简要介绍R2V的功能及其在数字化图件中的应用

许多物化探及地质成果资料以纸质图件保存,在资料的再利用时需对其进行数字化.这里简要介绍一种数字化功能强大的矢量化软件-R2V的功能,针对物化探图件的特点,探讨了R2V数字化的流程.     

兴蒙造山带橄榄岩捕掳体中石榴石次变边对地幔组成转变的启示

地幔橄榄岩捕虏体中石榴石次变边的形成过程对理解地幔的构造演化和转变具有非常重要的意义。兴蒙造山带锡林浩特地区新生代玄武岩携带的石榴石橄榄岩捕虏体中的石榴石普遍发育冠冕状次变边结构。本文通过对石榴石及其次变边进行详细的岩相学和电子探针分析,探讨石榴石次变边的成因及其揭示的岩石圈地幔经历的深部过程。根据次变边矿物组成的不同,将其分为原始的次变边(R1和R2)和交代的次变边(MR1和MR2)。原始的次变边中,新鲜的石榴石由内向外依次被放射状且矿物颗粒较细的R1和粒状且矿物颗粒较粗的R2包围,且R1通常比R2宽。R1主要组成矿物为Opx+Sp+Melt1/Pl±Cpx, R2主要组成矿物为Opx+Sp+Cpx。与R2及橄榄岩捕虏体相比,R1的斜方辉石和单斜辉石具有较高的Al₂O₃含量和较低Mg^#值及SiO₂含量。与橄榄岩捕虏体相比,R1和R2中的尖晶石均具有较低的Cr^#值和较高的Mg^#值。R1的斜长石为钙长石,熔体成分与斜长石相比具有偏高的MgO和FeO含量。计算...     

冲击钻凿岩石可钻性试验研究

冲击钻凿岩石可钻性的试验研究在坑探以及其它采掘工程中都有重要意义.本课题选择了点载荷、回弹仪和捣碎法等三种试验方法,进行了两次现场与实验室试验.在辽宁、江西、河南、陕西、安徽等省,共10个矿区的23种岩石中取得大量与凿岩机钻速V、回弹值RN、点荷强度Is（50）以及捣碎法普氏系数fT、岩石强度系数CRS等指标有关的原始试验数据.运用了概率统计、灰色系统理论以及模糊数学等分析方法,并借助微机进行了数据处理与回归分析.对于RN、Is（50）、fT、CRS等指标与钻速V的相关性进行了评价,结果表明:在显著性水平α=0.01下,点荷强度Is（50）与钻速V的线性相关显著.在显著性水平α=0.05下,仅有改装后的回弹仪HT100R4.5和NT225R6的回弹值R1和RN2与钻速V的线性相关通过检验,而RN1优于RN2.捣碎法普氏系数fT、岩石强度系数并不是在所有岩石中都与钻速V有相关关系.因此,提出予估风动凿岩机、直径40mm一字形钎头钻速V-的方程:V-=[61.68-3.97Is（50）]Kp·KN（cm/min）式中:Is（50）-岩石点荷强度（MPa）;Kp—风压校正系数;KN—凿岩机输出功率校正系数以点荷强度Is（50）和凿岩机输出功率N为变量绘成予估钻速的诺模图.以点荷强度Is（50）为分级指标将岩石可钻性分为七级.虽然,用回弹仪予估钻速的精度低于点荷仪,?     

贡嘎山现代植物叶蜡脂肪酸氢同位素组成及对海拔变化的响应

文章探讨了贡嘎山东坡不同海拔高度植物和土壤饱和脂肪酸的δDmax值,结果显示,土壤δDmax值与海拔显著负相关(R2=0.71),与前人报道的贡嘎山东坡土壤水、土壤正构烷烃δD值与海拔间的关系存在相同的趋势.植物δDax值与海拔间的关系与土壤水及土壤相似,但相关性不明显(R2=0.11),然而,研究结果显示木本植物和草...     

泥页岩中微量元素V、Ni、V/Ni与有机质丰度及成岩演化关系研究——以准噶尔盆地阜康凹陷为例

为了研究泥页岩中微量元素V、Ni、V/Ni值与有机质丰度和成岩演化阶段的关系,分析了准噶尔盆地阜康凹陷的大量泥页岩样品。结果表明,当tmax440℃时,V与tmax呈负相关,当tmax440℃时,V、V/Ni值与tmax呈正相关;Ni在大多数情况下也与tmax呈负相关,而V/Ni值在微量元素含量远低于页岩克拉克值时与tmax呈负相关,当其含量接近页岩的克拉克值时,与tmax呈正相关;当TOC0.4%或V、Ni含量远低于页岩克拉克值时,V、Ni与TOC含量的相关性不明显,而当TOC0.4%且V、Ni含量接近页岩的克拉克值时,TOC和V、Ni含量以及V/Ni值均呈正相关。V/Ni值受泥页岩沉积环境的有机质丰度和成岩演化阶段的影响,不宜作为泥页岩沉积环境的指示参数。     

施密特锤试验数据处理方法及其在预估岩石可钻性中的应用

本文目的在于寻求一种可靠的施密特锤数据处理方法,并探讨其用于岩石可钻性预估中的可能性。试验选择了HT100和HT225两种施密特锤,配3种冲杆(R25,R6.0和R4.5)组成了4种测定方案,在多种岩石中进行了测试。利用数理统计方法和灰色系统理论对数据的分布特征进行了分析,并提出:施密特锤试验的合理冲击点数是15点,每点至少冲击5次,舍去前两次回弹值,取15个冲击点后3次回弹平均值作为试验结果。 同时,还对回弹值和风动凿岩帆钻速V进行了回归分析,结果表明两者之间存在着良好的相关关系(在α=0.01水平上通过了F检验),据此提出了以回弹值预估凤动凿岩机钻速的计算公式。     

基于Hyperion数据的江西德兴矿区粘土矿物信息提取及其找矿意义

江西德兴矿区为我国重要的矿产资源基地, 目前面临资源枯竭的困境, 寻找替代的新矿产迫在眉睫.根据研究区野外土壤实测样品分析, 利用连续统去除的方法提取土壤实测光谱的特征吸收位置, 从而建立粘土矿物含量为因变量的预测方程.检验得知, 高岭石相关系数R为0.811, 拟合系数R2达到0.658, F值为5.275, Sig值为0.047 7, 其小于0.05;绿泥石相关系数R为0.893, 拟合系数R2达到0.797, F值为1.602, Sig值为0.016 6, 其小于0.05;伊利石相关系数R为0.783, 拟合系数R2达到0.619, F值为5.57, 对应的Sig值是0.075 4, 其大于0.05, 说明自变量与因变量之间具有高度相关性, 反演精度较好.从反演结果可知, 研究区的高岭石整体含量较高, 整体上粘土矿物高岭石、绿泥石和伊利石在1号坝、2号坝、4号坝和铜矿区含量较低.由于粘土矿物不断地经过地球化学变化、累积, 产生黄铁矿、黄铜矿及赤铁矿, 所以挑选粘土矿物富集并且地质构造活跃的区域为铁矿石及铜矿石预测区.结合研究区地质解译图与粘土矿物反演结果, 在采矿场与IV号尾矿坝向NE方向沿线上圈定两个遥感找矿有利区.      

基于土工布加固的不同温度条件下边坡稳定性分析

本文通过比较无土工布加固路堤、有土工布加固路堤和土工布加固路堤边坡情况,对坡度为1V?1H、1V?1.5H和1V?2H的路堤边坡进行稳定性分析。使用PLAXIS 2D通过改变温度和土壤热参数(容量、传导率和膨胀)的值对边坡稳定性进行热效应分析。研究结果表明：(1)土工布加固路堤边坡的稳定性随着热边界温度值升高而降低;(2)土工布加固路堤边坡的稳定性随着热膨胀值的增加而增加;(3)导热系数和比热容对其影响较小。研究结果可为相关工程提供参考。     

贵州松桃道坨锰矿含锰岩系地球化学特征 和沉积环境分析

道坨锰矿床是贵州锰矿整装勘查过程中新发现的全隐伏超大型锰矿床,其含锰岩系赋存于南华系大塘坡组第一段底部黑色页岩中,呈层状、似层状、透镜状产出。对含锰岩系主量及微量元素地球化学特征分析:其V/(V+Ni)、V/(V+Cr)、V/Cr、Ce/La值,及U、V、Ni、Mo等氧化还原敏感元素的富集程度显示其形成于缺氧环境。含锰岩系富集As、Mo、Ag、Sb,及Al/(Al+Fe+Mn)、(Fe+Mn)/Ti、Co/Zn值均显示热水沉积物特征,且在(Cu+Ni+Co)×10—Fe—Mn、Co/Zn—(Cu+Ni+Co)关系图解中,岩矿样品投影点均落在热水沉积区内,反映了热水作用对锰的富集和成矿影响甚重。此外,Al2O3/(Al2O3+Fe2O3)、Al/(Al+Fe)、Al/(A1+Fe+Mn)、(La/Ce)N值及(K2O+NaO2)—SiO2、La/Ce—Al2O3/(Al2O3+Fe2O3)图解指示含锰岩系形成于被动大陆边缘背景。     

鄂尔多斯盆地延长组长7段沉积岩元素地球化学特征及沉积环境分析

沉积岩的地球化学特征可以反映盆地沉积环境。为了探讨鄂尔多斯盆地延长组沉积时期古气候、氧化还原条件、古盐度等特征,对鄂尔多斯盆地东南部铜川延长组长7段的5个砂岩、8个页岩样品进行主量、微量以及稀土元素地球化学分析。结果显示,长7段细粒沉积物Al₂O₃/SiO₂值与K₂O/Na₂O值指示样品成分成熟度差别不大,黏土矿物含量较高。∑REE平均值为132.65×10^-6,明显低于北美页岩平均稀土元素含量,也低于全球平均大陆上地壳值;LREE分异程度较高,呈微弱的Eu正异常,无Ce异常。“C值”、Sr/Cu、Rb/Sr、Mg/Ca等指标显示延长组沉积期整体处于温暖潮湿的气候区。研究区样品富集微量元素U、Sc、Cs(平均20.11×10^-6、9.66×10^-6、6.08×10^-6),结合V、δU、Th/U、V/Cr、V/Sc、V/(V+Ni)等指标分析,结果指示延长组沉积期以底层水体呈强分层的还原环境为主。Li、Sr、Ni、Sr/Ba、(MgO/Al₂O₃)×100等值显示沉积期水体总体为淡水-微咸水。     

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