首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 46 毫秒
1.
渭河断陷盆地地热资源赋存特征与热储分析   总被引:5,自引:0,他引:5  
渭河盆地地处多个构造体系的交汇部位,呈现多条断裂带。这些断裂带控制着渭河盆地的基底构造以及地热资源的展布。在充分收集区域地质、水文地质、物化探及地热资料基础上,通过对断裂构造特征的研究,分析了渭河盆地地热资源的形成背景、赋存条件、分布规律及特征,为进一步研究、勘探及开发地热资源提供了依据。  相似文献   

2.
本文以渭河盆地地温场为研究对象,在收集补充新地热井资料及分析测试样品的基础上,通过盆地深部结构、构造特征、地温场特征、热储层特征、地热资源量等分析,建立了盆地不同岩性岩石热导率与深度关系图版,确定了盆地地温场变化规律及地热田控制因素,提出了渭河盆地地热田形成模式。评价了盆地地热资源有利区,为盆地后续的开发利用提供了理论支持。研究认为渭河盆地热地温梯度分布在2.34~5.85℃/100m之间,平均地温梯度为3.50℃/100m,代表性大地热流68.33mw/m~2,地温梯度及不同深度地层温度具有东高西低、南高北低的特点。热导率总体上具有随深度的增加,逐渐增大的规律,热导率随深度增加主要受压实程度增强控制。相同深度条件下泥岩热导率最低,砂岩热导率居中、白云岩热导率最高。渭河盆地主要为层状地热田,盆地内地热通过热传导及热对流两种方式进行传递,以热传导为主。渭河盆地地热资源丰富,热储层可分为三种类型:①新生界砂岩孔隙型;②下古生界碳酸盐岩岩溶型;③断裂型。渭河盆地地热资源有利区主要分布于西安凹陷、固市凹陷。盆地地温场及地热田分布与莫霍面、软流圈上隆、岩石圈厚度减薄的深部背景密切相关,主要受地热传导和深大断裂热对流控制,是岩石圈深部结构、盆地构造、基底岩性、储盖组合等多因素共同作用下形成的。最后结合当前渭河盆地地热资源开发利用现状及存在问题,提出了地热开发利用建议。  相似文献   

3.
通过对渭河盆地热背景、资源量、热储层、开发利用现状及开采技术的发展等方面对开发利用现状进行了阐述。渭河盆地莫霍面上隆,岩石圈厚度薄,沉积层生热与深部热流传导的热量导致渭河盆地地热资源异常丰富,主要分布在西安、渭南、咸阳等地。盆地地热资源储量高、用途广,但中深层地热资源开发利用需要研究机构、政府和产业部门等联合出台相应的规范和标准,以规范市场、确保安全绿色高效生产。当前和未来渭河盆地中深层地热资源开发主要是采灌结合与深井地埋管相结合的方式,深井地埋管开发是地热开采的新思路,也是今后技术攻关的主要方向。  相似文献   

4.
甘肃省地温场分布具有造山带高于挤压造山型盆地的特征,地温场分布与构造活动性密切相关。地热资源分布可分为隆起断裂型和沉降盆地型两类,隆起断裂型地热资源分布在北山、祁连山、西秦岭3条造山带和纵贯秦祁的SN向构造带。沉降盆地型分布在安西一敦煌盆地、河西走廊盆地群、陇西盆地群和陇东盆地等4个盆地中。SN向构造带是甘肃省地热资源目前开发最多地段。  相似文献   

5.
王迎国  常宏  周卫健 《地质论评》2021,67(3):67040007-67040007
渭河盆地渭河及其各支流演化历史与区域构造、气候变化密切相关,因此盆地内各河流阶地的成因和演化是研究渭河盆地环境演变的重要科学问题。河流阶地之上黄土的磁性地层学被普遍用来获得盆地内河流阶地形成的年龄。尽管粉尘物质在第四纪以来覆盖了盆地大范围区域,河流阶地形成与粉尘物质最终保存在阶地之间可能还存在一定的时间差异。所以,尽管借鉴黄土—古土壤序列的区域对比,能够推断河流阶段的年代范围,仍需更多绝对年龄方法对其进行约束。本文通过渭河盆地内渭河不同支流河流阶地形成年代、拔河高度等的综合分析,结合大范围区域隆升过程及第四纪气候演化序列对比,发现并不是所有气候变化的重要节点就有相应的河流阶地形成,河流阶地年龄空间分布也有一定的区域性特征,提出渭河盆地河流演化与构造运动造成潜能及气候变化诱发这些潜能的释放密切相关。所以,渭河盆地河流阶地主要是在大范围的构造隆升和气候变化共同作用下的构造—气候旋回阶地。渭河盆地水系演化史的重建对全面认识黄河中游水系早期的形成演化具有重要意义,尤其是解决渭河、黄河贯通三门峡的争议,但还需要更多可靠的不同河流地质证据和多种分析数据的印证和约束。  相似文献   

6.
渭河断裂西段活动差异性分析   总被引:17,自引:0,他引:17  
渭河断裂是一条纵贯渭河盆地中部的大断裂,对渭河盆地的形成和发展乃至盆地内的地震活动都具有控制作用。本文将宝鸡峡口以东,西安市草滩镇以西的渭河断裂西段作为研究区。从渭河断裂北侧黄土台源地貌存在的分级现象、自西向东渭河断裂新近系错距大小非均匀变化、渭河断裂西段断坎地貌差异等方面的分析,讨论了渭河断裂西段存在的活动差异性,认为以千河断裂、岐山-马召断裂和泾河推测断裂为分界点,渭河断裂西段可分为三个亚段,各个亚段在断裂活动时间、活动强度等方面均有明显的差异。通过对渭河断裂西段所处新构造环境的分析,认为第四纪以来渭河盆地西部地壳的向东掀斜拾升运动是造成渭河断裂西段出现差异性活动的根本原因。  相似文献   

7.
谢娜  喻生波  丁宏伟  张明泉 《中国地质》2020,47(6):1804-1812
甘肃省地热资源丰富,其地热资源的开发利用具有较大的潜力。本文介绍了甘肃省地热资源分布概况,结合地区构造、地热水化学特征、地热资源量及开发利用现状探讨了甘肃隆起山地对流型与沉积盆地传导型地热资源的赋存特征,并对两种类型地热资源潜力进行了分析评价。结果表明,沉积盆地地热资源分布于河西、陇西及陇东盆地等,热储类型为裂隙型和孔隙型,热储层自元古宙至新生代均有发育,岩性以砂岩为主;隆起山地型地热资源主要分布于祁连山和西秦岭造山带,热储类型为断裂破碎带,岩性以花岗岩为主;通过潜力计算得知,全省热量开采系数≥0.4的仅占29.17%,表明目前甘肃地热资源开采程度较低,开采潜力较大。  相似文献   

8.
樊小舟  齐新刚 《地下水》2007,29(2):96-100
渭河盆地北缘地质构造相对简单,地热异常明显,储热层发育,有丰富的地热资源,具备地热井成井条件.分析了三原县地热发育的地质条件和热储层的形成,认为开发利用三原县城区的地热资源是切实可行的.  相似文献   

9.
前人应用地质力学和构造体系的观点建立了宜溧地区交叉网络的构造格架。近年来在宜溧山区开展了地热资源勘查与研究工作,对本区的构造组合样式又有了新的认识。结合地热勘查的最新成果,对宜溧山区的构造样式组合进行了分析研究,认为宜溧山区大致以烟山—大贤岭铲形推覆体为界可分为溧阳火山凹陷构造区与张渚—湖滏煤系盆地构造区,两构造盆地在构造样式组合、运动序次和演化时序上均有较大区别。  相似文献   

10.
西安市地处中国北方的渭河盆地新生代断陷区,现代地壳活动强烈,区域地壳稳定性薄弱,给西安城市建设和发展带来了不利影响,本文的主要内容和结论如下:新生代以来,渭河盆地深部地幔作用下,受到南北向拉伸应力场控制,形成了由东西向构造,祁吕贺山字型构造,新华夏系,陇西系及北北西向构造组成的复杂的构造网络系统,渭河盆地内发育规模较大的活动断裂20余条,它们具显著的继承性,活动速率最大为2.0-2.4mm/a区域  相似文献   

11.
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   

12.
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   

13.
Robert L. Linnen   《Lithos》2005,80(1-4):267-280
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   

14.
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).  相似文献   

15.
China, as many other parts of the world, has a serious shortage of water resources. In China, there is a total amount of 2.8×10^12 m3 of freshwater, but that is only 2000 m3 per capita, which is about one quarter of the world average. Thereforc, seawater desalination engineering is of great significance to the nation.  相似文献   

16.
正Dear Authors and Readers:First of all,on behalf of the new Editorial Board,I would like to express our sincere appreciation for your continuing support of our journal.This journal,founded in 1922,is the oldest geological journal in China.As the flagship journal of the  相似文献   

17.
正The Wulashan-Hademengou gold ore district in Baotou city,Inner Mongolia,is a further newly discovered super-large gold metallogenic belt in northern China.The accumulated proven gold metal amount is 84.46 t,with an average grade of3.53 g/t and a gold metal amount of 63.16 t,with an average grade of 3.30 g/t.The potential reserves are over 100 t.  相似文献   

18.
正Since the first discovery of the excellent performance of nickel-bearing iron alloys in 1889,scientists have developed3000 more kinds of nickel alloys,which still have an enormous market demand at present.However,the scarcity of global nickel ore resources has restricted economic development.In recent years,experts from the Institute of Multipurpose Utilization of Mineral Resources have studied the comprehensive utilization technique of low-grade nickel ores from  相似文献   

19.
正Professor Shu received his undergraduate training in Paleontology at Peking(Beijing)University in1964–1969,obtaining his Master's degree at Northwest University(Xi’an)and Ph.D.in China University of Geosciences(Beijing);he was Visiting Scholar at the Smithsonian Institution,Washington,D.C.,USA in 1988,Humboldt Research Fellow at University of Bonn in 1988–1989,at University of Wuerzburg,Germany in 1994–1995,and Visiting Scholar at Cambridge University,UK  相似文献   

20.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号