五大连池火山区气体地球化学特征

根据泉（池）水中气体的组分和同位素组成,讨论了五大连池火山区气体的来源和运移。１９９７年８月从五大连池火山区泉中采用了９个气、水样品,同年９月测定了游离气和水溶气的气体组分、Ｈｅ同位素幽会和ＣＯ２的δ＾１３Ｃ值。气体以ＣＯ２为主,多数样品的ＣＯ２体积分类大于８０％。Ｈｅ和ＣＨ４的体积分数变化范围大,分别为０．７×１０＾－６－３８０×１０＾－６和４．０×１０＾－６－１８０×１０＾－６。＾３Ｈｅ／Ｈｅ     

天然气中氦同位素分布及构造环境

通过采集天然气样３３４个，测量了它们的氦同位素组成。３Ｈｅ／４Ｈｅ值分布在０５６×１０－８～７２１×１０－６范围。３Ｈｅ／４Ｈｅ值分布与天然气储层时代无明显的相关性，而在空间展布上有较明显的规律。东部含油气区３Ｈｅ／４Ｈｅ值主要分布于１０－７～１０－６范围，西部含油气区在１０－７～１０－８的范围，中部地区分布在０５６×１０－９～０５６×１０－８范围，３Ｈｅ／４Ｈｅ值的分布与我国构造环境大的格局有很好的相关性。３Ｈｅ／４Ｈｅ的高值区构造环境活动性强，低值区具有最稳定的大地构造属性，西部地区３Ｈｅ／４Ｈｅ值介于东部和中部，具有次稳定的构造环境。     

中国东部幔源气体同位素地球化学

中国东部地幔岩包体及其单矿物中发育有大量的流体包裹体，采用阶段加热真空热爆的 方法脱出幔源包裹体中的气体，测试了气体的碳、氧、氦、氮等同位素组成。ＣＯ２的σ１３℃普遍较低， 主峰值为（－１８～－２２）×１０－3 ，多数样品在高温下的 σ１３℃普遍小于低温下的对应值。氧同位素变 化也很大，从－３．４×１０－３至２５．５×１０－３（ＳＭＯＷ），并呈现多峰的特征。σ１８Ｏ与σ１Ｃ３具有很好的相 关性，可能受控于同种分馏机制。Ｃ、Ｏ同位素组成特征表明，中国东部大陆地幔具有很大的化学不 均一性，可能是由地幔碳的多样性、源区的不均一性或地幔交代作用所致。氧同位素的变化可能是 结晶作用、去气作用或地壳物质混染所至。４Ｈｅ含量变化范围为（０．２４～２５．００）×１０－８，３Ｈｅ／４Ｈｅ变 化范围为（０．４６～１２．８０）×１０－６，４０Ａｒ含量从０．９７×１０－６到３４．１８×１０－６，４０Ａｒ／３６Ａｒ变化范围为 ２５０．５８～１２０２。３Ｈｅ／４Ｈｅ的变化反映了亏损地幔和富集地幔的存在。不同地区４０Ａｒ／３６Ａｒ的巨大差 异显示了地幔脱气程度的不同，也说明在地幔演化中Ａｒ、Ｈｅ同位素地球化学行为的差异。     

香港中生代火成岩U—Pb法年龄测定

香港中生代侵入岩和火山岩２２个锆石和独居石新的Ｕ－Ｐｂ年龄,揭示了中侏罗世至早白垩世火山－深成作用分为４期,（１６４．６±０．２）×１０＾６～（１５９．３±０．３）×１０＾６ａ,（１４６．６±０．２）×１０＾６～（１４６．２±０．２）×１０＾６ａ,（１４３．７±０．３）×１０＾６～（１４２．５±０．３）×１０＾６ａ,（１４０．９±０．２）×１０＾６～（１４０．４±０．２）×１０＾６ａ。从最早知道的     

华北地台钼（铜）矿床成矿年代学研究——辉钼矿铼-锇年龄及其地质意义

华北地台北缘的工产辽和南缘的东秦岭两个钼矿带闻名遐迩。本文用同位素稀释－等离子体质谱法，直接测定了燕辽钼矿带中兰家沟钼矿床的Ｒｅ－Ｏｓ等时线年龄为（１８６．５±０．７）×１０＾６ａ，杨家杖和肖家营子钼矿床的Ｒｅ－Ｏｓ模式年龄为（１８７±２）×１０＾６ｄ－（ｄ１９１±６）×ｄ１０＾６ａ和（１７７±５）×１０＾６ａ，小寺沟和寿王坟铜矿床的Ｒｅ－Ｏｓ模式为ＤＤ（１３４±３）×１０＾４ａ和（１４８±４）×     

微型核反应堆中子活化分析测定地质样品中的卤素元素

研究了微堆中子活化分析测定地质样品中卤素元素的测量条件和测量中的影响因素，对超热中子活化分析测定Ｉ和Ｂｒ进行了实验研究，Ｆ，Ｃｌ，Ｂｒ，Ｉ的检出限分别为１０＾－３、７４×１０＾－６，１．７×１０＾－６，７．８×１０＾－６。ＲＳＤ〈１５％。     

流体—岩石反应体系中的硼同位素地球化学

Ｂ在岩浆作用中对于主要造岩矿物的不相容性和水溶液中的较大溶解度使其在地壳（１０×１０＾－６）和海洋（４．６×１０＾－６）中大量富集。在自然界中Ｂ的同位素组成变化很大（δ＾１１Ｂ＝－３２‰－＋５８‰），但在不同类型地质体中却有较特定的分布范围。造成自然界的Ｂ的同位素分馏的主要原因在于流体－固体反应体系的ｐＨ条件和水／岩比值变化。Ｂ的这些特殊地位化学性质在不同地质地球化学作用示踪，特别是与流体有关的地     

铜矿峪铜矿床地球化学的研究

详细地研究了铜矿峪矿床地球化学特征，得出铜矿床形成的ｐｂ－ｐｂ年龄为２１亿年；矿床形成温度为３５０℃，压力为４×１０￣７ｐａ～１×１０￣８ｐａ；Ｌｏｇｆｏ＿２：为－３１～－３１．８８，ｌｏｇｆｓ＿２为－５～－８；ｐＨ值为３．６～６．４；硫化物的δ￣３４Ｓ值为－４．５‰～０．２‰，δ￣３４Ｓ为＋１０‰；方解石的δ￣１３Ｃ为－４．８９‰～１．１‰，δ￣１３Ｃ为一４．２８‰，成矿流体主要为岩浆水，属于斑岩型铜矿床。     

白云鄂博矿床独居石氧同位素组成特征及其意义

独居石和氟碳铈矿是超大型稀土矿床－白云鄂博矿床中最主要的稀土矿物。对独居石的氧同位素研究工作国内外开展得很少，本研究对独居石氧同位素制样方法进行了讨论。在计算的独居石－水氧同位素分馏方程：１０＾３ｌｎα＝－０．０９１－４．２２４×（１０＾３／Ｔ）＋３．８９６（１０＾６／Ｔ＾２）基础上，分析了矿床白云石型矿石和萤石型矿石中独居石的氧同位素组成。独居石δ＾１８Ｏ值的变化范围为３．５‰－１１．４‰，其中     

敦德冰芯过去800a来的甲烷记录

郭德冰芯上部９５ｍ的１２个样品记录了近８００ａ来冰内气泡包裹气体中甲烷的浓度变化,结果表明,最近２００ａ来该冰芯记录的甲烷浓度急剧上升,与南极及格陵兰的甲烷记录反映的趋势相一致,但与两极同时代样品相比,其浓度总体上要高出０．５×１０＾－６～０．６×１０＾－６ｍｏｌ／ｍｏｌ在这之前,３者基本保持一致,在０．７×１０＾－６～０．８×１０＾－６ｍｏｌ／ｍｏｌ之间波动。     

Définition d'une limite multicritère ; stratigraphie du passage Campanien–Maastrichtien du site géologique de Tercis (Landes,SW France)Definition of a multi-criteria boundary; stratigraphy of the Campanian–Maastrichtian interval of the geological site at Tercis (Landes,SW France)

Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414.     

Late Wuchiapingian (Late Dzhulfian,early Late Permian) limestone olistolites within the Tertiary flysch of Glypia Unit (Mount Parnon,central–eastern Peloponnesus,Greece)

Some olistolites reworked in a Tertiary flysch of Mount Parnon (Peloponnesus, Greece) exhibit a Late Permian assemblage, dominated by Paradunbarula (Shindella) shindensis, Hemigordiopsis cf. luquensis and Colaniella aff. minima. This association corresponds to the Late Wuchiapingian (=Late Dzhulfian), a substage whose algae and foraminifera are generally little known. Contemporaneous limestones crop out in the middle part of the Episkopi Formation in Hydra, but they are rather commonly reworked in Mesozoic and Cainozoic sequences. The palaeobiogeographical affinities shared by the foraminiferal markers of Greece, southeastern Pamir, and southern China, are very strong (up to the specific level), and are congruent with the Pangea B reconstructions. To cite this article: E. Skourtsos et al., C. R. Geoscience 334 (2002) 925–931.     

PALEONTOLOGY

正20141596 Liu Yunhuan(School of Earth Sciences and Resources,Chang’an University,Xi’an 710054,China);Shao Tiequan Early Cambrian Quadrapyrgites Fossils of Xixiang Boita in Southern Shaanxi Province(Journal of Earth Sciences and Environment,ISSN1672-6561,CN61-1423/P,35(3),2013,p.39-43,3 illus.,20 refs.)     

GEOCHEMICAL EXPLORATION

正20141719 Chen Zhijun(State Key Laboratory of Geological Processes and Mineral Resources,China University of Geosciences,Wuhan 430074,China);Chen Jianguo Automated Batch Mapping Solution for Serial Maps:A Case Study of Exploration Geochemistry Maps(Journal of Geology,ISSN1674-3636,CN32-1796/P,37(3),2013,p.456-464,2 illus.,2 tables,10 refs.)     

MICROPALAEONTOLOGY

正20140962 Chen Fenning(Xi’an Institute of Geology and Mineral Resources,Xi’an710054,China);Chen Ruiming Late Miocene-Early Pleistocene Ostracoda Fauna of Gyirong Basin,Southern Tibet(Acta Geologica Sinica,ISSN0001-5717,CN11-1951/P,87(6),2013,p.872-886,6illus.,56refs.)     

PETROLOGY

正1.IGNEOUS PETROLOGY20142008Cai Jinhui(Wuhan Center,China Geological Survey,Wuhan 430205,China);Liu Wei Zircon U-Pb Geochronology and Mineralization Significance of Granodiorites from Fuzichong Pb-Zn Deposit,Guangxi,South China(Geology and Mineral Resources of South China,ISSN1007-3701,CN42-1417/P,29(4),2013,p.271-281,7illus.,     

ENVIRONMENTAL GEOLOGY

正20141205Cheng Weiming(State Key Laboratory of Resources and Environmental Information System,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China);Xia Yao Regional Hazard Assessment of Disaster Environment for Debris Flows:Taking Jundu Mountain,Beijing as an     

PROSPECTING EXPLORATION

正20141266Fan Chaoyan(Guangdong Provincial Key Laboratory of Mineral Resources and Geological Processes,Guangzhou 510275,China);Wang Zhenghai On Error Analysis and Correction Method of Measured Strata Section with Wire Projection Method(Journal of     

OCEANOGRAPHY & MARINE GEOLOGY

正20140582 Fang Xisheng(Key Lab.of Marine Sedimentology and Environmental Geology,First Institute of Oceanography,State Oceanic Administration,Qingdao 266061,China);Shi Xuefa Mineralogy of Surface Sediment in the Eastern Area off the Ryukyu Islands and Its Geological Significance(Marine Geology Quaternary Geology,ISSN0256-1492,CN37     

ENVIRONMENTAL GEOLOGY

正20141810 Bian Yumei(Geological Environmental Monitoring Center of Liaoning Province,Shenyang 110032,China);Zhang Jing Zoning Haicheng,Liaoning Province,by GeoHazard Risk and Geo-Hazard Assessment(Journal of Geological Hazards and Environment Preservation,ISSN1006-4362,CN51-1467/P,24(3),2013,p.5-9,2 illus.,tables,refs.)