共查询到20条相似文献，搜索用时 156 毫秒
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运用构造控水、水化学同位素、地下水动态等方法,对平凉南部岩溶裂隙水进行了深入的分析与讨论。该区储水空间以岩溶裂隙为主,岩溶水的空间分布明显断裂构造控制。裸露岩溶地下水以大气降水起源为主,浅埋型岩溶水多表现为混合水的特征。地下水动态呈现气候型,水岩相互作用形式溶滤-混合型,呈低矿化淡水。根据以上特征,划分了3个相对独立的岩溶水系统。 相似文献
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陇东盆地西部处于鄂尔多斯盆地西缘逆冲推覆构造带，新元古-下古生界碳酸盐岩裸露或浅埋，构成-南北向展布的岩溶水富集带。通过运用构造控水分析、水化学同位素等方法，对岩溶裂隙水系统进行了深入的分析与讨论。指出本区岩溶水的空间分布明显受南北向逆冲推覆构造控制，储水空间以岩溶裂隙为主，构造条件是岩溶发育和岩溶水富集的主要制约因素。岩溶水化学特征具有明显的南北差异，在补给条件优越的中南部平凉-华亭地区，水化学主要由含水层岩性及其赋存条件决定。岩溶地下水以大气降水来源为主，对于埋藏型岩溶水表现为多源水混合而成。根据岩溶水的空间分布与水动力场特征及其补径排条件，全区可划分为平凉、华亭和环西3个相对独立的岩溶水系统．并以此可作为水资源评价的基础。这些认识对于深入了解西北干旱-半干旱地区岩溶水赋存及富集规律、形成与演化机理和在该区开发利用岩溶地下水资源具有重要的科学意义。 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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大同煤田东北区寒武-奥陶系岩溶水以承压状态赋存于煤层底板之下,是当地重要供水水源,为确保煤田安全开采同时保护地下水资源,需对大同煤田东北区岩溶水系统特征进行分析。文章利用钻探、测井手段及水化学、水位监测数据、矿井开采资料及实地调查对研究区内岩溶水系统特征进行分析,认为研究区寒武-奥陶系岩溶顶板标高变化特征与煤向斜发育特征一致,岩溶含水层厚度发育极不均匀;研究区大部分地区为弱径流区,水化学类型以HCO3·Cl-Na型为主;地下水水源补给为西部上覆含水层越流补给和东部露头区入渗补给;研究区水位逐年下降,且呈逐年增大下降趋势,这是由于区内人工排泄点增多、人工抽采量大导致;研究区岩溶水峰值水位滞后雨季一到两个月。依据本结论对研究区煤田安全开采及岩溶水合理取用有指导意义。 相似文献
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山东省枣庄市峄城水源地是个典型的北方埋藏型岩溶水水源地。峄城盆地出露的岩溶地貌有干谷、溶洞、岩溶准平原、溶蚀裂隙、溶沟、溶槽、溶痕等，地下岩溶形态主要为溶洞、溶蚀裂隙和溶孔，岩溶的发育具有层控性、水平分带和垂直分带等特点和规律。该盆地岩溶水系统的含水介质为寒武系、奥陶系的灰岩、白云岩，以溶隙、溶孔为主加少量小型溶洞构成了一个统一的互相连通的地下水空隙网络系统，为地下水的运移、储存提供了通道和空间。岩溶水流在此空隙网络系统内具有渗流性质，流态以层流为主，形成一个基本统一的单斜扇形水动力网，并具有统一的水化学场，该盆地分间接补给、直接补给、汇集排泄和汇集四人输导功能区。并在汇集区形成了具有供水意义的大型岩溶水水源地。 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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正1 Introduction Geological studies established on several sections in Lanping-Simao basin have shown that the salt-bearing strata of Mengyejing formation(Yunlong Fm.in Lanping basin)are constituted by an alternation of salt layers and interbedded facies.The latter consists mainly of mudstones,and mudstone-rich conglomerate.The mineralogy and geochemistry of salt-bearing beds and 相似文献
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正On 22nd April 2014,with the approach of the 45th World Earth Day,China’s Ministry of Land and resources issued the status of China’s mineral resources in 2013.The first task of the prospecting breakthrough strategy action implemented in the last five years has been completed,and China’s security capacity for mineral resources has been significantly improved.In the 相似文献
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正There are more than 700 salt lakes with area of more than 1km2 on the Qinghai-Tibet Plateau of China.In recent years,an oilfield brine was also found in the Nanyishan Section of Qaidam Basin in the Qinghai-Tibet 相似文献
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正1 Introduction Physical and numerical models are constructed to investigate the evolution and mechanism of salt migration driven by tectonic processes.In recent years,we have designed and ran series of models to simulate salt 相似文献
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YUAN Qin LI Jianguo QIN Zhanjie WEI Haicheng SHENG Shurong SHAN Fashou 《《地质学报》英文版》2014,88(Z1):276-276
正The study of Cretaceous-Palaeogene salt-bearing strata of the Khorat Basin Laos and the Lanping-Simao Basin in Yunnan,China has an great significance not only in explaining the basin evolution and the genesis of potash 相似文献
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正Potash is one of the long-term scare deposits in China,and potash prospecting has long been listed as a key brainstorm project for our nation and geological prospecting units.There have been considerable studies in search for potash deposits in the Kuqa depression of the Tarim basin(Jackson et al.,1991;Gemmer et al.,2004;Vendeville,2005;Vendeville and Jackson,1992a,1992b), 相似文献
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正1 Introduction Qaidam Basin in Qinghai,including 43 salt lakes with multiple dominant mineral such as potassium,magnesium,lithium etc.,is the most intensive distribution of Saline 相似文献