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地热田的形成往往与地质构造有着千丝万缕的联系，神堂沟即是如此。笔者从地温场及水化学场的演变出发，揭示了地质构造F1断层、Fa边山断裂带及冶峪向斜的控温作用，它们共同贡献形成的集水“凹槽”是热水田存在的主导因素，而上覆第四系黄土盖层的保温隔热性能为其提供了保证，使神堂沟地热田在众多的边山断裂热水点中脱颖而出。 相似文献
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湖南洛塔表层岩溶带水文地质地球化学特征分析 总被引：15，自引：3，他引：12
湖南洛塔为西南具有一定代表性的溶丘洼地型岩溶区,本文利用近两年来洛塔水环境监测资料,进行洛塔表层岩溶带的水化学和水温场特征的研究,认为该表层岩溶带的水化学和水温场的特征与气候、生态环境和岩溶含水介质等多种因素明显相关。不同影响因素对表层岩溶水水化学组分的作用有所不同,表层岩溶带岩溶水受气候影响较大,大气降水的降雨强度,直接影响到地下水化学组分含量的大小,总硬度和HCO-3 含量与降雨量呈明显的负相关关系,植被、土壤的覆盖程度与水化学组分含量高低呈正相关性。 相似文献
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针对太原盆地区碳酸盐岩中—低温地热系统与边山岩溶水系统的相互作用关系这一难点问题, 以地质构造分析为背景, 以岩溶水的水化学、同位素组成特征为线索, 重塑了太原盆地区碳酸盐岩中—低温地热系统地质演化过程.获得了如下3方面的认识: (1)该系统经历了自燕山运动以来的5个阶段的地质演化过程.在晚第三纪至早更新世阶段的稳定沉降期, 该系统与边山岩溶水系统开始分离, 并各自演化.(2)该系统的岩溶作用来自于2个方面: ①中更新世晚期-晚更新世早期的大气降雨沿汾河等断裂带下渗, 经与石炭—二叠煤系地层中的金属硫化物作用, 形成富含硫酸的地下水, 补给碳酸盐岩热储层, 并与其中存留的更古老的岩溶水混合, 促进了碳酸盐岩溶解; ②受中更新世晚期-晚更新世早期盆地基底岩浆的烘烤, 碳酸盐岩发生热解.(3)该系统中的岩溶热水形成于中更新世晚期-晚更新世早期, 由于上覆盖层良好的保温作用而封存至今.其分布范围受地质构造的控制, 东西向分别以东山、西山断裂为界, 南以田庄断裂为界, 北以亲贤地垒北边界为界. 相似文献
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裂隙岩溶含水系统较为复杂,从水位动态和水化学组份难以判断孔隙水和地表水对其影响程度的主次性。本文通过水位和水化学组份的灰色关联度分析,结合水文地质特征,将二者对裂隙岩溶含水系统的影响程度的主次性进行量化比较,进一步验证了水文地质条件。 相似文献
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桂林岩溶试验场钻孔水化学暴雨动态和垂向变化解译 总被引：22，自引：7，他引：15
用多参数自动记录仪对桂林岩溶试验场的CF1钻孔(代表裂隙含水介质)和CF5钻孔(代表管道含水介质)水化学进行了暴雨动态和垂向变化的监测,通过数据的分析及对比,发现: 暴雨时至少有两个重要的作用在控制着水化学的动态变化,一是雨水的稀释作用,另一个是碳酸盐岩— 水— CO2 气相互作用。然而,这两个作用在管道含水介质和裂隙含水介质中的表现是不同的: 对于裂隙含水介质,碳酸盐岩— 水— CO2 气相互作用占主导,而对于管道含水介质,雨水的稀释作用则成为主控因素。因此,鉴于岩溶水化学是在碳酸盐岩- 水- CO2 气三相相互作用的开放系统中形成的,所以水化学的研究不能仅考虑水- 岩相互作用,而必须重视CO2 时空变化对水化学的控制,只有从三相系统全面考虑,才能正确把握岩溶水化学的时空演变规律。此外,试验场相距不到5m的CF1和CF5钻孔水化学时空变化的显著差异,进一步证明了岩溶含水介质的非均质性特征。 相似文献
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松藻矿区是我国煤层气资源富集区之一。为揭示松藻矿区地下水对煤层气富集影响,利用煤田勘查获取的水文地质资料,基于含水层结构、水化学特征、抽水资料的系统分析,阐明了含煤地层上覆和下伏含水层地下水的空间展布特征,建立了地下水的分布模式,探讨了地下水动力场对煤层气富集的影响。研究表明:松藻矿区含水层和隔水层相互叠置,随着埋深的增加含水性减弱;含煤岩系与上覆、下伏含水层缺乏水力联系,为相互独立的含水系统;上覆长兴组和下伏茅口组地下水动力场呈南高北低展布;地下水动力场有近河流岩溶裂隙渗入型、断层沟通岩溶裂隙补给型、稳定承压弱含水型三种类型,以稳定承压弱含水型为主;含煤岩系的极弱含水性及其与上覆、下伏含水地层缺乏水力联系构成了区内水文地质控气基础,是研究区煤层含气性高的重要控制因素。 相似文献
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西北干旱区深层岩溶地下水系统的水化学-同位素研究--以宁南“南北古脊梁”岩溶水系统为例 总被引：9，自引：0，他引：9
运用构造控水分析、水化学同位素等方法，对宁南“南北古脊梁”岩溶裂隙水系统进行了深入的分析与讨论。本区储水空间以岩溶裂隙为主，岩溶水的空间分布明显受南北向大型断裂构造控制。岩溶地下水以大气降水起源为主，并表现为多元水混合。水质分布呈南优北劣的分带特征，北部水-岩相互作用形式为溶滤-蒸发浓缩型，呈高矿化咸水；南部为溶滤-混合型，呈低矿化淡水。根据水动力场和水化学场特征，划分了3个相对独立的岩溶水子系统。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
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. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
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. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
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. 相似文献
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Emmanuel Skourtsos Daniel Vachard Alexandra Zambetakis-Lekkas Rossana Martini Louisette Zaninetti 《Comptes Rendus Geoscience》2002,334(12):925-931
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. 相似文献
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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.) 相似文献
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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.) 相似文献
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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.) 相似文献
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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., 相似文献
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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 相似文献