时间剖面上小断层的计算机自动检测     

杨文强  钱建伟 《煤田地质与勘探》1996,24(3):46-49

煤田地震勘探一直探寻着对小断层的自动检测方法，因受各种因素的影响，至今尚无良策。本文介绍了多元地震参数的模式识别方法，并通过模型及实测资料成功地检测到１０ｍ以下小断层。  相似文献   

壤中氧测量在找矿中的意义     

陈国梁  熊先祥 《铀矿地质》1996,12(6):353-356

随着科学技术的发展，壤中氧测量已具备应用于野外找矿的基本条件。本文通过野外壤中氧测量的找矿实例，对方法的理论依据、技术基础做了简要的阐述。介绍了壤中Ｏ２测量与壤中Ｒｎ，ＣＯ２测量配合在找矿中的成功应用，并认为：以积分形式采集数据的壤中氧方法具有方便、稳定的特点。  相似文献   

A Study on Sequence Stratigraphy of Mesoproterozoic and Neoproterozoic in Southern North China Platform     

Zhou Hongrui Wang Ziqiang Cui Xinsheng Lei Zhenyu Dong Wenming 《中国地质大学学报(英文版)》1996,(1)

INTRODUCTIONThestrataofMesoprotCrozoicandNeoproterozoicaredevelopedcompletelyinthesouthpartoftheNorthetnaplatformandconsistofthreesystems,inasCendingorder,Jixiaulan,QingbaikouanandSlman.BasedonadetailedinvestigationontheolltcropandthecomprehenSiveanalysis,wediscussthecharaCterofsequencestratigraphyandthecorrelationoftheMemo--Neoproterozoicinthearea.FnThRrsor~unCrsANDPARA~unCrsMeSO--NooprotffezoicRadonalfortigraphyThesouthernpartofNorthChinaplatformherereferstotheareasincluding…  相似文献   

东秦岭松树沟蛇绿岩Sm-Nd同位素年龄的地质意义   总被引：1，自引：0，他引：1  

董云鹏  周鼎武  刘良  张旗  张宗清 《地质通报》1997,(2)

东秦岭松树沟蛇绿岩主要由变质橄榄岩和变质玄武岩组成。变玄武岩全岩ＳｍＮｄ同位素等时年龄为（１０３０±４６（２δ））Ｍａ，ＩＮｄ＝０．５１１６１±５（２δ），εＮｄ（ｔ）＝＋５．７±０．２，代表蛇绿岩中玄武岩的形成年龄。这一年龄的确定，为探讨秦岭区中晚元古代的古构造格局提供了重要的证据  相似文献   

钻孔灌注桩孔径扩大与塌孔的预防措施          下载免费PDF全文

李巨龙  董青红 《探矿工程》1997,(4):14-16

为保证桩基础工质量，节省灌注砼费用，采取了一系列相应措施预防孔径扩大和塌孔。着重介绍了有关预防措施和技术经济效果。  相似文献   

井间电阻率层析成象的平滑度约束反演     

董清华  田宪谟 《物探化探计算技术》1997,19(2):122-127

井间电阻率层析成象是一种探测地下浅部精细结构的物探方法，它主要用于解决工程地质问题。本文采用２．５－Ｄ有限元法，针对井间电阻率层析成象中的ＡＭ观测系统进行了反演成象计算。文中首先计算了灵敏度矩阵，然后给出了一种电阻率层析成象反演算法—平滑度约束反演，理论模型的计算和实际资料的处理，都证明了该算法的有效性  相似文献   

Relocation of the October 9, 1505 Earthquake with M63/4     

Dong Ruishu  Xiang Hongfa  Guo Shunmin  Ran Hongliu  and Fu ChanghongInstitute of Geology  SSB  Beijing  China Institute of Geophysics  SSB  Beijing  China 《中国地震研究》1997,(4)

There have been 12 possible locations of the earthquakes occurring in the South Yellow Sea since 1505.In this paper,the location of the earthquake that occurred in 1505 has been determined by the collection of more historical data of the influenced field,referring the isoseismal data of earthquakes with the epicentral intensityⅨ and combining geophysical field data with tectonic condition,due to its great influence on seismic safety assessment of some significant engineering.  相似文献   

格子Boltzmann方法地震波场模拟   总被引：3，自引：0，他引：3  

董桥梁  姚姚 《地球科学》1997,22(6):638-642

格子Ｂｏｌｔｚｍａｎｎ方法是细胞自动机在某些学科中的具体化和应用。它根据微观运动过程的某些基本特征建立简化的、时间和空间完全离散的动力学模型，这种模型的平行行为符合宏观的微分方程。  相似文献   

矿物纤维粉尘的表面特性及对生物活性的影响   总被引：8，自引：0，他引：8  

董发勤  万朴 《地质科技情报》1997,16(3):77-81

通过对矿物纤维粉尘对人体的危害性及对环境影响的研究，提出了一些矿物产生毒理作用过程的假说和因素判定；研究了矿物与生物体之间的相互作用时应重视矿物表面－细胞物理化学作用，并依据初步试验提出表面特征是矿物纤维表征生物活性的关键因子（如表面活性域、催化作用等），而纤维性只是矿物表面特性的表征因素之一。  相似文献   

Geochemistry of Brines from Salt Ore Deposits in Western Tarim Basin   总被引：2，自引：0，他引：2  

马万栋  马海州  谭红兵  董亚萍  张西营  孙国芳 《中国地球化学学报》2004,23(3):238-244

In the geological evolution of the Tarim Basin, many transgressions and relictions happened. So there have been plentiful sources of salt. Moreover, because of uttermost drought, a lot of salt has been deposited. It is possible to find potash salt in this area. In our fieldwork, we have found salt and brine in western Tarim Basin. Based on a geological survey and the characteristics of sedimentary facies and paleogeography, this paper deals with the geochemical parameters and discusses the possibility of formation of potash salt in terms of the chemical analyses of samples collected from western Tarim Basin. Results of brine analysis lead to some conclusions: most of these salt brines have eluviated from very thick halite beds, mainly chloridetype salt and this kind of halite does not reach the stage of potash deposition in all aspects; WKSL (Wukeshalu) occupies a noticeable place, and we should attach importance to this district because there have been some indicators of the occurrence of potash deposits as viewed from the contents of Br and K. Finally, low Br contents are recognized in the Tarim Basin as a result of salt aggradation, and this point of view has been proved by the results of this experiment and the data available. It cannot depend upon the index of Br to judge the evolution stage of halite. We must look for other facies of potash except marine facies.  相似文献