SiO2—Al2O3—Na2O（K2O）系列淬火熔体的高温高压合成及其LRM研究

本文采用合成溶胶凝胶中间体的技术方法,降低了硅酸盐熔体的熔化温度,并在１７５０～１８５０℃和２．０～４．０ＧＰａ条件下合面出９个ＳｉＯ２－Ａｌ２Ｏ３－Ｎａ２Ｏ（Ｋ２Ｏ）系列淬火硅权盐熔体,淬火熔体中Ｎａ（Ｋ）／Ａ１≤１属过铝质硅酸盐熔体,其激光拉曼微探针（ＬＲＭ）研究表明,随压力增大,Ｔ－Ｏｎｂ在高频区（９００～１２００ｃｍ＾－１）的对称和反对称伸缩振动频率明显减小,过铝质熔体中存在六配位铝,且随     

长英质岩浆中液态不混溶与成矿作用关系的实验研究

本文的实验研究表明：１２５０℃（１０５Ｐａ）条件下呈均一状态的花岗岩－ＫＢＦ４－Ｎａ２ＭｏＯ４体系，在１０００℃条件下发生液态不混溶形成三种熔体：相对偏酸性的液滴、相对偏基性的熔体和成矿熔体。成矿熔体中富含ＣａＯ、ＭｇＯ和ＭｏＯ２组分。红外光谱研究表明：硅酸盐熔体结构以［ＳｉＯ４］基团为主，而成矿熔体结构中存在Ｃａ—Ｆ、Ｃａ—Ｏ—Ｍｏ、Ｈ—Ｏ—Ｈ以及Ｘ─ＯＨ（Ｘ＝阳离子）基团，说明Ｈ２Ｏ和Ｆ富集在成矿熔体中。液态不混溶作用产生的三种不混溶熔体的结构差异明显，主要表现在结构单元中桥氧数目的变化，相对偏酸性的Ａ类小球体的结构单元中桥氧数最高，基底玻璃熔体中桥氧数则相对较少，而成矿熔体中不存在桥氧。本实验研究结果表明长英质岩浆中的液态不混溶可直接导致成矿熔体的形成。这意味着长英质岩浆中的液态不混溶可直接导致斑岩矿床的形成。     

贺兰山北段孔兹岩系脱水熔融实难Ⅱ：岩石结构对变质反应的制约

贺兰山北段孔兹岩系中最有代表性的两类岩石,变粒岩及富铝片麻岩天然块装样品的脱水熔融实验研究表明,在不同的温度压力条件,两类岩石产生明显不同的变质絷２,变粒岩类在所有的实验条件下均产生Ｂｔ＋Ｐｌ＋Ｑｚ→Ｈｙ＋Ｋｆ＝Ｍ（熔体）的反应,而富铝片麻岩在不同压力下出现不同的变质反应：０．４ＧＰａ条件发生：Ｂｔ＋Ｐｌ＋Ｑｚ→Ｈｙ＋Ｋｆ＋Ｍ;０．６ＧＰａ条件下发生;Ｂｔ＋Ｑｚ→Ｓｉｌ＋Ｋｆ＋Ｍ;０．８ＧＰａ条件     

高温高压下水的剪切粘滞度的平衡分子动力学计算

本项工作用ＴＩＰ４Ｐ模型对水分子进行了平衡分子动力学模拟。根据Ｇｒｅｅｎ－Ｋｕｂｏ理论,计算了温度从６５２Ｋ到８１４Ｋ,密度从０．５３６０ｇ／ｃｍ３到０．８６３８ｇ／ｃｍ３六个不同温度和密度水的剪切粘滞度,并和实验值进行了对比。在所计算的温度和密度范围,平衡分子动力学计算结果与实验值的平均绝对值差别为１５％,好于使用非平衡分子动力学方法获得的粘滞度值。平衡分子动力学的方法将是获得地学中高温高压下流体输运性质的重要途径。     

秦岭造山带若干岩石高温高压脱水熔融的特征及其意义

对秦岭造山带和邻区块状岩石样品进行了高温（1 100~1 300 ℃）和高压（1.2~1.8 GPa）脱水熔融实验。通过对实验产物综合分析发现许多样品中出现了熔融玻璃和雏晶。玻璃代表的熔体成分为基性和中性,部分接近于超基性范围,熔体与原来岩石全岩成分比较,更偏基性。熔体出现的空间和成分都显示了局部熔融体系的特征,即含水矿物（角闪石或黑云母）和浅色矿物（石英或斜长石）控制了熔融的发生并且决定了熔体的成分。脱水熔融产生了比原岩更偏基性的熔体,这意味着熔融后残留部分将愈偏酸性。如果这种机制存在于大陆中-下地壳,将对探讨大陆地壳的结构和物质组成,解释某些地区的长英质中下地壳的成因等具有重要的意义。     

岩浆中主要挥发份含量：熔融包裹体和淬火玻璃证据

挥发份在成矿熔体和流体的形成与演化过程中扮演着相当重要的角色。直接分析火成岩矿物中的熔融包裹体是确定岩浆结晶前挥发份含量的最理想方法。本文在现有熔融包裹体（和海底火山淬火玻璃）中挥发份含量数据的基础上,估算了主要挥发份（Ｈ２Ｏ、ＣＯ２、Ｃｌ、Ｆ、Ｓ等）在基性、中性和酸性等各类岩浆中的平均含量。     

广东主要断裂带和岩体的地球化学判别

按从已知推断未知的方法,利用断裂带的特征元素分３组（Ｎａ、Ｃａ、Ｍｇ、Ｂａ及Ｃｄ、Ｓｂ、Ａｓ、Ｐｂ和Ｚｒ、Ｓｎ、Ｂｉ、Ｆ等）等元素异常轴向线图,显示广东存在以珠江口为中心的扇弧断裂带和一系列基本垂直于扇弧断裂切线、大致等距分布并向珠江口收敛的主干线裂带,它们往往是控矿断裂。利用酸性岩体区的特征元素组合（Ｕ、Ｔｈ、Ｋ及Ｂｅ、Ｎｂ、Ｙ）和基性（或中基性）岩体区的特征元素组合（Ｎｉ、Ｃｏ、Ｖ、Ｔｉ、Ｐ或     

长江中下游中性－中酸性岩浆岩的母岩浆来源及铜的成矿作用──实验研究

针对长江中下游形成中性和中酸性岩浆岩的岩浆成因和Ｆｅ、Ｃｕ成矿作用问题，完成了一系列壳幔物质混合物、下地壳物质混合物及中性－中酸性岩浆岩在１０００－２０００ＭＰａ和９００－１５５０℃的水不饱和条件下熔融实验研究。实验结果表明，本地区中性和中酸性岩浆岩可能主要由适当比例的壳幔物质混合物熔化而得的岩浆结晶而成。硅酸盐玻璃的电子探针分析数据没有显示出Ｋ与Ｃｕ和Ｆｅ与Ｎａ的相关关系。在含硫体系中，铜在中性－中酸性硅酸盐熔体中的溶解度介于０．０２％－０．２３％之间，但多数铜分析值在０．１％以上（大致相当于初始物中１５％的铜溶解在硅酸盐熔体中）。余下的部分铜则以Ｃｕ、Ｆｅ、Ｓ组成的小球粒形式不均匀地散布在硅酸盐熔体中。实验结果还表明，中性－中酸性硅酸盐熔体的不混溶性普遍存在。     

栾家河花岗岩体中的矿物包裹体研究

根据熔融包裹体的均一温度和均一过程的时间,利用熔融包裹体的扩散率公式（ＤＨ＝ｒ２／４ｔ）、Ｅｙｒｉｎｇ方程（ＤＮ＝ＫＢ·Ｔ／η·λ）以及不同含水量花岗质熔体的ＬｎＤＨ－１／Ｔ实验图解,计算了胶东金矿区内与金矿形成关系密切的栾家河岩体中包裹体熔体的粘度和含水量。结果表明,熔融包裹体均一温度为９７０℃,粘度为３．８×１０６Ｐａ·ｓ,含水量为２．５％;流体熔融包裹体的均一温度为８５５℃,粘度为６１７．７Ｐａ·ｓ,含水量为５．８％,反映出花岗岩浆在结晶过程中含水量不断增高,粘度不断降低,到结晶作用晚期,流体相接近饱和状态。     

水在岩浆熔体中的溶解机理—水与硅酸盐熔体反应

本文将有关水－熔体反应研究领域内的最新果归纳为以下几个方面：（１）硅酸盐熔体中水至少以三种方式存在：分子水，羟基和质子，它们的相对丰度是熔体组成，溶解水含量，温度，压力等多种因素的函数；（２）水的溶解使熔体粘度降低，但这并不一定要求Ｓｉ－Ｏ－Ｓｉ键的破坏，质子对Ｎａ＾＋，Ｋ＾＋的置换也产生同样效果；（３）相对于温度和压力而言，熔体的组成对水溶解度的影响程度更高，水的溶解度随富Ｎａ和Ｌｉ组分含量的增     

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