碱性沉积环境下碎屑岩的成岩演化——以山东东营凹陷陡坡带沙河街组四段为例   总被引：3，自引：0，他引：3  

谭先锋  田景春  李祖兵  张守鹏  王伟庆 《地质通报》2010,29(4):535-543

通过铸体薄片、扫描电镜、镜质体反射率、X衍射、地球化学等分析,对东营凹陷陡坡带沙河街组四段砂岩储层的成岩演化过程进行了系统研究。研究结果表明:沙四段原始沉积环境为碱性盐湖环境,岩石中普遍含钙质和泥质;成岩演化主要受碱性原始沉积环境、层序发育、构造作用、粘土矿物转化、有机质热演化提供的酸性流体等因素的控制,先后发生了原生隐晶方解石胶结→早期绿泥石胶结→石英溶解→长石溶解→石英Ⅱ加大→石英Ⅲ加大→铁碳酸盐胶结→石英及方解石脉充填,后期成岩裂缝比较发育。证实东营凹陷沙四段储层早期主要受碱性水介质的影响,发生了原生隐晶方解石胶结、石英溶解、长石加大等碱性成岩作用;后期受酸性流体的影响,发生了石英次生加大、长石溶蚀、方解石溶蚀等成岩作用。  相似文献   

Experimental study on supercritical phenomena of WO<Subscript>3</Subscript> solubility in NaCl-H<Subscript>2</Subscript>O system   总被引：1，自引：0，他引：1  

Qingjie?GongEmail author  Kuang?Cen  Chongwen?Yu 《中国科学D辑(英文版)》2003,46(7):664-671

The solubility measurements of WO₃ in NaCl-H₂O system with 4.0% by weight salt were carried out to study the supercritical phenomena of solubility. These experiments were carried out using rapid-quench pressure vessels, with quantitative Na₂WO₄-2H₂O, HCl, NaCl and H₂O in Pt capsule to determine the solubility of WO₃ from supersaturated solution. The pressure was kept at 34 MPa, which was near the critical pressure 31.4 MPa and the temperatures varied from 250°C to 550°C. The experimental results indicate that the solubility of WO₃ has the features of supercritical phenomenon in critical region and is sensitive to the change of system temperature and solvent density. The temperature and pressure in this experiment are close to those of ore-forming fluids in many tungsten deposits, so the features of supercritical geofluids can be helpful to investigating the ore-forming mechanism of tungsten deposit.  相似文献   

乌苏33号石油探井喷涌现象的调查与分析     

史杰  高小其  黄新民  王在华 《内陆地震》2006,20(1):93-96

简要介绍了新疆乌苏33号石油探井的喷涌现象及调查情况,对该探井喷涌水样的测试结果与背景资料进行了对比,根据该地区的井水温梯度数据理论计算了喷涌水深度,并对调查结果进行了分析。  相似文献   

Run-up and Inundation Pattern Developed During the Indian Ocean Tsunami of December 26, 2004 Along the Coast of Tamilnadu (India)   总被引：1，自引：0，他引：1  

J.P. Narayan  M.L. Sharma  B.K. Maheshwari 《Gondwana Research》2005,8(4):611-616

The tsunami run-up, inundation and damage pattern observed along the coast of Tamilnadu (India) during the deadliest Indian Ocean tsunami of December 26, 2004 is documented in this paper. The tsunami caused severe damage and claimed many victims in the coastal areas of eleven countries, bordering the Indian Ocean. Along the coast of Indian mainland, the damage was caused by the tsunami only. Largest tsunami run-up and inundation was observed along the coast of Nagapattinam district and was about 10–12 m and 3.0 km, respectively. The measured inundation data were strongly scattered in direct relationship to the morphology of the seashore and the tsunami run-up. Lowest tsunami run-up and inundation was measured along the coast of Thanjavur, Puddukkotai and Ramnathpuram districts of Tamilnadu in the Palk Strait. The presence of shadow of Sri Lanka, the interferences of direct/receded waves with the reflected waves from Sri Lanka and Maldive Islands and variation in the width of continental shelf were the main cause of large variation in tsunami run-up along the coast of Tamilnadu.  相似文献   

倾斜扰动与短临地震预报   总被引：10，自引：0，他引：10  

王贤仁  卢艳清 《地震研究》2002,25(1):20-24

依据丽江、云龙、云县、保山、通海等台水平摆倾斜仪原始记录图资料，发现震前均存在倾斜扰动。从震源机制，岩石力学角度出发，认为倾斜扰动其本质就是微破裂、粘滑现象，是大震前有效的前兆，这些震兆信息被不同于地震仪固有频率特性的水平摆倾斜仪记录到。把这些特征同震源区岩体紧密联系起来，探讨震前孕震体变化过程与机理和短临地震预报的有效途径。  相似文献   

石英构造矿物学   总被引：3，自引：0，他引：3  

刘劲鸿 《吉林地质》2001,20(2):29-41

石英属遍在性矿物，它在各种构造中常出现特殊的构造矿物学现象，这对于正确判断构造性质，构造几何学和构造动力学都有极好的效果。该文是作者多年科研成果和积累资料的总结。主要讨论了石英族矿物的变形，动态恢复重结晶，结构异常，化学变化和特征，识别标志，构造环境及标型意义。  相似文献   

对流层中层动能的全球性季节过渡与季节性急变     

孙继松  仇永炎 《气象学报》1994,52(1):33-39

本文利用１９８０—１９８８年ＥＣＭＷＦ全球资料，计算了５００ｈＰａ各纬度带上的纬向平均动能（Ｋｚ）、涡动动能（ＫＥ）及波数域动能（Ｋｎ，ｎ＝１，２，３，…，１０）。以此考察了南、北半球动能季节过渡的差异，并用Ｔ检验方法讨论了南、北半球以及全球各动能模态的季节性急变现象。现在工作单位：  相似文献   

Spectral characteristics of seismic events off the coast of the Levant     

Yefim Gitterman  Avi Shapira 《Geophysical Journal International》1994,116(2):485-497

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地质数据的分形结构   总被引：25，自引：1，他引：25  

孟宪国  赵鹏大 《地球科学》1991,16(2):207-212

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Experimental Observation of the Ore-Forming Fluid NaCl-H_2O System in the Earth Interior   总被引：3，自引：1，他引：2  

ZHANG Ronghua  HU Shumin Open Research Laboratory of Geochemical Kinetics  Chinese Academy of Geological Sciences  Baiwanzhuang Ro  Beijing  China 《《地质学报》英文版》1999,73(1):47-64

The NaCl-H_2O binary system is a major component of solutions coexisting with ores. Observation ofsaturated solutions of NaCl-H_2O by using the method of hydrothermal diamond anvil cell (HDAC) is a new approach tothe study of ore-forming fluids. The salinities of NaCl-H_2O solutions in experimental observation are in a range of 32-55%. The observed temperature range is 25℃-850℃, and the pressure range 1 atm-10 kb. In this temperature-pressure range, the supercritical single phase, two phases (L,V) close to the critical state and two-phased (L+V) immis-cible region were observed. And for the salinity of 35% the two phase L+V immiscible region of NaCl-H_2O solutionwas observed in a range of 253-720℃. Another temperature range, 400-817℃, was observed for the immiscible two-phased region of 50% salinity solution. In the high-temperature part of the two-phased immiscible region, the phase na-ture is very unstable. A "critical phenomenon" was observed when the heating path was very close to the critical state.It is possible to observe a 'critical phenomenon': an "explosion" occurred almost constantly at the interface between theliquid and vapour and the interface is rather obscure. A continuous transition between phases L and V could be foundin the immiscible L+V phase while heating continuously. Moreover, as the NaCl-H_2O solution was separated into liq-uid and vapour phases, static charges surrounding each vapour bubble could be seen, and these bubbles were attractedtogether by the static charges to form a special solution structure. Besides, critical states of different salinities of NaCl-H_2O were observed in order to study the properties of the fluids occurring in the rocks in the earth interior, the origin ofore-bearing fluids and the significance of supercritical fluid with respect to the ore formation. The comparison of the sa-linity data of the fluid inclusions in the minerals of ore deposits with observations of NaCl-H_2O under HDAC in theconditions of high temperatures and pressures, combined with further thermodynamic analysis of ore-formation condi-tions would explain in depth the factors determining the ore formation.  相似文献