新泉盆地热矿水田赋存特征分析

经检测,新泉盆地DR6地热井水已达到医疗价值浓度和矿水浓度标准,具有一定的医疗价值.通过对本区热矿水田赋存特征的分析,提出了该热矿水田受NE向和NW向断裂构造复合控制.因此,断裂构造复合部位附近是地热资源的开发方向.     

相山铀矿田热流特征

本文通过对相山铀矿田放射性元素衰变热量的研究，阐述了矿田热的性质；计算了放射性元素衰变热对大地热流、地温梯度及地温场的影响。结果表明：放射性元素的集中富集，改变了矿田的地热结构，但是对地温场的影响较小。     

采用水化学方法对青岛北部地区地热资源远景的探讨

采用水文地球化学方法，根据青岛地区50多个地下水样品的测试分析结果进行了地下热储温度的推测，结合遥感解译、测温、地质背景条件等资料综合分析，圈定出3个地热远景区，即温泉地热远景区、黄家山地热远景区和流亭地热远景区，这3个地热远景区均分布在NNE向断裂与NW向断裂交汇部位上。通过对该区地热地质特征初步分析认为，其热储概念模型属深循环对流型。     

内蒙古宁城地热资源的构造制约与勘查标志

内蒙宁城地热区位于华北板块北缘,是我国北方重要的矿带和矿田。本次研究对宁城地区成热控热构造系统进行厘定和研究,用成生联系的思想综合分析了不同尺度的控热断裂带之间的联系,包括嫩江-八里罕断裂、黑里河断裂和大庙-锦山断裂,阐述了不同系统的主干构造体系及其复合对地热分布的控制。嫩江-八里罕断裂南段"山"字形构造的NW向断裂,向SE向发生近40°错移,偏转后呈"S"型弧形弯曲,在转折端西侧构造应力集中的深成隐伏侵入岩蚀变带中出现地热异常。同时,SN向的热水镇-大营子断褶带后期继承性改造使断层向SN两翼外扩,为深成岩浆侵入及热能上升提供了通道,可能是地热形成的主要构造因素。由于岩浆侵入活动加剧,造成地热区差异性上升运动,使壳源深部热源上移;地下水在深部循环加热后,在高海拔补给带的静水压力下沿断裂通道上升,形成地热流体。     

汝城地热田地热井非线性增温成因浅析

湖南省汝城县热水镇地热勘查区位于诸广山铀矿矿集区,区内震旦系—寒武系地层和诸广山岩体铀元素的背景值是克拉克值的4倍以上,鹿井、丰州等大型—特大型铀矿及矿点有数十个之多,呈NNE向分布。温泉与铀矿在空间分布上有一致性分布规律,诸广山岩体放射性矿物放热的累加,使之核心温度可达320℃,是异常高温的主要来源,是本区400 m以浅地热和4000 m以浅干热岩的主要热源,深部地核传导热与金属硫化物氧化放热是次要因素,中生代岩浆岩的岩浆余热对热异常贡献率较小。这是本区地热探井增温率呈非线性的"舌"状形态,而不是常规的与孔深呈线性耦合的原因。NE向遂川—热水断裂带与NW向常德—安仁断裂带在本区交汇,断裂带下切岩体深部基底,是主导热和铀矿控矿构造,次级张性断裂是热水和铀矿容矿构造,控制了非线性增温地热异常。花岗岩中(或外接触带)铀矿放射性元素放热和构造活动带中的金属硫化物氧化放热,形成了高地热增温率异常,具有干热岩和铀矿(或金属硫化物矿)找矿远景,建议树立综合找矿思维,运用地质及物化探综合手段,在开展干热岩资源勘查时,注意铀矿资源赋存条件与信息,对其持续探索,有可能达到"热—铀兼探"和"热—铀兼采"目的。     

北京市密云县地热资源开发利用可行性探讨

地热作为一种“热、矿、水”三位一体的清洁新能源和资源,越来越受重视和利用。经过初步调查和可行性研究,密云地区具有地热赋存条件。本文介绍了密云周边地热开发现状,提出了进一步开发利用地热资源的设想。     

浙江省水热型地热资源特征及赋存规律

浙江省水热型地热资源较为丰富,但地质条件复杂,勘查风险较高。本文基于前期的地热工作成果,对省内已有地热资源的热储岩性、主要控矿构造、主要指示性指标和地热水地球化学特征进行分析总结,将浙江地热资源归纳为三大类九亚类,得出北西向和北东向断裂是水热型地热资源赋存的主要部位,尤其是活动性断裂、高氟区断裂和强地震区断裂,具有较佳的成矿条件。浙江地热水的补给来源为古大气降水,温度、化学组分等与赋存环境密切相关,水温与储层埋藏深度一般呈正相关,但隆起区地热赋存裂隙往往与浅地表冷水裂隙贯通,缺少天然的隔水屏障,冷水混入比例较高,呈现古大气降水与现代大气降水双重补给的特征。     

平顶山八矿地热温标的选取及热储温度估算

在地热系统中,地热温标通常被用来评价地下热储温度,但是众多地热温标计算出的热储温度往往相差很大,需要进一步判断矿物-流体的平衡状态。以平顶山八矿地热系统为例,讨论了地球化学温标的应用条件;通过Na-K-Mg三角图及以WATCH程序建立的多矿物平衡法在该矿的应用,证实玉髓地热温标最适合估算该矿区深部热水温度,该矿区深部热水温度约为50℃。      

青海格尔本查明──大型饮用矿水田

青海格尔本查明一大型饮用矿水田国家自然科学基金资助的《青海省格尔本大型食银饮用矿水田形成机理研究》项目，于１９９３年】】月】６日，由青海省科委聘谓的专家在北京进行了评审．与会专家认为，这是我国目前发现的罕见的大型饮用矿水田，在理论和实际应用上均有重要...     

格尔木冲洪积扇地下水锶物质流通量分析

在分析格尔木含锶矿水田供锶环境和水迁移条件的基础上，将形成含锶矿水田的地质空间分为两个区：山区淋溶迁移区和平原迁移聚集区，运用物质流通量分析的观点，对锶的迁移聚集进行了系统分析，山区为锶矿水的形成提供了物质环境，平原区为锶矿水提供了贮存环境。     

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.     

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).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

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GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861