低空遥感地质灾害目标数据集的制作及测试     

詹总谦  黄兰兰  张晓萌  刘异 《测绘地理信息》2022,47(3):100-107

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川西北中二叠统茅口组储层特征及成因     

郝毅  周进高  倪超  辛勇光  厚刚福  陈薇 《四川地质学报》2014,(4):501-504

对四川盆地西北部钻井岩心、露头剖面样品的宏观及微观岩石学特征研究认为,川西北茅口组储层类型主要为生屑灰岩,储集空间主要为生物格架孔、粒间溶孔、粒内溶孔、溶蚀孔洞及裂缝。茅口组储层的发育主要受到沉积微相、古岩溶作用及构造作用等因素控制。其中沉积微相是储层形成的物质基础,古岩溶作用是储层形成的关键因素,而构造裂缝是储层改善及连通的重要因素。  相似文献   

基于嫦娥二号微波辐射计数据月球中低纬度亮温异常区地质分析研究   总被引：1，自引：0，他引：1  

连懿  陈圣波  孟治国  张莹  路鹏 《地球学报》2014,35(5):643-647

月球表面的微波辐射亮度温度与月表地质结构和月表物质的物理化学特性相关。为了对月球亮温分布异常区域进行地质分析,文章首先计算嫦娥亮温数据的时角,采用克里金插值的方法得到了不同频率不同时刻中低纬度的微波亮温图。结合奇异值分解(SVD)模型分析了月表亮温变化异常,结果表明风暴洋位置和靠近月海东北部的高地区域等存在亮温变化异常,月海区域(除风暴洋外)为3 GHz和37 GHz两个场的总体相关区域。通过对月球火山分布地区的区域亮温变化进行分析,发现这热异常可能是由于月球火山活动造成的。  相似文献   

西澳州Cattle Creek地区铜镍硫化物矿床成矿潜力探讨     

王凡  李健  胡中国  邓小林 《化工矿产地质》2014,(2):85-93

西澳州Catlle Creek地区位于金伯利地块西缘霍尔斯克里克(Halls Creek)活动带上,附近发育有深大断裂。研究区内发现多处基性-超基性小岩体及岩脉且存在两处矿化点(带),存在两处1∶5万土壤地球化学甲类综合异常区,二者均主要由Cu、Ni、Au、Mo、Co等元素组成,多个浓集中心,异常套合较好,Cu、Ni的极大值均超过或接近边界品位,甚至工业品位,二者与矿化等信息套合良好。岩体中岩石样品主量元素特征显示其具有辉长岩-苏长岩的成矿专属性特征;在AFM图解上,岩石样品显示原始岩浆为高MgO拉斑玄武岩系列。微量元素原始地幔标准化蛛网图表明岩体岩浆演化过程中发生过明显的陆壳物质同化混染作用。稀土元素配分图反映出成岩过程中有相似的分异演化过程,并表明岩浆在演化过程中存在明显橄榄石分离结晶作用。研究区与萨凡纳矿床具有很高的可对比性,同时符合古大陆内小岩体成矿系统理论。表明研究区具较高的成矿潜力。  相似文献   

四川盆地震旦系灯影组葡萄状白云岩成因   总被引：1，自引：1，他引：0       下载免费PDF全文

张杰  Brian Jones  潘立银  周进高  秦玉娟  郝毅  武明德 《古地理学报》2014,16(5):715-725

四川盆地震旦系灯影组发育巨厚的白云岩,其中灯影组二段和四段发育大量具有各种形态的葡萄状白云岩,其直径最长可达75cm,有的平行于层面,有的穿层。剖面资料表明,葡萄状白云岩发育多期等厚环边胶结物,中部残留大量未充填的不规则洞穴,这成为与岩溶喀斯特作用相关的地下溶蚀作用的证据。围岩泥晶白云石为早期海水中原生结晶的产物,后来的胶结物可划分为4期: (1)自泥晶化白云石(部分样品中可见)作为最早的一期胶结物,由于各种生物化学作用和生物作用的影响而紧贴着围岩发育;(2)第2期胶结物纤维状白云石可能为海水中直接沉淀的产物,经历后期成岩作用后,具有完全有序的结构,晶胞参数接近理想值;(3)细—中晶白云石为第3期胶结物,包含纤维状白云石溶蚀残余,形成于构造抬升之后的近地表大气淡水环境;(4)第4期胶结物中—粗晶白云石为埋藏环境下直接结晶的产物,充填了孔洞中心,残留部分未充填孔洞。灯影组受到了岩溶喀斯特作用、胶结作用以及白云石化作用等成岩作用的影响,其中与葡萄状白云岩有关的岩溶喀斯特作用对于灯影组储集层的发育至关重要。对灯影组葡萄状白云岩的研究,不仅有助于深入探讨灯影组储集层成因和演化及灯影组白云岩的成因,而且有助于指导四川盆地前寒武系油气勘探。  相似文献   

湖南毛易矿区及外围构造分带分段特征     

蒋艾林  曹代勇  王林杰  陈建明  周荣洲  刘登 《中国煤炭地质》2014,(8):95-98

毛易矿区位于湖南长邵断坳北段,属于涟源坳陷中部隔挡式褶皱带,区内逆冲推覆构造较为发育。通过野外观测及资料整理,分析了研究区构造几何形态,得出矿区及其外围构造具有明显分带分段特征的结论:以向斜为主体,向斜两翼发育逆冲推覆构造,自北向南可分为北段、中段、南段;根据褶皱展布特征,自西向东可分为西带,中带和东带。研究认为,西带构造变形强于东带,研究区构造演化为共轭逆冲断层模式,受后期构造影响,煤系不均匀分布于西带和东带,其中北段东带与南段东带逆冲构造下伏地层是有利的找煤区域。  相似文献   

Zero-valent iron/persulfate(Fe0/PS) oxidation acetaminophen in water     

J. Deng  Y. Shao  N. Gao  Y. Deng  C. Tan  S. Zhou 《International Journal of Environmental Science and Technology》2014,11(4):881-890

Zero-valent iron (Fe⁰), as an alternative iron source, was evaluated to activate persulfate (PS) to degrade acetaminophen (APAP), a representative pharmaceutically active compound in water. Effects of key factors in the so-called Fe⁰/PS process, including Fe⁰ dosage, initial pH, temperatures and chelating agents, were studied. Under all the conditions tested, the APAP degradation followed a pseudo-first-order kinetics pattern. The degradation efficiency of APAP was highest when the Fe⁰ to PS molar ratio increased to 1:1, and the degradation rate constant and removal were 23.19 × 10^?3 min^?1 and 93.19 %, respectively. Comparing with Fe²⁺, Fe⁰ served as an alternative iron source that can gradually release Fe²⁺ into water, thereby consistently activating PS to produce sulfate radicals. The Fe⁰/PS system was effective in a broader pH range from 3 to 8.5. Heat could facilitate production of sulfate radicals and enhance the APAP degradation in the Fe⁰/PS system. High reaction temperature also improved the Fe²⁺/PS oxidation of APAP. Finally, sodium citrate (a chelating agent) at an appropriate concentration could improve the APAP degradation rate in the Fe²⁺/PS and Fe⁰/PS system. The optimal molar ratio of Fe⁰ to citrate depended on solution pH. Our results demonstrated that Fe⁰ was an alternative iron source to activate PS to degrade APAP in water.  相似文献   

Landslide susceptibility mapping based on GIS and information value model for the Chencang District of Baoji,China     

Wei Chen  Wenping Li  Enke Hou  Zhou Zhao  Niandong Deng  Hanying Bai  Danzhi Wang 《Arabian Journal of Geosciences》2014,7(11):4499-4511

The main objective of this study was to apply a statistical (information value) model using geographic information system (GIS) to the Chencang District of Baoji, China. Landslide locations within the study area were identified using reports and aerial photographs, and a field survey. A total of 120 landslides were mapped, of which 84 (70 %) were randomly selected for building the landslide susceptibility model. The remaining 36 (30 %) were used for model validation. We considered a total of 10 potential factors that predispose an area to a landslide for the landslide susceptibility mapping. These included slope degree, altitude, slope aspect, plan curvature, geomorphology, distance from faults, lithology, land use, mean annual rainfall, and peak ground acceleration. Following an analysis of these factors, a landslide susceptibility map was produced using the information value model with GIS. The resulting landslide susceptibility index was divided into five classes (very high, high, moderate, low, and very low) using the natural breaks method. The corresponding distribution area percentages were 29.22, 25.14, 15.66, 15.60, and 14.38 %, respectively. Finally, landslide locations were used to validate the results of the landslide susceptibility map using areas under the curve (AUC). The AUC plot showed that the susceptibility map had a success rate of 81.79 % and a prediction accuracy of 82.95 %. Based on the results of the AUC evaluation, the landslide susceptibility map produced using the information value model exhibited good performance.  相似文献   

基于地层结构组合的第四纪地质单元划分研究——以皖江经济带沿江丘陵平原区为例          下载免费PDF全文

苏晶文  龚建师  李运怀  李云峰  王毅  董长春  杨洋  叶永红  魏峰  朱春芳  王睿  蔡磊 《中国地质调查》2014,6(5):28-35

为支撑地质条件复杂地区的水文地质、工程地质和环境地质调查研究,在皖江经济带沿江丘陵平原区通过系统分析第四纪地层的岩性、结构、构造等组合,以地貌以及第四系成因、沉积相和沉积物物源为指标,结合已有区域第四纪研究成果以及年代地层和岩石地层划分标准,进行皖江沿江丘陵平原区“第四纪地质单元”划分,共划分出冲积-湖积平原地质单元、洪积-坡积岗地地质单元和残积-剥蚀丘陵地质单元3个一级地质单元,总结了7种类型第四纪地层结构组合及其特征,为区域水文地质和工程地质调查与研究奠定了基础。  相似文献   

Analysis on the law of occurrence of shallow geothermal energy in Zhoukou City of Henan Province,China     

XING Hui  DI Yan-song  YONG Yi 《地下水科学与工程》2014,7(3):282-287

In this paper, through data collection and field investigation, the development and utilization status of shallow geothermal energy in Zhoukou urban area was discussed. Based on the analysis of hydrogeological conditions, rock and soil structure characteristics and field test research, the spatial distribution characteristics of rock and soil in the study area were summarized. The study shows that Zhoukou City is located in the alluvial plain of Huanghuai, and the loose deposits of river alluvial genesis range 0-200 m. These loose deposits and groundwater stored in their pores are the main carriers of shallow geothermal energy. In the central part of the Yinghe River in the middle of the study area, the aquifer thickness is within 200 m, the particle size is coarser, the water-bearing degree and recharge capacity is better. On this basis, the paper uses AHP to evaluate the suitability of shallow geothermal energy development and utilization to guide the rational development and utilization of shallow geothermal energy resources.  相似文献