boldmath Investigation of inter-molecular hydrogen bonding in the binary mixture (acetone + water) by concentration dependent Raman study and ab initio calculations     

欧阳顺利  吴楠楠  孙成林  刘靖尧  里佐威  高淑琴 《海洋学报(英文版)》2010,29(9)

This paper reports that vibrational spectroscopic analysis on hydrogen-bonding between acetone and water comprises both experimental Raman spectra and ab initio calculations on structures of various acetone/water complexes with changing water concentrations. The optimised geometries and wavenumbers of the neat acetone molecule and its complexes are calculated by using ab initio method at the MP2 level with 6-311+G(d,p) basis set. Changes in wavenumber position and linewidth (fullwidth at half maximum) have been explained for neat as well as binary mixtures with different mole fractions of the reference system, acetone, in terms of intermolecular hydrogen bonding. The combination of experimental Raman data with ab initio calculation leads to a better knowledge of the concentration dependent changes in the spectral features in terms of hydrogen bonding.  相似文献   

河嘉203H含硫水平气井测试工艺实践     

唐波  乔智国  陈伟  叶翠莲 《海洋地质译丛》2010,(4):103-105

河嘉203H井是川东北河坝构造嘉二高压含硫气藏部署的第一口水平井,具有埋藏深、储层压力高、腐蚀分压高、地层易漏失、水平井压井堵漏难度大的特点,通过开展工具优选、管柱结构优化设计、流程优选,并对替浆、放喷油嘴控制及压井等主要工序的施工工艺参数进行研究,形成了河坝嘉二含硫气藏水平井测试工艺技术体系,并在河嘉203H井获得成功应用。  相似文献   

Country‐rock structural fabrics as a guide to pluton emplacement depth: An example from the Hodgkinson Province,northeastern Australia     

B. K. Davis 《Australian Journal of Earth Sciences》2013,60(6):789-797

Country‐rock structures adjacent to plutons of the linear, northwest‐southeast‐trending Mt Alto Supersuite, Hodgkinson Province, northeastern Australia, are variably developed from north to south along the belt. S₃ and S₄ cleavages show close temporal relationships with pluton emplacement and are better and more widely developed around plutons in the north, whereas much weaker cleavages of the same generation are only sporadically developed to the south. Cleavage trend lines anastomose around less elongate plutons to the north but are generally truncated by more elongate plutons to the south. It is proposed that a major crustal dislocation, the Alto Fault Zone, comprises a set of subparallel structures that formed prior to granite intrusion and controlled emplacement of some plutons and their final shapes. The north‐south variation in structural relations is interpreted to reflect a corresponding variation in depth of emplacement from north to south, which resulted when post‐emplacement reactivation of the Alto Fault Zone uplifted and sinistrally displaced the northern end of the supersuite relative to the southern end. Reactivation of the fault zone after granite emplacement is supported by the truncation of some plutons.  相似文献   

Geological interpretation of a deep seismic‐reflection transect across the boundary between the Delamerian and Lachlan Orogens,in the vicinity of the Grampians,western Victoria     

R. J. Korsch  T. J. Barton  D. R. Gray  A. J. Owen  D. A. Foster 《Australian Journal of Earth Sciences》2013,60(6):1057-1075

A deep seismic‐reflection transect in western Victoria was designed to provide insights into the structural relationship between the Lachlan and the Delamerian Orogens. Three seismic lines were acquired to provide images of the subsurface from west of the Grampians Range to east of the Stawell‐Ararat Fault Zone. The boundary between the Delamerian and Lachlan Orogens is now generally considered to be the Moyston Fault. In the vicinity of the seismic survey, this fault is intruded by a near‐surface granite, but at depth the fault dips to the east, confirming recent field mapping. East of the Moyston Fault, the uppermost crust is very weakly reflective, consisting of short, non‐continuous, west‐dipping reflections. These weak reflections represent rocks of the Lachlan Orogen and are typical of the reflective character seen on other seismic images from elsewhere in the Lachlan Orogen. Within the Lachlan Orogen, the Pleasant Creek Fault is also east dipping and approximately parallel to the Moyston Fault in the plane of the seismic section. Rocks of the Delamerian Orogen in the vicinity of the seismic line occur below surficial cover to the west of the Moyston Fault. Generally, the upper crust is only weakly reflective, but subhorizontal reflections at shallow depths (up to 3 km) represent the Grampians Group. The Escondida Fault appears to stop below the Grampians Group, and has an apparent gentle dip to the east. Farther east, the Golton and Mehuse Faults are also east dipping. The middle to lower crust below the Delamerian Orogen is strongly reflective, with several major antiformal structures in the middle crust. The Moho is a slightly undulating horizon at the base of the highly reflective middle to lower crust at 11–12 s TWT (approximately 35 km depth). Tectonically, the western margin of the Lachlan Orogen has been thrust over the Delamerian Orogen for a distance of at least 25 km, and possibly over 40 km.  相似文献   

Prerift and synrift sedimentation during early fault segmentation of a Tertiary carbonate platform, Indonesia     

Moyra E. J. Wilson   《Marine and Petroleum Geology》1999,16(8):262

Eocene carbonate deposits of the Barru area, Sulawesi, Indonesia, provide a rare insight into sedimentation prior to and during propagation of normal faults to the surface. Three main successions; late prerift, latest prerift/earliest synrift and synrift, are characterised by distinctive facies associations and sequence development. Shallow water foraminiferal shoals and intervening lower energy depositional environments occurred during the late prerift in areas which latter formed footwall highs and hangingwall depocentres, respectively. During the latest prerift/earliest synrift, shallow water shelves deepened laterally into slope environments in developing hangingwall depocentres. In both these sequences, sections in developing hangingwall areas are thickest, deepen up-section and thin laterally towards growing footwall highs. Active faulting resulted in rapid drowning of hangingwall depocentres and massive reworking of material derived from collapse of the platform margin and adjacent shallow water/emergent footwall highs.Differential subsidence, controlling water depths and accommodation space, types of carbonate producers and active faulting were the main factors affecting depositional environments and facies distributions. Carbonate producers are extremely sensitive indicators of depositional water depth and energy, hence rapid lateral and vertical facies variations in the Barru area provide quantifiable insight into environmental changes prior to and during active faulting.  相似文献   

断陷盆地高原面典型岩溶洼地旱季土壤水氢氧同位素时空差异特征     

霍伟杰  蒲俊兵  李建鸿  张陶  王赛男 《中国岩溶》2019,38(3):307-317

以云南省蒙自断陷盆地东山山区典型岩溶洼地为研究区,通过野外采集土壤样品与实验室测试分析相结合的方法,运用稳定同位素技术研究旱季不同深度土壤水氢氧同位素组成,揭示区内土壤水氢氧同位素时空变化特征,为进一步研究云南断陷盆地山区土壤水分运移机制和当地农业合理利用和管理水资源提供科学依据。结果表明:(1)土壤水δD、δ18O同位素值的变化范围分别为-128.3‰~-27.6‰和-17.5‰~2.5‰,平均值分别为-96.1‰±20.7‰和-12.3‰±3.7‰,降雨转化为土壤水和水分在土壤中重新分布时发生一定程度的氢氧同位素分馏。(2)旱季两个月份土壤水氢氧同位素组成发生变化,4月份土壤水δD、δ18O同位素平均值分别为-86.3‰±23.83‰和-10.6‰±4.3‰,显著高于2月份(δD:-106.1‰±9.5‰;δ18O:-14.1‰±1.6‰)(p<0.05),主要和4月份土壤水的蒸发作用强烈有关。(3)在空间上,坡地与洼地之间土壤水氢氧同位素组成存在差异,2月份坡地与洼地之间土壤水δD、δ18O值差异显著(p<0.05),洼地土壤水δD、δ18O比坡地偏轻;4月份坡地与洼地之间土壤水δD、δ18O值差异不显著(p>0.05)。(4)土壤垂直剖面方向上土壤水δD、δ18O值随着土壤深度的增加而减小,浅层土壤水δ18O和深层土壤水δ18O存在显著差异,2月份浅层土壤水δ18O比深层土壤水δ18O偏正2.8‰,4月份浅层土壤水δ18O比深层土壤水δ18O偏正10.5‰。   相似文献   

徐家围子断陷深层火石岭组致密火山岩储层地应力分布规律研究   总被引：4，自引：4，他引：0  

毛哲  曾联波  秦龙卜  祖克威  刘国平  田鹤 《地质力学学报》2018,24(3):321-331

徐家围子断陷位于松辽盆地北部,其深层中生代火石岭组为致密火山岩气藏,天然裂缝发育,地应力分布非均质性强。结合诱导裂缝法与井径崩落法进行单井现今地应力方向分析,利用声波测井法计算现今地应力大小的纵向分布。依据火石岭组构造顶底面图、火山岩相组及断层分布特征建立非均质三维地质模型;在动、静态岩石物理参数拟合校正的基础上,结合实验测试及已有研究成果,确定不同岩相组和断层岩石物理参数,建立三维力学模型;利用Ansys有限元数值模拟软件建立火石岭组三维数学模型并进行相关运算获得三维现今地应力分布模型。计算结果表明在火石岭组地层中,水平最大主应力方向主要为东西向,应力值范围在86~110 MPa;水平最小主应力方向主要为南北向,应力值范围在67~84 MPa。分析模拟结果可知火山岩相、断层和构造起伏三者对火石岭组现今地应力分布影响较大。其中水平主应力的方向主要受断层和近火山口相分布的影响,而水平主应力的大小则是受三者综合作用。在构造低部位,近火山口相组发育处,断层上盘及断层端部皆为主应力的集中区域。依据现今地应力研究成果可为徐家围子断陷下一步开发井网部署、压裂改造方案和水平井的设计以及注水管理提供重要指导。   相似文献   

河北地震前兆台网3G网络典型故障处理     

边鹏飞  王红蕾  蒋宏毅  王莉森 《高原地震》2014,26(4):43-46

针对河北省地震局前兆观测台网3G无线网络使用过程中出现的典型故障进行了系统的分析,给出了处理方法.通过总结这些典型故障案例的排障过程,提出了一种排除故障的模型流程,为今后实际工作中台站网络维护提供参考依据.  相似文献   

东昆仑断裂带东段强震形势分析     

陈永顺  姚家骏  陈玉华 《高原地震》2014,26(3):9-13

围绕东昆仑断裂带强震构造背景及巴颜喀拉断块动力学环境,分析了1900年以来断块边界强震活动及强震周期性特征,探讨了东昆仑断裂带东段的强震危险性。  相似文献   

断层围陷波观测和应用     

孙译  赖晓玲 《震灾防御技术》2014,9(S1):581-589

断层围陷波的观测特点是利用密集的地震台阵,横跨断层布设测线。可以利用爆炸震源也可以利用余震进行观测,本文分别介绍了实际观测的例子。对大地震破裂带内部的观测,测线位置通常布设在地表破裂带明显、已开挖了地震探槽、断层陡坎出露等地震地质的典型地段。利用爆炸震源激发观测断层围陷波,震源位置应尽量选择在断层带上,震源炸药量大约500kg,测线位置与震源的距离大约5—15km。断层围陷波在新破裂带和老的断层中都能形成和传播,因此该方法可以用于大震破裂带研究,也可以用于城市活断层探测。  相似文献