有关科里奥利力效应与昆仑山口西8.1级地震余震活动趋势的讨论s

根据物理学中的科里奥利力定义和计算原理，在对中国大陆20次7.5级以上特大地震余震强度与科里奥利力效应关系的统计研究基础上，重点对2001年11月14日昆仑山口西8.1级地震时所受到的科里奥利力情况进行了研究，并以此来讨论该地震后期的余震活动趋势．结果表明: ① 利用科里奥利力效应预测中国大陆特大地震的余震强度是一个有效的方法．对于左旋走滑断层和上盘错动方向通过震源子午面右侧（向北看）的逆断层，其科里奥利力效应是使断层两盘相互拉离，它降低了断层错动时断层面上的摩擦阻力，地震能量主要在主震时充分释放，故余震强度小；对于右旋走滑断层，其科里奥利力效应是使断层两盘相互挤压，它增加了断层错动时断层面上的摩擦阻力，不利于主震能量的充分释放，所以余震强度大；② 2001年11月14日昆仑山口西8.1级地震的发震断层错动以左旋走滑为主，受到的科里奥利力使断层两盘相互拉离，大小约为0.06 MPa．经过类比分析后认为，该地震后期的余震活动水平不会太高，整个序列的最大余震震级估计为6级左右．      

绿山设计软件在三维地震勘探中的应用

绿山设计软件是三维地震勘探野外观测系统的设计软件,其依据测区的地质、地球物理参数以及地理条件,可以生成多种符合要求的观测系统。考虑各种参数的相互制约及相互影响因素,根据东欢坨三维地震勘探项目的要求,利用绿山设计软件,求证了各种参数的设计流程及控制方法,布设特殊的观测系统,达到了勘探目的。     

南秦岭大巴山区河流、泉水、井水的含硒量及其分布规律

地处南秦岭大巴山地区的紫阳县是我国著名的富硒区。通过对南秦岭大巴山区几条主要河流、泉水、井水的含硒量及其分布区地层和岩石的含硒量及其相关关系分析，结果表明大巴山地区河流、泉水、井水的含硒量与含水层及其流域分布的岩石特征、岩石的含硒量及其硒的淋失率等密切相关。其河流、泉水、井水的含硒量为0.05-15μg/L。其中泉水的含硒量为0.1-1.9μg/L，井水的含硒量为0.05-15μg/L，河流的含硒量为0.3-0.7μg/L。本区含硒量最高的水体为下寒武统鲁家坪组碳质板岩分布区汇水侧的井水，其含量为2-15μg/L。富硒而淋失率低、但淋失量高的下寒武统鲁家坪组分布区的井水的含硒量高，是今后大巴山紫阳县潜在富硒矿泉水的寻找和开发的方向。含硒量低的志留纪砂岩和粉砂岩、奥陶纪白云岩、白云质灰岩以及中、晚塞武世灰岩和砾屑灰岩分布区的泉水和井水的含硒量低。     

连云山上石含锂铍钽铌矿床地质特征及找矿前景

连云山上石含锂铍钽铌矿床位于连云山背斜南翼上石伟晶岩密集区，其地层为板溪群二云母片岩．矿体受剪切节理控制，与燕山期花岗岩有密切联系．矿区合锂铍钽铌矿体主要有3条，规模、品位较为可观．工业有用矿物主要为但铌铁矿、锂辉石、绿柱石等．矿体类型为伟晶岩型，成因为岩浆交代作用形成．另外连云山地区具多个伟晶岩密集区，具良好的稀有金属找矿前景．     

基于地质遗迹保护利用的国家地质公园协调性运作--以翠华山山崩景观国家地质公园为例

根据我国国家地质公园建设中出现的若干问题，结合翠华山国家地质公园的运作实践，提出国家地质公园的主要任务是在保护好地质遗迹资源的前提下，发挥地质遗迹资源的多种功能，坚持“保护与利用相结合，保护第一，利用第二，在保护中利用，以利用促保护”的地质公园建设原则；分析了保护与利用、主景与配景、科普宣传中的科学性与通俗性、地质遗迹景观与生态环境等需要协调的七大问题，分别提出了切实可行的协调措施。     

2001年昆仑山口西8.1级大地震前后震源区应力水平估计a

提出了估计地震前后震源区应力水平的方法. 以2001年昆仑山口西8.1级地震为例， 估算了地震前后震源区的应力水平. 结果表明:地震前震源区的应力值为6.3~8 MPa；地震发生后，震源区的应力值为5~6.7 MPa. 震后震源区的应力仅下降了20%左右.      

Analysis of Remote Sensing Images of Ground Ruptures Resulting from the Kunlun Mountain Pass Earthquake in 2001

1 IntroductionOn November 14, 2001, a large earthquake of M-8.1(magnitude of 8.1) occurred to the west of the KunlunMountain Pass which bounds Xinjiang Uygur AutonomousRegion and Qinghai Province. The Chinese seismicnetwork measured the epicenter of this event to be locatedat 36.2°N, 90.9°E, 350 km away from Golmud City ofQinghai and 400 km from Ruoqiang County of Xinjiang.This is the largest earthquake in the Chinese mainland sincethe M-8.0 earthquake occurring in Damxung of Tibet…     

1∶5万岩屑地球化学普查工作方法及应用效果——以新疆东天山康古尔地区为例

在东天山特殊景观地球化学条件下,采用特定粒级(2~10mm)、多点采样(采样点距内等距、等量筛取五处残积岩屑)的方法,开展了康古尔区1∶5万岩屑地球化学普查,相继在C 3、J2-4、J5异常内发现了铜、金、银等地表矿(化)体,显示出该方法在东天山戈壁荒漠特殊景观区普查找矿中良好的找矿效果。     

Primary Deformation Analyses of High Pressure Metamorphic Rock in Western Dabie Mountain Area

In the western Dabie Mountain area, the eclogites have similar compositions and tectonic environment, which could be contrastively researched. Except for the reservation of the early structural deformation inside and outside of the eclogite lens, there is no obvious difference between the characteristics of the foliation and lineation in the eclogite lens from the one in surroumding region. So this paper concludes that the eclogites or blueschists (high pressure metamorphic rocks, i. e. HPM) are basically situated in the original position. The eclogites are mostly superposed by the ductile shear zone and show the feature of structural displacement, but so far we have not discovered any large-scale structural zone to uplift eclogite return. Based on the analyses of finite strain measure, petrofabric analysis and TEM image for some minerals such as quartz and garnet, we could efficiently know the deforming characteristics of the eclogite in the prophase and anaphase of the main deforming epoch, and finally determine the forming condition of eclogite according to the strain and the differential stress. This paper puts forward preliminary conclusion that some HPM rocks could be formed by the deep-layer embedding and local stress concentration in the process of regional metamorphism.     

Distribution characteristics of SOM and nitrogen on the eastern slope of Gongga Mountain

The distribution of soil organic matter (SOM) and nitrogen on Gongga Mountain was studied in this paper. The results showed that the content of SOM and nitrogen (N) of A horizon had an ascending trend with the increase of the elevation. The vegetation types distributed higher than the mixed broad-leaved and coniferous forest have the irregular trends. In the transitional zone vegetation such as mixed trees and treeline, the content of SOM and N is higher than other vegetation types. The distribution of SOM and N of A horizon is dependent on the synthetic effect of climate and vegetation types. The vertical distribution of SOM and N in soil profiles has the similar trends for all kinds of vegetation types, i.e., the content of A horizon is higher than that of the B and C horizons, which is the same to the distribution of dead animal and plant in soil. The soil C:N is between 7 and 25, which is relatively low comparing to the appropriate C:N of 25-30. The ratio of soil carbon to nitrogen (C:N) increases with the increase of the elevation, but its vertical distribution in soil horizons varies with different vegetation types. The N exists in SOM mainly in the form of organic nitrogen, and the soil C:N correlates significantly with SOM.