江苏碳酸盐岩地热水中锶元素水化学特征

通过分析江苏省15眼地热井的水样化学组分资料,得到碳酸盐岩地热水水化学特征以及Sr的分布规律,总结了江苏地区碳酸盐岩地热水中Sr水文地球化学特征,为碳酸盐岩中Sr的富集研究提供有益的启示。     

西藏日喀则市查孜地热田地质构造特征与形成机制

查孜地热田位于冈底斯-念青唐古拉断块隆起区之当惹雍错-许如错南北向地堑区,区内岩浆岩分布较为广泛,活动性断裂较为发育,拥有形成地热的良好地质条件。结合区域地质背景和地热田地质及地球物理场的研究成果,分析了查孜地热田地热资源的形成背景、赋存条件和分布规律。研究表明,地热田的热储层为古近纪古-始新统火山岩。大气降水及融雪水的入渗补给为地热水提供了丰富的水源,活动性断裂构成了地热水深循环的通道,广泛分布的岩浆岩体为地热水提供热能来源,本区地下热水的成因类型可划归为岩浆岩-构造断裂型。     

云南水富地热钻孔水的地质地球化学特征

本文讨论了金沙江河谷区云南水富地段内地热带的区域地质背景和主要地质构造格局,并通过对区内地热钻孔水及邻近的地表泉点、地表水的同位素与水化学分析研究,地热水的形成和成藏的地质地球化学过程探讨,指出地热区位于多方向构造的复合部位,发育的断裂构造利于富集和提供良好的热源和深部地下水循环通道,属中低温对流型地热系统;源于大气降水,补给区系区内最高,运移途径长,循环深度大,在含水层内的滞留时间最长,与热储层的能量交换充分.地热水具有水温稳定、水量大及承压的特点,有较大的开发潜力.     

贵阳市龙洞堡地区地热水成因及其特征研究

贵阳市地热水开发已多年,本文选取地热水开发新区龙洞堡进行研究,对其地热水成因、地温以及地下水化学特征等进行分析。结果表明:该区地热水主要储存于寒武系白云岩中,地热水贮藏条件良好且水量充足,上部有厚层砂岩作为保温层,区域的深大断裂为其提供了良好的热运输通道,地热水经过较长的水岩作用物质含量较高,地热水水化学类型为SO_4—Ca型水,其中锶、氟、偏硅酸的含量较高,水温、水质适合,具有一定的理疗效果,适用于进行温泉洗浴产业的开发。     

济源-开封凹陷东段馆陶组热储水化学特征及成因启示

对济源-开封凹陷东段馆陶组地热水进行分析研究发现,其水化学性质为中性水、盐水、极硬水,以Cl-Na型水为主,其化学特征、控制因素、特征系数等与上部明化镇组地热水、第四系地下水及地表水差异明显.馆陶组地热水为陆相含盐岩地层沉积型溶滤水,赋存介质为砂岩孔隙,区域发育的断裂、裂隙为其提供导热和运移的通道,在大地热流的传导增温下,不断发生溶滤作用、蒸发浓缩作用等,同时热储层封闭性良好,热水运移较停滞,还原性彻底,浓缩程度高.开封断隆内馆陶组地热水的以上特征与开封-兰考断陷相比程度更高.     

山西忻州盆地地热水地球化学特征及其成因机制

地热水地球化学研究对于认识各类水热型地热资源的成因机制有重要意义.以山西忻州盆地为研究区,开展了系统的地球化学研究.结果显示,忻州盆地地热系统的形成与地壳浅部岩浆房和浅部岩石放射性元素衰变热异常无关,而是正常热流背景下地下水深循环的结果 .地热水的水化学和氢氧同位素特征均指示区内地热水补给来源于西部云中山区大气降水,大气降水由补给区入渗并向东部忻州盆地运移,循环深度为1 618.3～3 451.5 m,热储温度达48.4～91.8℃.地热水上升至第四系孔隙热储后普遍混入浅层地下冷水,最高混合比可达78%.     

贵州省凯里市大中温泉地质特征及成因浅析

贵州凯里大中温泉位于凯里市舟溪水泥厂附近董公河，两处地热水出露点常年水温27～28℃。本文简要介绍了温泉的水文地质条件、地球物理、地球化学等特征，并简要分析了地热水形成的水动力特征和机理。     

安徽昭关温泉形成条件及地热水化学特征分析

昭关温泉位于安徽省含山县昭关镇,温泉的温度适宜,流量大。采用多种技术手段对昭关温泉出露区进行勘查,结合地层构造、地球物理、地球化学、地层温度以及水文地质等方面对地热形成条件及形成规律进行研究可知,推覆构造和断裂构造对地热具有控制作用,岩层受断裂构造作用,裂隙发育、破碎,隐伏溶洞、溶蚀裂隙及溶孔发育强烈,形成了水力联系的良好通道,这些均是形成昭关温泉的重要地质基础。温泉由早期大气降水补给,在埋藏于千米之下的热储中汇集、升温,在水头压力作用下顺断裂出露地表,形成41℃的地热水,水化学类型主要为SO_4-Ca·Mg型。分析结果为在类似地区寻找地热提供参考,促进地热勘查工作。     

石家庄凹陷地热资源研究

地热资源作为一种洁净环保能源被开发利用在石家庄有着悠久的历史.为评估地热资源开发潜力和前景,从石家庄凹陷区地热地质条件、已知地热信息及水文地球化学过程跟踪,归纳出地热水化学类型,分析石家庄地区地热水的形成时代、热储温度、热水动态特征,并对热水补给来源进行同位素分析.结果表明参与混合的冷水年代久远,地热水水温稳定,水量大,有较大开发潜力.     

基于水化学的北京及周边岩溶地热水形成条件研究

北京市及周边岩溶地热田地热水在由浅至深的深循环,在高水头作用下上涌的过程中,溶解了热储及围岩的岩盐、石膏等成分,并不同程度与浅部冷水混合,形成了现今的地热水水化学特征。水文地球化学与同位素特征表明,岩溶地热水的补给来源是北京市及周边山区的大气降水,北京平原区浅埋的岩溶冷水也可能形成补给。自补给区至岩溶热储深埋区,地热水的循环交替条件逐步变差,水质逐渐变复杂,变质程度逐步增高。水化学特征显示,除天竺、后沙峪和凤河营等水文地质环境较封闭的地热田外,北京市及周边大部分地热田的岩溶地热水补给条件良好,地热水的可开采资源量大。     

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.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

NONMETALS DEPOSITS

正20141520 Bo Ying(Key Laboratory of Metallogeny and Mineral Assessment,MLR,Beijing 100037,China);Liu Chenglin Saline Spring Hydrochemical Characteristics and Indicators for Potassium Exploration in Southwestern and Northern Tarim Basin,Xinjiang(Acta Geoscientica Sinica,ISSN1006-3021,CN11-3474/P,34(5),2013,p.594-602,5 illus.,3 tables,28 refs.)     

MATHEMATICAL GEOLOGY

正20141243Chen Ge(Hangzhou Research Institute of Petroleum Geology,PetroChina,Hangzhou 310023,China);Si Chunsong Study on Sedimentary Numerical Simulation Method of Fan Delta Sand Body(Journal of Geology,     

PROSPECTING EXPLORATION

正20142599Chen Sanming(Guangxi Key Laboratory of Concealed Deposits Exploration,Guilin University of Technology,Guilin541004,China);He Yuzhou Block Model and Reserves Estimation of Panzhihua Iron Deposit Based on 3D Geological Modeling(Journal of Guilin University of Technology,ISSN1674-9057,CN45-1375/N,33(4),2013,p.610-615,9illus.,1table,15refs.)     

STRUCTURAL GEOLOGY

正20140594 Bai Daoyuan(Hunan Institute of Geology Survey,Changsha 410016,China);Zhong Xiang Faults in the Jingzhou Basin and Their Tectonic Settings(Geotectonica et Metallogenia,ISSN1001-1552,CN44-1595/P,37(2),2013,p.173-183,6illus.,59refs.)Key words:basin evolution,tectonic setting,South China In the Upper Paleozoic and Jurassic se-     

STRUCTURAL GEOLOGY

正20141912Cao Hui(State Key Laboratory for Continental Tectonics and Dynamics,Institute of Geology,Chinese Academy of Geological Sciences,Beijing 100037,China)Gravitational Collapse and Folding during Orogenesis:A Comparative Study of FIA Trends and Fold Axial Plane Traces(Geology in China,ISSN1000-3657,CN11-1167/P,40(6),2013,p.1818-1828,9illus.,35refs.,with