Rupture process of November 6,1988,Lan-cang-Gengma,Yunnan,China,earthquake of M_s=7.6 using empirical Green’s function de-convolution method     

吴忠良  陈运泰 《地震学报(英文版)》1998,(1)

ＲｕｐｔｕｒｅｐｒｏｃｅｓｏｆＮｏｖｅｍｂｅｒ６,１９８８,ＬａｎｃａｎｇＧｅｎｇｍａ,Ｙｕｎｎａｎ,Ｃｈｉｎａ,ｅａｒｔｈｑｕａｋｅｏｆＭｓ＝７．６ｕｓｉｎｇｅｍｐｉｒｉｃａｌＧｒｅｎ’ｓｆｕｎｃｔｉｏｎｄｅｃｏｎｖｏｌｕｔｉｏｎｍｅｔｈｏｄ...  相似文献   

An analysis of anomalous weather and cli mate around the M S= 6.2 earthquake of Zhangbei region     

QING SEN LI ) YU MEI JIN ) ZHI CHENG MIAO ) WEN ZHONG JIA ) GUI CAI JIANG ) ) Zhangjiakou Meteorological Observatory of Hebei Province  Zhangjiakou  China ) Forth Middle School of Zhangjiakou 《地震学报(英文版)》1998,(6)

ＩｎｔｒｏｄｕｃｔｉｏｎＡｔｅｉｇｈｔｔｏｔｗｅｌｖｅｏ′ｃｌｏｃｋｏｎＪａｎｕａｒｙ１０,１９９８,ｔｈｅｒｅｏｃｃｕｒｅｄａｓｔｒｏｎｇｅａｒｔｈｑｕａｋｅｏｆＭＳ＝６．２ａｔＺｈａｎｇｂｅｉＣｏｕｎｔｙｉｎｔｈｅｎｏｒｔｈｗｅｓｔｅｒｎｐａｒ...  相似文献   

PREDICTION OF IMPACT OF THE THREE GORGES PROJECT ON ESTUARY BEACH OF THE YANGTZE RIVER   总被引：1，自引：0，他引：1  

Weibing FENG  Yigang WANG  Xiucheng ZHONG 《国际泥沙研究》1998,(1)

ＰＲＥＤＩＣＴＩＯＮＯＦＩＭＰＡＣＴＯＦＴＨＥＴＨＲＥＥＧＯＲＧＥＳＰＲＯＪＥＣＴＯＮＥＳＴＵＡＲＹＢＥＡＣＨＯＦＴＨＥＹＡＮＧＴＺＥＲＩＶＥＲＷｅｉｂｉｎｇＦＥＮＧ１ＹｉｇａｎｇＷＡＮＧ２ａｎｄＸｉｕｃｈｅｎｇＺＨＯＮＧ３ＡＢＳＴＲＡＣＴＡｌｔｈｏ...  相似文献   

A Tentative Apparent Polar Wander Path for the Shan-Thai-Malay Block,SW Yunnan, China     

CHEN Haihong  HAO Jie  XIAO Wenjiao  ZHONG Dalai 《Continental Dynamics》1997,(1)

1.IntroductionTheShan--Thai-MalayBlock(STMB)isadonorcontinentalfragmentintheSWborderregionofChinaandSoutheastAsia.IthaslongbeenrecognizedasablockdisplacedfromGondwanaintheLatePaleozoic(Mitchell,1981;Cao,1986).ThePaleozoicmarinesequenceandfossilassemblagesaremarkedlydifferentfromthoseofotherChineseblockssuchasYangtze,NorthChinaandTarim,aswellaseasternChineseblocks.Instead,specificsedimentaryfactessuchasEarlyPenmanglaciomarinedeposits,Carboniferouscool-coldwaterfaunaandPenmanGlossopt…  相似文献   

海洋沉积物中的微玻璃陨石   总被引：2，自引：0，他引：2       下载免费PDF全文

彭汉昌  庄世杰  于众 《地球物理学报》1985,28(5):497

本文论述了来自世界各大洋的玻璃微粒的物理特性、化学成分和微结构特征,并同玻璃陨石进行了对比。从而认为,这些玻璃微粒并非为海底火山物质,而是典型的微玻璃陨石,并指出它们有可能起源于月球火山作用。  相似文献   

柴达木盆地茫崖坳陷古近系—新近系R_o分布特征及地质意义     

钟建华  郭泽清  杨树锋  刘卫红  陈汉林  黄立功  刘云田  江波  张永庶 《地质学报》2004,78(3)

柴达木盆地西部的茫崖坳陷是青海油田的主力油气产区 ,对该区古近系—新近系镜质组反射率(Ro)进行了系统研究 ,发现其垂向分布有两种规律 :一是 Ro 与垂深有良好的线性关系 ,多分布在坳陷中央 ,反映了沉积环境、物源和构造的稳定性较好 ;二是 Ro 与垂深呈右阶状 ,反映了逆冲叠覆。此外 ,通过 EASY% Ro 方法计算了研究区地层剥蚀厚度 ,认为干柴沟—油泉子为英雄岭隆起的主轴 ,因为剥蚀了 36 0 0～ 375 0 m,所以英雄岭主峰在地形上呈现出隆起主轴的假貌。通过地层剥蚀厚度的研究 ,还发现油气田主要分布在剥蚀梯度带上。这一结论对柴达木盆地油气勘探开发具有重要意义  相似文献   

岩石圈热—流变结构与大陆动力学   总被引：11，自引：1，他引：11  

王良书  刘绍文  李成  李华  徐鸣洁  钟锴  韩用兵 《地球科学进展》2004,19(3):382-386

由于大陆内部存在上千公里宽的弥散边界变形带，板块构造理论用于解释新生代大陆内部的显著的构造变形遇到了困难。因此，探讨大陆岩石圈的构造变形机制、演化及动力学过程从而成为国际地球科学的热点研究领域---大陆动力学。大量的地震测深、地震层析成像技术的应用对岩石圈的精细结构研究，已揭示岩石圈结构和物质组成存在显著的横向非均质性。这种横向非均质性是地质时期内大陆岩石圈经历多期次构造-热事件叠加与改造所形成的。同时，也决定了岩石圈热-流变学结构的横向分块、纵向分层的特性。大陆岩石圈热-流变学结构非均质性及其构造继承性对大陆内部构造变形起控制作用。所以，大陆动力学应注重开展大陆变形的运动学、大陆岩石圈的热-流变学结构和大陆变形的地球动力学数值模拟研究。  相似文献   

利用水电站PD16硐方解石研究划分坝区岩溶发育期     

王能峰  钟国华  贾疏源  王永利 《铀矿地质》2004,20(2):120-123,128

本文在分析采集于西南某水电站PDl6硐壁裂缝中不同位置的方解石形成年代以及碳氧同位素的基础上，结合坝区具体的水文地质情况，确定了研究河段岩溶发育的时间及其演化。  相似文献   

TOC changes in the process of thermal evolution of source rock and its controls   总被引：4，自引：0，他引：4  

ZHONG Ningning  Lu Shuangfang  HUANG ZHILONG  Zhang Yousheng  XUE Haitao  PAN Changchun 《中国科学D辑(英文版)》2004,47(Z2)

Through geological observation, simulation in laboratory and numerical modeling, the factors that control the changes in total organic content (TOC) of source rock have been studied. When the formula DTOC=(TOC0-TOC)/TOC0 (original organic carbon content in the rock) is used to measure the TOC (total organic carbon content) changes in the source rock through geological time, the degrees and directions of such changes are determined by losses and relative amounts both of organic and inorganic matter in the source rock. The DTOC equation, which is used to calculate the loss rate in the process of maturation for the source rock, is therefore obtained by analyzing the mass balance relations. For a certain type of source rock with a certain maturation history, the changes of its TOC respond only to the rates of hydrocarbon generation and expulsion. In actual cases of geological entities, DTOC generally ranges from -0.05 to 0.2, while the calculated reconversion coefficient (k) for organic carbon content remains between 0.90 and 1.25. Only in an ideal situation where there are extremely high rates of hydrocarbon generation and expulsion can the DTOC value experience significant changes, with k reaching up to 2.5. It is concluded, therefore, that the criterion for carbonates source rock assessment, based on reconverting the TOC to the value of its original state, may have overestimated the course of the "carbon-reduction", which is likely in many cases to make a poor source rock sound better.  相似文献   

Study on the threshold value of organic enrichment of carbonate as gas source rocks   总被引：1，自引：0，他引：1  

XUE Haitao  Lu Shuangfang  ZHONG Ningning  WANG Bo 《中国科学D辑(英文版)》2004,47(Z2)

In this paper, calculations have been performed about gas quantity of generation, adsorption, dissolving in oil, dissolving in water, diffusion of unit area carbonate rocks at different geologic conditions in the Tarim basin. According to the material balance principle, the corresponding organic carbon content when gas started expelling from source rocks with separate phases has been worked out. We regard it as the theoretical threshold value (TOCmin) of gas source rocks under the same geologic condition. Based on the simulating calculation, a fact has been discovered that TOCmin decreases with the increasing source rocks thickness, decreases at the beginning and then increases with the increasing maturity and decreases with the better type of organic matter. TOCmin evaluation table of carbonate gas source rocks in the Tarim basin has been established. Investigations indicate that the TOCmin of carbonate gas source rocks varies greatly with the differences of geologic conditions, and gas source rocks cannot be evaluated with a unified TOC threshold value. And we also establish a preliminary evaluation table of TOC industrial threshold value, TOCgy, of carbonate gas source rocks in the Tarim basin.  相似文献