两种用于确定磁异常座标原点的公式

利用剖面上磁异常点的座标关系,可以导出用以确定斜磁化规则体磁异常座标原点的公式.下面介绍两种公式. 公式推导由剖面上四个磁异常点的座标x_1,x_2,x_1',     

关于重磁异常最优化反演方法几个问题的讨论

对重磁异常最优化反演方法提出几点认识，也即提出几点有益的建议。     

磁法测量在甲基卡地区找矿中的应用

通过对四川省康定县甲基卡地区内开展的磁法测量,系统分析该区域磁法测量数据特征;依据甲基卡地区地层和岩浆岩等地质特征,圈定磁异常点带,并进行磁异常点带解释,为开展系统矿产检查,为寻找新的找矿靶区和矿产地提供依据。     

用分解曲线法解二度水平圆柱体及球体磁异常反问题

本文利用二度水平圆柱体，球体主剖面上两个磁异常零值点坐标与它们之间距离间的关系，导出求取磁性体中心在地表的投影点即坐标原点位置的公式，将分解曲线法用于求这两种磁性体的中心埋深及半径，从而完善了规则磁性体磁异常反演中这一简便有效的方法。     

利用区域物探重磁资料圈定黔东金刚石母岩钾镁煌斑岩的尝试

本文试图据镇远马坪一带分布的钾镁煌斑岩露头,及与之对应的1∶20万区域重磁异常的特征响应值（剩余重力异常值（1～4）×10-5m/s2、航磁异常值（2～12）nT）为线索,以辉石重砂异常点分布、金刚石砂矿出土点分布、金刚石指示矿物铬尖晶石发现点分布、有限物性资料及局部重磁异常分布特征为基础,对台江-剑河-锦屏-黎平一带...     

磁法测量在甲基卡地区找矿中的应用

通过对四川省康定县甲基卡地区内开展的磁法测量,系统分析该区域磁法测量数据特征;依据甲基卡地区地层和岩浆岩等地质特征,圈定磁异常点带,并进行磁异常点带解释,为开展系统矿产检查,为寻找新的找矿靶区和矿产地提供依据。     

航磁资料在卫宁北山寻找多金属矿中的应用

为深入研究卫宁北山地区的航磁资料,提取弱磁异常信息,对该区前期的航磁资料进行延拓、化极等处理,对磁异常做出了新的解释,分析了该地区多金属矿床(点)、矿化带与磁异常的关系,结合重力异常资料、电磁测深结果,做出磁性基底受控于近东西向构造,隐伏中酸性岩体是引起弱磁异常的磁源体,也可能就是多金属矿的物源体的推断,并预测了深部成矿远景区。     

黑龙江大兴安岭地区航磁异常特征及找矿效果

利用大兴安岭地区1：5万高精度航磁资料,结合区域地质背景分析了该区航磁异常特征,依据地物化资料、已知矿（床）点的分布及成矿规律筛选出了一批航磁异常.在最新的高精度航磁图上,已知铁矿异常特征明显,经对比研究及综合查证发现了1处磁铁矿点及多处有色金属、贵金属矿点,在此基础上总结查证经验,指出了今后采用航磁数据在区内的找矿方向.     

黑龙江大兴安岭地区航磁异常特征及找矿效果

利用大兴安岭地区1∶5万高精度航磁资料,结合区域地质背景分析了该区航磁异常特征,依据地物化资料、已知矿(床)点的分布及成矿规律筛选出了一批航磁异常。在最新的高精度航磁图上,已知铁矿异常特征明显,经对比研究及综合查证发现了1处磁铁矿点及多处有色金属、贵金属矿点,在此基础上总结了查证经验,指明了今后采用航磁数据在区内的找矿方向。     

潞西地区航磁异常特征及找矿新思路

潞西地区航磁有三个异常带：第一异常带为同源重磁异常,反映高密度磁源体,由基性～超基性岩引起;第二异常带区域不同源重磁异常,反映低密度磁源体为混合片麻岩、混合岩等低密度地层,局部可能反映团坡厂和轩岗乡与黄铁矿相类似的矿床（点）;第三异常带,重磁异常也不同源,反映寒武系一第四系的新地层,局部与花岗岩接触带及与断裂破碎有关的矽卡岩型铅锌多金属矿。依据区内航磁异常及地球物理特征,提出在潞西地区的找矿思路和方向。     

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