孙晓明
目前主要从事成矿流体地球化学、海底矿产纳米地球化学和环境地球化学的研究。
个性化签名
- 姓名:孙晓明
- 目前身份:
- 担任导师情况:
- 学位:
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学术头衔:
博士生导师, 教育部“新世纪优秀人才支持计划”入选者
- 职称:-
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学科领域:
地质学
- 研究兴趣:目前主要从事成矿流体地球化学、海底矿产纳米地球化学和环境地球化学的研究。
孙晓明教授,1963年9月生。1979.9-1988.2为南京大学地质系本科生、硕士生,博士生;1990年获中澳联合培养博士学位;1990.7~1992.10在华东有色地勘局研究所任矿床室主任,工程师;1992.11~1998.3为中山大学地学院地球科学系讲师、副教授、教授;1998.2~1998.8为Dept. of Geology, NMT, USA访问科学家;1996~2002兼任中山大学地学院副院长、院长; 目前为中山大学地球科学系教授、博士导师,兼任中国矿物岩石地球化学学会理事、广东省矿物岩石地球化学学会副理事长、国家重大基础研究(973)评审专家、《矿床地质》、《地球化学》和《Journal of Geosciences of China》、《安全与环境学报》等学术刊物编委、内生成矿作用国家重点实验室学术委员会委员、广东省科技奖评审委员会委员、 广东省石油学会常务理事、广州市建设科学技术委员会环境专业委员会专家、中山大学学术委员会委员等;近年来主持国家级和省部级科研项目18项,出版学术专著3本,发表论文70余篇,其中19篇为SCI、EI和ISPT收录。先后获江苏省第二届“中青年科技奖”、中国地质学会第五届“青年地质科技奖” 、国家教委科技进步二等奖、广东省首届“青年科技奖”; 1996年被选为中山大学“跨世纪优秀人才”和“学科带头人培养对象”,并入选广东省“千百十工程”;1997年入选国家教育部“优秀年轻教师资助计划”,2002年入选国家教育部”跨世纪优秀人才”培养计划。 目前主要从事成矿流体地球化学、海底矿产纳米地球化学和环境地球化学的研究,正主持多项国家自然科学基金和国家“973”项目。
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【期刊论文】藏南邦布大型造山型金矿成矿流体地球化学和成矿机制
孙晓明, 韦慧晓, 翟伟, 石贵勇, 梁业恒, 莫儒伟, 韩墨香, 张相国, 易建洲
,-0001,():
-1年11月30日
邦布金矿位于青藏高原雅鲁藏布江缝合带东段的南侧,矿体受大型脆—韧性剪切带的次级断裂控制,是目前西藏境内已发现的为数不多的大型原生金矿之一。系统的显微测温和激光拉曼测定显示邦布金矿矿石中存在三类流体包裹体:(Ⅰ)纯液相水溶液包裹体;(Ⅱ)含CO2盐水溶液包裹体,此类包裹体又分为两相(Ⅱa)和三相(Ⅱb)两个小类;(Ⅲ)纯气相碳氢化合物包裹体。邦布金矿床中流体包裹体显微测温结果如下:含CO2盐水溶液包裹体的盐度范围为2.20~9.45 wt%NaCleq,,峰值在6.0~7.0 wt%NaCleq,平均值为6.25 wt%NaCleq;均一温度的范围在166.7~335.8℃,峰值在210~250℃,平均值为235.4℃。相对应的密度范围在0.63~0.96 g/cm3,峰值为0.85~0.95 g/cm3,平均值为0.87 g/cm3。以含CO2盐水溶液包裹体为代表的邦布金矿床成矿流体具有富含CO2、低盐度、低密度、中低温度的特征,与造山型金矿成矿流体相似。同位素测定显示成矿流体的氢氧同位素组成分别为 , ,说明成矿流体主要为变质水,但有地幔流体的加入。综合成矿地质特征和成矿流体的证据,提出邦布金矿为喜马拉雅期陆陆碰撞造山型金矿。
流体包裹体, 氢氧同位素组成, 邦布金矿, 藏南; 碰撞造山型金矿,
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孙晓明, 周峰, 翟伟, 梁业恒, 韦慧晓, 莫儒伟, 张相国
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-1年11月30日
折木朗金矿位于青藏高原雅鲁藏布江缝合带东段的南侧,矿体受大型脆—韧性剪切带的次级断裂控制。系统的显微测温和激光拉曼测定显示折木朗金矿矿石中存在三类流体包裹体: NaCl-H2O溶液包裹体(类型Ⅰ);含CO2盐水溶液包裹体(类型Ⅱ),此类包裹体又分为两相(Ⅱa)和三相(Ⅱb)两个小类;Ⅲ纯气相包裹体。折木朗金矿床中流体包裹体显微测温显示该矿成矿流体的盐度范围为2.31~7.39% NaCleq,平均值为5.33%NaCleq,峰值为4.0~7.0%NaCleq;均一温度的范围为164.5~273.1℃,峰值为220~240℃,平均值为221.0℃。相对应的密度范围为0.82~0.93g/cm3,峰值为0.84~0.90g/cm3,平均值为0.88g/cm3。折木朗金矿床成矿流体具有富含CO2、低盐度、低密度、中低温度的特征,与造山型金矿成矿流体相似。此外,同位素测定显示成矿流体的氢氧碳同位素组成分别为 =-36.7~ -107.5(‰), = 4.1~5.5(‰),δ13C=-9.6~-11.5(‰),说明成矿流体主要为变质水,但有地幔流体的加入。综合成矿地质特征和成矿流体的证据,提出折木朗金矿为陆陆碰撞造山型金矿。
流体包裹体, 氢氧碳同位素组成, 折木朗金矿, 藏南, 造山型金矿,
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孙晓明
,-0001,():
-1年11月30日
We have identified abundant exsolutions in apatite aggregates from eclogitic drillhole samples of the Chinese Continental Scientific Drilling (CCSD) project. Electron microscope and laser Raman spectroscopy analyses show that the apatite is fluorapatite, whereas exsolutions that can be classified into four types: (A) platy to rhombic monazite exsolutions; (B) needle-like hematite exsolutions; (C) irregular magnetite and hematite intergrowths; and (D) needle-like strontian barite exsolutions. The widths and lengths of type A monazite exsolutions range from about 6–10μm (mostly 6μm) and about 50–75μm, respectively. Type B exsolutions are parallel with the C axis of apatite, with widths ranging from 0.5 to 2μm, with most around 1.5μm, and lengths that vary dramatically from 6 to 50μm. Type C exsolutions are also parallel with the C axis of apatite, with lengths of _30–150μm and widths of _10 to 50μm. Type D strontian barite exsolutions coexist mostly with type B hematite exsolutions, with widths of about 9 lm and lengths of about 60–70μm. Exsolutions of types B, C and D have never been reported in apatites before. Most of the exsolutions are parallel with the C axis of apatite, implying that they were probably exsolved at roughly the same time. Dating by the chemical Th–U-total Pb isochron method (CHIME) yields an U–Pb isochron age of 202±28Ma for monazite exsolutions, suggesting that these exsolutions were formed during recrystallization and retrograde metamorphism of the exhumed ultrahigh pressure (UHP) rocks. Quartz veins hosting apatite aggregates were probably formed slightly earlier than 202 Ma. Abundant hematite exsolutions, as well as coexistence of magnetite/hematite and barite/hematite in the apatite, suggest that the oxygen fugacity of apatite aggregates is well above the sulfide-sulfur oxide buffer (SSO). Given that quartz veins host these apatite aggregates, they were probably deposited from SiO2-rich hydrous fluids formed during retrogression of the subducted slab. Such SiO2-rich hydrous fluids may act as an oxidizing agent, a feasible explanation for the high oxygen fugacity in convergent margin systems.
Chinese Continental Scientific Drilling (, CCSD), ,, Eclogite,, Apatite aggregates,, Exsolutions
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【期刊论文】粤中长坑金银矿硫化物中包裹体的轻烃组成及矿床成因的探讨*
孙晓明, 孙晓明①, ②, DaVid I. NOrlllan③, 孙凯①, 陈炳辉①, 陈敬德①
自然科学进展,1999,10(9):1364~1367,-0001,():
-1年11月30日
高真空四极气相质谱系统分析表明长坑金银矿的硫化物矿物流体包裹体中存在9种轻烃有机气体,它们主要由C1-4饱和烷烃和C2-4不饱和烯烃和芳烃组成,但烷烃占绝对优势,而烯烃和芳烃含量很低;并且,这些有机气体主要来自中低温条件下水/岩反应所导致的沉积岩中有机质的热分解,成矿过程应基本未受到岩浆作用的影响。金矿和银矿硫化物样品中轻烃有机气体的组成说明两者的成矿过程可能相似。有机气体组成表明,该矿成矿时其大地构造背景为裂谷环境。
硫化物, 流体包裹体, 轻烃有机气体, 长坑金银矿
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【期刊论文】微细浸染型金矿激光微区40Ar/39Ar等时年龄测定: 以长坑大型金矿为例
孙晓明, 孙晓明①, ②, 陈文③, ④, 王敏①, 薛婷①, 孙凯①, 陈炳辉①
科学通报,2003,48(12):1355~1358,-0001,():
-1年11月30日
采用激光微区40Ar/39Ar定年技术,对粤中长坑微细浸染型金矿主成矿期热液蚀变黏土矿物进行了测定,得出该矿金的主成矿年龄为109.9±1.4~110.1±1.3Ma,较银的主成矿年龄早30~50Ma。金和银的成矿均与该区隐伏花岗岩体无关,而可能都是沉积盆地演化的产物。研究表明激光微区。40Ar/39Ar定年方法十分适用于微细浸染型金矿成矿时代的厘定。
伊利石, 激光微区熔样, 40Ar/, 39Ar等时年龄, 长坑微细浸染型金矿
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【期刊论文】金堆城超大型钼矿床水-岩δD-δ18O同位素交换体系理论模型及成矿流体来源*
孙晓明, 孙晓明), 任启江), 杨荣勇), 徐兆文), 刘孝)
地质地球化学,1998,26(2):6~11,-0001,():
-1年11月30日
基于水-岩δD一δ18O同位素交换体系理论模型的建立和计算,对金堆城超大型斑岩钼矿四个不同成矿期中成矿流体的演化和来源进行了研究,发现在成矿前期和早期,成矿流体为岩浆水与围岩在较低水/岩比值(0.1∠w/R>0.001)和中、高温(t=250-500℃)条件下反应后的残余流体,而主成矿期和成矿晚期的成矿流体为大气降水在相对较高水/岩比值(0.5>w/R∠O.1)和中、低温(t=150~310℃)条件下与围岩反应后的残留流体。大气降水在金堆城钼矿成矿过程中起了重要作用。在主成矿期水/岩比值达到最高。
水/, 岩反应δD一δ18O同位素交换模型, 成矿流体来源, 金堆城超大型钼矿
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孙晓明, SUN XIAOMING), QIJIANG), YANG RONGYONG), XU ZAOWEN), AND LIU XIAOSHAN)
CHINESE JOURNAL OF CEOCHEMISTRY Vol. 17 No.3,-0001,():
-1年11月30日
Based on the theoretical modelling of water-rock δD-δ18O isotopic exchange process, the evolution and sources of ore-forming fluid in four metallogenic epochs of the Jinduicheng superlarge-scale porphyry-type molybdenum deposit were investigated. It was revealed that in thepre-metallogenic and early-metallogenic epochs, the ore-forming fluid was a residual fluid de-rived from magmatic water-wall rock interaction at middle to high temperatures (T=250-500℃) and lower W/R ratios (0.1>=W/R>0.001), while in the metallogenic and post-metallogenic epochs, the ore-forming fluid was a residual fluid derived from meteoric water-wall rock interaction at middle to lower temperatures (T=150-310℃) and relatively high W/R ratios (0.5 >W/R≥0.1). The meteoric water played an important role in molybdenum min-eralization, and at the main metallogenic epoch the W/R ratio reached its maximum value.
water-rock interaction, δD-δ18O isotopic exchange model, source of ore-forming fluid, Jinduicheng superlarlee-scale Mo-deposit
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孙晓明, SUN Xiaoming, , David I. Norman, SUN Kai, CHEN Binghui and CHEN Jingde
SCIENCE IN CHINA Vol. 42 No.4 October 1999,-0001,():
-1年11月30日
Changkeng Au-Ag deposit is a newly-discovered new type precious metal deposit. N2-Ar-He systematics studies and 3He/4He and δD-δ18O composition analyses show that the ore-forming fluid of the deposit is composed mainly of formation water (sedimentary brine) but not of meteoric water, which was thought to be source of the ore-forming fluid by most previous researchers. The content of mantle-derived magmatic water in the ore-forming fluid is quite low, usually lower than 10%. According to the source of the ore-forming fluid, the Changkeng Au-Ag deposit should belong to sedimentary brine transformed deposits. From the Late Jurassic to the Early Cretaceous Period, with deposition and accumulation of thick sediments in Sanzhou Basin, the formation water in the sedimentary layers was expelled from the basin because of overburden pressure and increasing temperature. The expelled fluid moved laterally along sedimentary layers to the margin of the basin, and finally moved upward along a gently-dipping interlayer fault. Because of a decline in pressure and temperature, ore minerals were deposited m the fault.
ore-forming fluid,, N2-Ar-He systematies,, 3He/, 4He and δD-δ18 composition,, formation water (, sedimentary brine), ,, Changkeng Au-Ag deposit.,
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【期刊论文】利用N2-Ar.He示踪法研究粤东嵩溪大型银锑矿成矿流体*
孙晓明, 孙晓明①, ②, D. I. Norman③, 孙凯①, 陈敬德①, 陈炳辉①
自然科学进展,1992,9(12):1364~1367,-0001,():
-1年11月30日
嵩溪银锑矿是90年代初发现的一个大型新型独立银矿,其成因存在海底基性火山喷流和浅成中低温火山热液充填两种不同观点。前者认为成矿流体为海底热卤水,而后者则认为主要来自岩浆水,但有大气降水加入。较系统的N2-Ar-He组成和He同位素研究清楚地显示嵩溪成矿流体主要来源于建造水或称沉积热卤水,其中幔源岩浆水的比例很小,一般<5%。从成矿流体来源看,嵩溪银锑矿成因类型应属沉积热卤水改造型。
成矿流体N2-Ar-He示踪法, 沉积热卤水, 独立银锑矿
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孙晓明, SUN Xiaoming, , WANG Min, XUE Ting, MA Mingyang and LI Yinhe
ACTA GEOLOGICA SINICA Vol. 78 No.2 April. 2004,-0001,():
-1年11月30日
He-Ar isotopic compositions of fluid inclusions trapped in pyrites from some representative PGEpolymetallic deposits in Lower Cambrian black rock series in South China were analyzed by using an inert gas isotopic mass spectrometer. The results show that the ore-forming fluids possess a low 3He/4He ratio, varying from 0.43
He-Ar isotopic systematics,, pyrite,, fluid inclusions,, PGE-polymetallic deposit,, basinal hot brine
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