸锻复合增材制造(hybrid arc and micro-rolling additive manufacturing,HARAM)技术成形GH4.69D高温合金试块,并制定多种热处理制度对所成形的试块进行热处理。运用OM、SEM、EBSD、EDS、XRD、TEM等手段以及室温拉伸实验对合金的微观组织和力学性能进行观测和分析,并与常规电弧熔丝增材制造(wire and arc additive manufacturing,WAAM)方法成形的GH4.69D合金进行对比。结果表明,HARAM技术中同步轧制的“微锻”作用能有效地使合金原本粗大的柱状晶发生“破碎”。与常规WAAM方法相比,采用HARAM技术所成形合金的室温抗拉强度提高(X向提高4. MPa,Z向提高90 MPa),力学性能的各向异性得到有效抑制。均匀化+固溶+双时效热处理有效消除了HARAM技术成形合金中的Laves偏析相,并促进受“微锻”作用的合金组织发生再结晶,使晶粒比未热处理时更为细小均匀,合金的综合力学性能达到最优(抗拉强度和断后延伸率X向为13.6 MPa和2..0%,Z向为13.4.MPa和2..6%)。

关键词：增材制造电弧微铸锻 GH4.69D高温合金热处理显微组织力学性能

The Mechanism of Structural Control of Ore Formation and Geochemical Characteristics in the Massive Sulfide deposits of the Wushan Copper Ore Field,Jiangxi

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Acta Geologica Sinica(English Edition) 1990年第3期64卷 261-274页

作者： Liu Xun institute of Geomechanics, chinese Academy of {2. Sciences, Beijing {3. Zhongmin institute of Geomechanics Chinese Academy of Geological Sciences Beijing

The ore-controlling mechanism of the bedding fault system in the massive sulfide deposits of the Wushancopper orefield may be generalized as the control of ore deposition by optimum surface in an ore-formingstructural trap. The mechanism has three major features: (1) timing of mineralization; (2. positioning of hostformation; and (3. dependence of ore-controlling structure on properties of rocks. The 'optimum surface' is adivisional structural plane which marks obvious difference in physical, chemical and mechanical properties andis favorable for mineralization. It is also a unity of structures. lithofacies and orebodies. The structural and geochemical characteristics of the ore deposits indicate the migration trend of the ma-jor characteristic clements in the ore-controlling fault belt: elements with a small radius (Si, Fe, Mg and Al)moved towards and concentrated at the center of the belt while large-radius ones (Ca, K and Na) were remotefrom the center.

关键词： The Mechanism of Structural Control of Ore Formation and Geochemical Characteristics in the Massive Sulfide deposits of the Wushan Copper Ore Field Jiangxi

Petrogenesis and dating of the Kangding complex,Sichuan Province

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Science China Earth Sciences 2005年第5期48卷 622-634页

作者： CHEN Yuelong 1 , LUO Zhaohua 1 , ZHAO Junxiang, LI Zhihong, zhang Hongfei & SONG Biao 3.1. Faculty of Earth Sciences and Natural Resources, China University of Geosciences, Beijing 100083. China 2. Faculty of Earth Sciences, China University of Geosciences, Wuhan 4.1}074. China 3. Beijing SHRIMP Center, institute of Geology, {2. Academy of geological Sciences, Beijing 10003., China 1. Faculty of Earth Sciences and Natural Resources China University of Geosciences 100083 Beijing China 2. Faculty of Earth Sciences China University of Geosciences 430074 Wuhan China 3. Beijing SHRIMP Center Institute of Geology Chinese Academy of Geological Sciences 100037 Beijing China

An analysis of major and trace element geochemistry and SHRIMP U-Pb zircon dating of mafic, intermediate, and felsic rocks from the Mianning metamorphic complex of Si- chuan Province was conducted. One of our conclusions is that a majority of the zircons crystal- lized between 72. and 773.Ma in a magmatic regime. The complexes contain early to late Pa- leo-proterozoic relict zircons from ancient continental crust. The oldest age, 2.68 Ma, may rep- resent the basement of the Yangtze block. Overgrowth zircon rims and palingenetic zircons have been observed and dated, and are believed to have formed after crystallization, during Paleozoic and Mesozoic metamorphic-anatexis. We also conclude that depletion of Nb, Ta, HREE, in a spider-diagram normalized to primitive mantle and calc-alkaline association, implies that they formed in island-arc or under-plating settings.

关键词： Kangding complex, zircons, SHRIMP, tectonic setting.