伊利石层间钾释放的远红外光谱研究   总被引：1，自引：0，他引：1  

刘耘 《矿物学报》1996,16(4):340-348

本文介绍了新近研究层间交换的远红外方法，并用该方法研究了金砂伊早石层间交换的性质，随着温度的升高，伊利石的远红外谱段从１０８ｃｍ＾－１向低波数方向偏移，３００Ｃ时为１０７ｃｍ＾－１，５００℃时为１０００ｃｍ＾－１，７００℃时为９８ｃｍ＾－１，同时，伊利石的释钾程度也伴随着增加，远红外谱同释放钾的能力有一清楚对比，因此可以用远红外方法预言伊利石释钾的能力，最后，利用量子化学计算的ＰＭ３方法首次从理论  相似文献   

The Best Natural Boundary:a New Concept Developed by Combining the Sequence Boundary with the GSSP     

Mei Shilong China U niversity of Geosciences  Beijing 《《地质学报》英文版》1996,70(1):98-107

Through a detailed study of sequence boundaries, it is concluded that sequence stratigraphy is an independent regional and transitional stratigraphic system between local lithostratigraphy and global chronostratigraphy. Therefore, a new tripartite stratigraphic classification scheme has been proposed. By combining organically the concept of sequence boundaries with the GSSP, it is suggested that the GSSP should be chosen in a conformale portion of a related sequence boundary, and the boundary established in light of this concept is defined as the Best Natural Boundary (BNB). The definition of the BNB points out the working area and stratigraphic level for the GSSP. By referring to a case study of the Permian Guadalupian/Lopingian boundary, the concept of the BNB has been elaborated in detail, and it is proposed that the BNB of the Guadalupian and the Lopingian lies between the Mesogondolella granti Zone and the Ctarkina postbitteri Zone, which is also the sequence chronostratigraphic boundary between th  相似文献   

试谈超大型铀矿床分类及找矿问题     

胡绍康 《铀矿地质》1996,12(6):331-335

随着核电事业在我国的发展，对铀资源保证的要求将越来越迫切。这里所指的铀资源保证应包含数量和效益两层意思，而超大型铀矿床则能同时满足对这两方面的要求。因此，在我国寻找超大型铀矿床是一项刻不容缓的任务。为了确立找矿目标，作者尝试提出了一种将矿床产出地质特征和经济效益相结合的超大型铀矿床分类方案，共划分出３大类１３个亚类。结合我国情况，作者认为在７个有远景的类型中，有３个（即Ⅰ－２、Ⅱ－１和Ⅲ－５）在我国最有突破的希望，特别是Ⅲ－５。最后，作者参考国外超大型铀矿床的找矿经验，对于加强我国对超大型铀矿床的探索提出了四点具体意见。  相似文献   

三维溶质运移问题的分步广义迎风解法     

姚磊华 《吉林大学学报(地球科学版)》1997,(4)

对对流占优的三维溶质运移问题提出了分步广义迎风解法，首先利用Ｎ．Ｎ．Ｙａ－ｎｅｎｋｏ对水动力弥散方程分步求解的思想，将原来的一个定解问题分解为两个定解问题即对流定解问题和扩散定解问题，对对流定解问题采用广义迎风对偶单元均衡法求解，对扩散定解问题采用一般的Ｇａｌｅｒｋｉｎ有限元法求解，不仅避免了用一般有限元法和有限差分法求解对流占优的地下水水质数学模型时常出现数值弥散和过量问题，而且避免了求节点速度这一步，节省运算步骤，对井点的浓度变化给出了更合适的求解方法。  相似文献   

Seismic data compression based on integer wavelet transform     

王喜珍  滕云田  高孟潭  姜慧 《地震学报(英文版)》2004,17(Z1)

Introduction With the development of the seismological observation technique and deep-going of seismicdata application fields, especially the digitization of data in earthquake station networks, theimprovement of the precision, the data quantity increases as geometric order, which bringdifficulty to saving and transfering these data. To keep all information, seismic data, like medicalimages, should be compressed without error in many applications. In generally, traditionalcompression meth…  相似文献   

21层大气环流模式IAP AGCM-III的设计及气候数值模拟I.动力框架     

左瑞亭  张铭  张东凌  王爱慧  曾庆存 《大气科学》2004,(5)

设计了IAP (InstituteofAtmosphericPhysics,ChineseAcademyofSciences)AGCM III,对其动力框架作说明和检验 ,时间积分采用改进的非线性迭代法。用Rossby Haurwitz波对框架进行了波型检验、能量检验和波速检验。结果表明 ,非线性迭代 3次的时间积分方案具有较好的稳定性 ,能够有效地抑制短波 ,同时对长波的歪曲较小 ,且时间积分步长可放得较大 ;该框架能够较长时间地保持Rossby Haurwitz 4波波型 ,在积分过程中能够较高精度地保持总有效能量守恒 ;模式计算的Rossby Haurwitz波速为每天西传 1 5个经度 ,这与理伦值很接近。  相似文献   

Laboratory and case studies of thermal cycling and stored strain on the stability of selected marbles     

John M. Logan 《Environmental Geology》2004,46(3-4):456-467

Studies of marble panels from the exterior of two buildings document the processes leading to bowing of the material. Bowing of panels is most extensive in those areas that are exposed to direct or reflected thermal energy. The thermal anisotropic behavior of calcite results in grain-boundary separation, grain sliding and microfracturing. The resulting loss of strength is one factor leading to bowing. The development of bows further reduces the panel strength as the outer portions elongate by inelastic deformation mechanisms. Laboratory experiments cycling marble samples for over 200 cycles at three temperatures up to 107°C above room conditions show similar strength losses as the natural situation. The second factor contributing to the bowing process is the release of residual elastic strain. The strain is in part stored in the marble from its geologic history, but may also be accumulated during thermal cycling due to the properties of calcite. Marble panels have been found to bow when stored outside, but not attached to any framework, indicating that the release of residual strain is a critical factor in producing the bows.  相似文献   

A Finite Volume Scheme for the Transport of Radionucleides in Porous Media     

E. Chénier  R. Eymard  X. Nicolas 《Computational Geosciences》2004,8(2):163-172

The COUPLEX1 Test case (Bourgeat et al., 2003) is devoted to the comparison of numerical schemes on a convection–diffusion–reaction problem. We first show that the results of the simulation can be mainly predicted by a simple analysis of the data. A finite volume scheme, with three different treatments of the convective term, is then shown to deliver accurate and stable results under a low computational cost.  相似文献   

楼层上钻孔灌注桩施工方案可行性分析          下载免费PDF全文

骆嘉成  张海鋆 《探矿工程》2004,31(8):19-20

文华大厦因设计变更，需在已施工的楼层上施工钻孔灌注桩，通过对主要受力部分AB梁进行力学分析，以及对其进行加固，解决了楼层上钻孔灌注桩施工难题。  相似文献   

Characteristics of Energy Accumulation and Release of Seismogenic Tectonics and Seismic Risk Analysis in Some Areas in the Tianshan Mountains, Xinjiang1     

Shen Jun 《中国地震研究》2005,19(1):1-11

INTRODUCTIONHowtocombinethestudyofseismogenictectonicswithearthquakepredictionisanurgentscientificdifficulty .Thereexistbiggapsbetweenstudymethodsandcurrentknowledgeonseismogenitectonics ,earthquakeprediction ,seismogenesisandthephysicsofearthquakeoccurre…  相似文献