曾贻善
水热流体地球化学和水一岩相互作用
个性化签名
- 姓名:曾贻善
- 目前身份:
- 担任导师情况:
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学术头衔:
博士生导师
- 职称:-
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学科领域:
地球化学
- 研究兴趣:水热流体地球化学和水一岩相互作用
曾贻善,汉族,1938 年4 月生广东兴宁人北京大学地质系教授博士生导师。1961年毕业于北京大学地质地理系地球化学专业,后留校工作。60 年代初曾在中国科学院地球物理研究所和地质研究所进修;70 年代末曾在美国斯坦福大学地质系进修。2003 年退休。
在地球化学教研室一直从事实验地球化学和矿床地球化学的教学和科学研究,也曾参与矿物晶体人工合成的工作。主要研究方向是:水热流体地球化学和水一岩相互作用。所负责的科研项目“热水溶液中铁的运移形式”曾获国家教委科技进步奖二等奖(l993) ;所编著的教材“实验地球化学”曾获地矿部优秀教材奖一等奖( 1993 )。
主要著作:曾贻善(1987)《 实验地球化学》 北京大学出版社417页。曾贻善(1993)地质出版社《 热水溶液中化学元素的迁移形式》 198 页。曾贻善(2003)实验地球化学(第2 版)北京大学出版社343 页。
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曾贻善
,-0001,():
-1年11月30日
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【期刊论文】Short-chain carboxylates in high-temperature ore fluids of W-Sn deposits in south China
曾贻善, YISHAN ZENG, * JIAQI LIU and YONGFENG ZHU
Geochemical Journal, Vol. 36, pp. 219 to 234, 2002,-0001,():
-1年11月30日
The Xihuashan, Dangping and Piaotang deposits in the Jiangxi Province, south China can be considered as typical high-temperature hydrothermal quartz vein-type W-Sn mineralization, that is temporally and spatially related to Mesozoic S-type granite. Microthermometric studies of fluid inclusions in various minerals from these deposits were conducted to obtain homogenization temperature and salinity data. Major organic and inorganic aqueous components of the fluid inclusions were extracted by a crush-leaching, and concentrations of short-chain carboxylate (formate, acetate, propionate, oxalate), fluoride, chloride and sulfate anions in the leachates were determined using ion chromatography. The results indicate the presence of formate and acetate as well as minor amounts of oxalate and propionate in leachates, and the dominance of formate over other carboxylates. The molar ratio of acetate to formate appears to be a potential indicator of the redox state for the ore fluid system. Oxygen and hydrogen isotopic data show that inclusion water in quartz is mainly magmatic in origin. It is postulated that the dissolved carboxylate anions in the ore fluids for the deposits probably were generated by the breakdown of kerogen in "primitive sedimentary rocks" during the formation of S-type granites. The possibility of inorganic synthesis of the carboxylate species in a C-H-O system can not be excluded.
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【期刊论文】300℃, 500 bar时MH缓冲组合在HCl水溶液中的溶解度研究
曾贻善, 艾瑞英, 王凤珍
中国科学 (B), No.6, 639-645 (1997).,-0001,():
-1年11月30日
本文于300℃,500bar时,用金袋式热液设备测定了MH(磁铁矿+赤铁矿)缓冲组合在HCl水溶液中的溶解度。计算了热水溶液中离子的活度,并用岭回归和叠代的方法处理实验数据,与多种可能的Fe存在形式模型拟合。结果表明,实验溶液中的Fe主要成FeOH+存在。求得MH组合溶解反应的平衡常数K=57.161。计算了0f,FeOH+ΔG=260.3kJ/mol。300℃时,在地质上可能的pH和氯化物浓度条件下,热液中的Fe主要成羟络合物存在。
磁铁矿+, 赤铁矿缓冲组合,, 溶解度,, HCl热液,, Fe存在形式,, 形成自由能
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【期刊论文】Experimental investigation of yugawaralite-wairakite equilibrium
曾贻善, Yishan Zeng and J. G. Liou
Amer. Mineral., 67, 937-943 (1982).,-0001,():
-1年11月30日
Yugawaralite (CaAl2Si6O16.4H2O) occurs most commonly in active geothermal areas and is associated with other zeolites including laumontite and wairakite. The stability field of yugawaralite was experimentally investigated using conventional hydrothermal apparatus over a p-T range of 200-350℃ and 0.25―2 kbar and run duration of 14 to 61 days. The reversal experiments indicate that the p-T curve of the reaction yugawaralite = wairakite + 2SiO2 + 2H2O passes through 225±5℃ at 0.25 kbar, 233±5℃ at 0.5 kbar, 238±5℃ at 1 kbar and 245±5℃ at 2 kbar pfluid. The thermodynamic parameters of yugawaralite were calculated: 0 ΔSf = -2175.46±12.01 J/mol-K, 0 f ΔG = -8387.69±4.01 kJ/mol, 0 f ΔH =-9036.19±4.01 kJ/mol. The equilibrium curve, yugawaralite = laumontite + 2SiO2, was estimated by employing the thermodynamic data and the calculated slope of 31.3 bars/℃. Present and previous experiments define an invariant point where yugawaralite, wairakite and laumontite are stable. The invariant point was located at 234℃ and 550 bars in experimental conditions where H2O p =ptotal. In geothermal systems where H2O p is about 1/3 H2O p, the occurrence of yugawaralite is restricted to depths not much greater than 0.5 km. This result is consistent with its limited occurrence in active geothermal areas.
Yugawaralite,, wairakite,, phase equilibrium,, thermodynamic parameters.,
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曾贻善, 姜士军
地质科学 31,90-95 (1996),-0001,():
-1年11月30日
为了研究金在黄铁矿表面沉淀的机理,于室温、常压,在氯化物溶液中进行了黄铁矿粉末吸附金的实验。在不同pH 的溶液中,黄铁矿均可吸附金,而且pH 值明显地影响吸附速率。扫描电镜观察表明,反应后黄铁矿粒表面有金晶体形成。XPS研究得知,黄铁矿光片与含金氯化物溶液反应后表面有Auo存在;硫在反应初期为S0、2-2 3 O S,随后转变为- 24SO,而铁成为Fe3+。黄铁矿中的Fe2+和-22S是溶液中金的还原剂。金在黄铁矿表面沉淀可能涉及吸附、还原和晶体生长等过程。
金 黄铁矿 吸附作用 界面反应
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曾贻善, Yishan Zeng, Ruiying Ai and Yongfu Ai
,-0001,():
-1年11月30日
The interactions between andesine grains (0.25―0.45 mm) and NaCl and KCl+NaCl solutions were experimentally studied under flow-through conditions (flow rates of solution: 7 ml/h and 1 ml/h) at 300oC and 50 MPa. For comparison, corresponding static runs were performed at the same pressure and temperature. All of these experiments were carried out in a flexible gold cell hydrothermal apparatus. The emphasis of the present study was laid on the changes in the composition of solid surface and solution chemistry at the early stage of the interaction. After the reaction an appreciable amount of etch pits and crystallites of alkali-rich feldspar appeared on the surface of the andesine. The statistical treatment of the SEM/EDAX data for the surface of the mineral reacted showed an increase in the atomic ratio of Si/Al, (K+Na)/Ca and (K+Na)/Al and a decrease in the ratio of Ca/Al, compared with the starting andesine. During the interactions, pH of solutions increased and considerable amounts of Si and Ca were transferred into the aqueous phase. In the NaCl solution experiment at a flow rate of 7 ml/h, the variations of the Si, Al, Ca and K concentration with time were very distinct. The static or "low" flow rate (1 ml/h) reaction conditions and the presence of KCl in solution seemed to hinder the release of Si in andesine to aqueous solution. It is concluded that alkali-metasomatism of andesine at flow-through condition involves the dissolution of the mineral, and the formation of alkali-rich feldspar.
NaCl and KCl+, NaCl aqueous solutions,, andesine,, solution-mineral interaction,, flow-through experiment,, titanium-gold hydrothermal apparatus,, alkali-metamorphism.,
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【期刊论文】Short-chain carboxylates in fluid inclusions in minerals
曾贻善, Yishan Zeng a, *, Jiaqi Liu b
Applied Geochemistry 15(2000)13-25,-0001,():
-1年11月30日
The carboxylate (formate, acetate, propionate and oxalate) and common inorganic anions (F-, Cl- and SO2-4) compositions for aqueous fluid inclusion leachates from 17 mineral samples collected from various deposits have been determined using ion chromatography in conjunction with microthermometric measurements on the fluid inclusions of their host minerals. The minerals, quartz, fluorite, barite, beryl and a fewore' minerals (wolframite, pyrite and galena), came from hydrothermal vein-type deposits in felsic igneous rocks or Archean metamorphic rocks. The results indicate that short-chain carboxylates are common components in hydrothermal fluids and can be present in considerable amounts. Formic acid (as formate) is the dominant species over other carboxylic acids. The present study raises new questions about the origin and geochemical significance of carboxylates in hydrothermal ore-forming processes.
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【期刊论文】Carbonaceous Material in S-type Xihuashan Granite
曾贻善, Yishan Zeng, Yongfeng Zhu and Jiaqi Liu
,-0001,():
-1年11月30日
In order to verify the presence of residual organic matter in some S-type granites, a method used conventionally in petroleum geochemistry for isolation of kerogen was employed to separate carbonaceous material (CM) from the Xihuashan granite, Jiangxi Prov., China. Optical, XRD and SEM/EDAX analyses identified the acid-insoluble residue as mainly composed of various mineral debris, with a minor carbonaceous fraction found in the residue. LMR and micro-FTIR studies showed that the residue contained a small amount of CM, which is heterogeneous in composition and structural state. The occurrence of CM in the granite implies that this granitic magma originated from sediments and crystallized at relatively lower temperatures and high pressures. This deduction is consistent with geological and geochemical studies of the Xihuashan granite. A tentative model was suggested which connects CM in S-type granite with organic matter in sedimentary rocks. The conditions under which CM can be preserved in S-type granite are discussed. The occurrence of some heavy hydrocarbons is expected in the Xihuashan granite.
S-type Granite,, Carbonaceous material,, Xihuashan,, Terrestrial carbon cycle.,
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曾贻善, 刘家齐
,-0001,():
-1年11月30日
利用石油地球化学的溶剂抽提技术和气相色谱技术研究了北京延庆碓臼峪花岗岩(深源花岗岩)样品中的可溶有机质,同时利用高温处理过的石英砂进行空白对比实验。结果表明,所研究的两个花岗岩样品中存在少量的高碳数或碳氢化合物,且具有相同的成分特征,这为自然界存在深源的长链或碳氢化合物提供了新的证据,也为解释花岗岩浆演化晚期水热流体中短链羧酸的成因提供了线索。
深源花岗岩, HCS, 溶剂抽提, 气相色谱
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