西天山菁布拉克岩带基性－超基性岩的Nd、Sr同位素地球化学

新疆西天山菁布拉克岩带基性－超基性岩的全岩εＮｄ（ｔ）约为－５．１－＋６．４，８７Ｓｒ／８６Ｓｒ（ｔ）约为０．７０３７－０．７０９４。幔源岩浆同化围岩和结晶分异联合作用（即ＡＦＣ过程）可以解释这些岩石的Ｎｄ、Ｓｒ同位素组成。     

新疆阿拉套山花岗岩类的特征及成因研究

从岩石化学、ＲＥＥ、Ｓｒ，Ｎｄ，Ｏ，Ｐｂ同位素等角度讨论了新疆阿拉套山花岗岩类地球化学特征。结果表明本区存在两个系列的花岗岩，东部以Ⅰ型为主，西部Ｓ型花岗岩占主导地位。同时，本区岩石的Ｓｒ，Ｎｄ，Ｏ同位素组成可以用ＡＦＣ模式加以解释，即它们是由幔源岩经过同化地壳围岩同时结晶分异形成。当然也不排除幔源组分较多的优地槽不成熟沉积物发生重熔形成的可能。     

西天山琼阿乌孜超基性岩体的稀土元素和Sr,Nd同位素研究

对西天山琼阿乌孜超基性岩体和围岩片麻岩作了Ｓｍ、Ｎｄ、Ｒｂ、Ｓｒ同位素和稀土元素的研究，获得岩体的形成年龄为３１４±１９Ｍａ，∑ＲＥＥ约为４．０～７．６μｇ／ｇ。其主体岩石是由来源于未亏损地幔较高程度熔融而产生的岩浆在结晶分异作用中形成。其岩体的边缘［εＮｄ＝－５，（８７Ｓｒ／８６Ｓｒ）＝０．７０５５，∑ＲＥＥ＝１１１．５６μｇ／ｇ］同化了围岩［εＮｄ＝－１６．７，（８７Ｓｒ／８６Ｓｒ）ｉ＝０．７５３７，∑ＲＥＥ＝１９６μｇ／ｇ］，并同时发生结晶作用，经历了ＡＦＣ过程，形成了特有的琼阿鸟孜超基性岩侵入体。     

铜陵地区高钾钙碱系列侵入岩

铜陵地区侵入岩在化学性质上不属于一般的钙碱系列岩石。它们可能是幔源碱性玄武岩浆同化古老麻粒岩相下地壳为主的酸性组分，同时发生结晶分离（ＡＦＣ的产物。铜陵地区侵入岩的特点是：以石英二长闪长岩为主，高钾富碱，富Ｓｒ，δＥｕ＝０．９±。εＮｄ和ＩＳｒ较低，Ｐｂ同位素比值中等，但均有较好的线性关系。在εＮｄ－ＩＳｒ图和＾２０７Ｐｂ／＾２０４Ｐｂ－＾２０６Ｐｂ／＾２０４Ｐｂ图上，样品投影点的特点是均作陡倾斜     

中国东南中生代大陆边缘构造—岩浆带的同位素地球化学

根据中生代火山岩和侵入岩的岩石类型与组合及其岩石化学特征等，将中国东南中生代大陆边缘分成陆缘火山（岩浆）弧（Ｃｖａ）、陆缘弧后（间）火山盆地带（Ａｂｖ）和裂陷火山（岩浆）带（Ｒｖ），并深入研究了它们的Ｓｒ、Ｏ、Ｐｂ和Ｓｍ、Ｎｄ同位素组成特征。Ｃｖａ具较低的ＩＳｒ和δ１８Ｏ值及变化较大的Ｐｂ同位素组成与较高的εＮｄ值；Ａｂｖ具较高的ＩＳｒ和δ１８Ｏ值及较稳定的Ｐｂ同位素组成与较低的εＮｄ值；Ｒｖ则具较低（较稳定）的ＩＳｒ值和Ｐｂ同位素组成及变化较大的δ１８Ｏ值与εＮｄ值。由此推断，Ｃｖａ和Ａｂｖ的岩浆均为陆缘亏损地幔与上地壳成分混合形成（前者地幔成分居多，后者以地壳成分为主），Ｒｖ的岩浆则具陆内交代－亏损地幔与较多的下地壳物质混合源的成因特征。     

安徽沿江地区岩浆成矿带

安徽沿江地区可分为三个岩浆成矿带：内带（主带） 、北（ 外） 带和南（ 外） 带。内带沿长江断裂带分布，与地幔隆起带一致，幔源高钾碱性玄武岩浆通过不同程度的ＡＦＣ混合机制和结晶分异机制，形成了不同的岩石组合和矿床，基性岩到酸性岩均有分布，其共同点是高钾富碱，侵入岩以高钾钙碱性岩系为主，火山岩以橄榄安粗岩系为主，广义矽卡岩型Ｃｕ、Ｆｅ、Ｓ、Ａｕ 及火山岩型Ｆｅ、Ｓ矿床是主要的矿床类型；南（外） 带以花岗闪长斑岩为主，高硅低碱，属钙碱性岩系，是上地壳下部易熔组分重熔的产物，成矿元素也由主带的Ｃｕ、Ｆｅ、Ｓ、Ａｕ 转向Ｐｂ、Ｚｎ（Ａｇ） 、Ｃｕ、Ｍｏ、Ｗ 等，是斑岩型Ｍｏ、Ｃｕ 矿床的远景带；北（外） 带比较复杂，主体部分属钙碱性岩系，花岗岩与花岗闪长岩侵入体是下地壳重熔的产物，部分花岗闪长斑岩形成广义矽卡岩型Ｃｕ、Ａｕ 矿床，另一部分以幔源物质为主的闪长玢岩，形成斑岩型Ｃｕ 矿。不同的岩浆成矿带受不同的基底控制。Ｎｄ 、Ｓｒ、Ｐｂ 同位素研究表明，主带和北带存在太古宙麻粒岩相变质基底，南带岩浆岩则源于元古宙角闪岩相到绿片岩相变质基底。地幔隆起与幔源物质参与成矿作用，以及由地幔隆起带来的高热流是成矿的最有利条件。建议深入研究幔脊     

冀北水泉沟杂岩体的同位素地球化学特征及其成因意义

水泉沟杂岩体的δ１８Ｏ‰值除个别样品高于１０‰或低于５．５‰外，大多数在５．５‰～１０．０‰之间。其三组铅同位素比值明显高于本区太古界桑干群变质岩，并位于上地幔和下地壳铅增长线之间。利用ＲｂＳｒ等时线求得锶同位素初始值为０．７０６１８±０．０００１４，利用Ｆａｕｒｅ［１］提出的二元混合锶模型求得岩浆源区由约６４％的上地幔组分和约３６％的地壳组分组成。通过对其Ｏ、Ｐｂ和Ｓｒ同位素综合分析后得出，岩浆起源于上地幔的顶部和下地壳底部的过渡带，同时岩浆在高位岩浆房中和上升过程中也发生了不同程度的同化混染作用     

北秦岭灰池子花岗岩基成岩物质来源探讨

本文主要通过Ｎｄ，Ｓｒ和Ｏ同位素示踪研究，分析了灰池子花岗岩基的成岩物质来源，初步查明该岩体的岩浆源区由６９％的地幔物质和３１％的陆壳物质混合而成，属壳幔型花岗岩。     

陕南铁船山岩体的地球化学特征、成因及其形成的构造环境

扬子克拉通北缘的铁船山岩体形成于新元古代，其岩石类型为霓石－钠铁门石花岗岩，岩石富碱质、Ｓｔ、Ｆｅ、ＲＥＥ和高场强元素，而贫Ａｌ、Ｃａ、Ｍｇ、Ｓｒ、Ｂａ、Ｃｏ、Ｎｉ等组分，δＥｕ＝０．２０，Ａ／ＫＮＣ＝０．８５，Ｋ２Ｏ＋Ｎａ２Ｏ／Ａｌ２Ｏ３＝１．０９，Ａ·Ｒ＝９．２８，岩石属典型的Ａ型花岗岩，Ｎｄ、Ｓｒ和Ｏ同位素示踪反映其成岩物质来自于壳幔混合源区。根据区域地质背景的综合分析，岩体形成于活动陆缘的张裂构造环境，属活动板块边缘拉张型花岗岩。     

宁芜地区中生代岩浆岩的成因——岩石学与Nd,Sr,Pb同位素证据

宁芜中生代火山盆地产出火山岩与侵入岩，火山岩以玄武粗安岩，粗安岩和粗面岩为主，安山岩和响岩少量，火山岩以高钾富碱为特征，已确定为橄榄安粗岩系。侵入岩以辉长闪长玢岩－一辉长闪长岩为主，以高钠低硅为特征，并有辉长岩和花岗岩产生，据地质学和Ｎｄ，Ｓｒ，Ｐｂ同位素资料，侵入岩与火山岩属同一个岩浆系列，是碱性玄武岩浆在下地壳经过轻度ＡＦＣ混合后，侵入上地壳，在轻度混染的情况下，经过以结晶分离为主的岩浆分异形     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

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.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

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