A deep seismic transect from Hovgård Ridge to northwestern Svalbard across the continental-ocean transition: A sheared margin study     

O. Ritzmann  W. Jokat  W. Czuba  A. Guterch  R. Mjelde  Y. Nishimura 《Geophysical Journal International》2004,157(2):683-702

  相似文献   

Estimation of regional material yield from coastal landslides based on historical digital terrain modelling     

C. J. Hapke 《地球表面变化过程与地形》2005,30(6):679-697

High‐resolution historical (1942) and recent (1994) digital terrain models were derived from aerial photographs along the Big Sur coastline in central California to measure the long‐term volume of material that enters the nearshore environment. During the 52‐year measurement time period, an average of 21 000 ± 3100 m³ km^?1 a^?1 of material was eroded from nine study sections distributed along the coast, with a low yield of 1000 ± 240 m³ km^?1 a^?1 and a high of 46 700 ± 7300 m³ km^?1 a^?1. The results compare well with known volumes from several deep‐seated landslides in the area and suggest that the processes by which material is delivered to the coast are episodic in nature. In addition, a number of parameters are investigated to determine what influences the substantial variation in yield along the coast. It is found that the magnitude of regional coastal landslide sediment yield is primarily related to the physical strength of the slope‐forming material. Coastal Highway 1 runs along the lower portion of the slope along this stretch of coastline, and winter storms frequently damage the highway. The California Department of Transportation is responsible for maintaining this scenic highway while minimizing the impacts to the coastal ecosystems that are part of the Monterey Bay National Marine Sanctuary. This study provides environmental managers with critical background data on the volumes of material that historically enter the nearshore from landslides, as well as demonstrating the application of deriving historical digital terrain data to model landscape evolution. Published in 2005 by John Wiley & Sons, Ltd.  相似文献   

青西油田碳酸盐岩裂缝性储层地球物理预测技术的应用     

师永民撒利明  陈广城田鑫李虹  王斌婷 《应用地球物理》2005,2(2):119-126

白云岩成岩收缩晶间孔、洞、缝与构造网状缝相互沟通可以组成良好的油气储层，但是这种复杂裂缝—孔隙型储层分布随机性强、发育程度和差异性大，储层预测难度大。本文以中国西部酒泉盆地青西油田下白垩统下沟组湖相白云岩裂缝—孔隙型储层为例，提出地球物理综合预测碳酸盐岩裂缝的方法。本文描述了综合地球物理方法预测碳酸盐岩裂缝储层的实施和应用效果。  相似文献   

河南桐柏围山城金银成矿带矿床地球化学特征   总被引：1，自引：0，他引：1  

徐友灵 《华南地质与矿产》2005,(4):1-10

根据对围山城金银成矿带的成矿元素、黄铁矿微量元素标型特征、成矿流体地球化学特征、稀土元素、硫铅同位素和氢氧同位素特征的研究,提出矿带中的初始成矿物质主要来源下地壳和上地幔,由海底火山喷流作用形成。各工业矿体的形成与后期叠加构造和热流体的改造作用密切相关。  相似文献   

在卸荷产生拉剪情况下裂隙岩体的力学行为     

吴汉辉  杨转运  刘会 《岩土工程技术》2005,19(5):237-240

据岩体在卸荷情况下的拉剪应力状态,确定了节理岩体的线弹性断裂力学模型。依照此模型,可以得到相对远离裂隙(该位置的点到裂隙中心的距离比裂缝长度大)且受裂隙影响区域内应力、应变和变形方程。这些对评估裂隙岩石变形有重要的参考意义。通过用理论方程的计算结果和卸荷情况下试验观测所得的数据对比,证明该模型应用于实际工程中具有可行性。  相似文献   

Study on the multi-sources of ore-forming materials and ore-forming fluids in the Huize lead-zinc ore deposit     

张振亮  黄智龙管涛严再飞  高德荣 《中国地球化学学报》2005,24(3):243-252

TheHuizelarge sizedPb ZndepositinYunnan ProvinceislocatedinthecenteroftheSichuan Yun nan GuizhouPb Zn Agpolymetalmineralizationzone(SYGPb ZnMMD)inwesternYangtzePlateandis oneofthefamousPb Zn GebasesinChina(Wang Jiangzhenetal.,2003;WangXiaochunetal.,2000).Thisdeposit,whichischaracterizedbylarge scale(Pb+Znmetallicreservesarehigherthan5mil liontons),highPb+Zngrade(thePb+Zngradesof mostoresare25%-35%),highabundanceofuseful associatedelements(Ag,Ge,Cd,Ga,etc.)and someimportantbreakt…  相似文献   

Estimate of differential stress in the upper crust from variations in topography and strike along the San Andreas fault   总被引：3，自引：0，他引：3  

Yuri Fialko  Luis Rivera  Hiroo Kanamori 《Geophysical Journal International》2005,160(2):527-532

  相似文献   

电子探针化学测年技术及其在地学中的应用   总被引：2，自引：0，他引：2  

郭国林潘家永  刘成东郭福生 《华东地质学院学报》2005,28(1):39-42

电子探针主要应用于固体无机材料的微区化学成分定量测定和表面形貌研究。近十年来电子探针化学测年技术发展迅速，并取得了丰富的研究成果。本文在简单介绍该技术发展历程后，进一步详细介绍该技术的基本原理、样品制备与分析、年龄计算方法等内容，最后讨论了该技术的优缺点，同时指出电子探针测年技术在地学中的具有广泛的应用前景。  相似文献   

液体高膨胀材料充填堵漏试验应用     

滕子军  赵善友 《探矿工程》2005,32(9):49-51

介绍了钻探施工中，利用膨胀材料充填、堵漏的新工艺，其具有经济、高效、安全的特点。  相似文献   

Localization of mining-induced horizontal fractures along rock layer interfaces in overburden: field measurements and prediction   总被引：3，自引：0，他引：3  

V. Palchik 《Environmental Geology》2005,48(1):68-80

The locations of mining-induced horizontal fractures along rock interfaces in the overburden of Donetsk Coal Basin were identified using an original experimental device. The device traps methane from horizontal fracture zone (100–fold coal seam thickness) over an active longwall mining excavation. Presence or absence of horizontal fractures along rock layer interfaces is correlated with physical characteristics of the overburden, such as thickness, uniaxial compressive strength of overburden rock layers, location of rock layer interfaces and thickness of extracted coal seams. As a result, a combined criterion based on these physical characteristics is proposed to predict the presence of overburden horizontal fracturing in coal mine operations.  相似文献