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   总被引：10，自引：2，他引：10  

吴成基  韩丽英  陶盈科  郝俊卿 《山地学报》2004,22(1):17-21

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。  相似文献   

五台山新太古代碰撞造山带的形成及构造岩片划分     

赵祯祥  杜晋锋  李营辉  汪德 《华北地质》2004,27(1):5-12

经构造—岩性—事件法的详细填图,将五台山花岗绿岩带划分为庄旺—银厂、太平沟—岩头、高凡和北台—朱家坊四个构造岩片。通过对各岩片的构造岩石组合、岩石地球化学、变形变质作用和同位素年龄的综合研究,认为五台山地区新太古代碰撞造山带具有洋壳俯冲、陆—陆碰撞造山的特点。新太古代晚期的地质事件序列为:(1)2600～2560Ma:首先在恒山、阜平两侧的大陆活动边缘沉积了富铝泥砂质岩;主伸展期形成了庄旺—银厂和北台—朱家坊岩片中的金岗库岩组大洋拉斑玄武岩;(2)2560～2530Ma:大洋消减转化为岛弧环境,形成以太平沟—岩头岩片为主体的岛弧钙碱性玄武岩,石佛、北台、光明寺等钠质花岗岩体侵位,高凡浊积岩形成;(3)2530～2510Ma:主碰撞造山事件产生一系列紧闭褶皱、冲断构造,导致各岩片相互叠置、陆—陆碰撞,峨口、王家会钙碱性花岗岩侵位,绿片岩相—角闪岩相变质;(4)2510～2500Ma:碰撞造山后纵向伸展作用,各岩片抬升,高凡浊积岩整体向南滑移,形成高凡岩片。  相似文献   

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   总被引：3，自引：2，他引：3       下载免费PDF全文

陈学忠 《地震学报》2005,27(6):605-609

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.   相似文献   

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

SHAN Xinjian  LI Jianhu  MA Chao  and LIU Jiahang State Key Laboratory of Earthquake Dynamics  Institute of Geology  China Earthquake Administration  Beijing  Taiyuan University of Technology  Taiyuan  Shanxi 《《地质学报》英文版》2005,79(1):43-52

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…  相似文献   

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     

张年生  周斌  刘广武  丁兆举  崔志春 《矿产与地质》2005,(6)

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。  相似文献   

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

Lü Guxian 《中国地质大学学报(英文版)》2004,15(2):220-223

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.  相似文献   

Distribution characteristics of SOM and nitrogen on the eastern slope of Gongga Mountain   总被引：1，自引：0，他引：1  

WANG Lin  OUYANG Hua  PENG Kui  TIAN Yuqiang  ZHANG Feng 《地理学报》2004,14(4):481-487

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.  相似文献   

螺髻山自然保护区生态旅游设计与产业化组织     

方一平  曾勇  李仕明 《山地学报》2004,(Z1)

生态旅游是当今旅游发展的重点领域。生态旅游组织是研究相互关系的调控,营造生态旅游开发的产前一产中一产后组织环节的链接条件和外部环境,指导区域旅游健康发展和决策。结合实际案例,从宏观和微观两个层次上,重点分析了生态旅游开发的景观分区、总体思路、项目组织、拳头产品选择、生态旅游示范村设计和环境保育等组织程序,提出了保护区生态旅游组织的重点方向和宏观调控的市场运作方式。  相似文献   

祁连山区夏季总云量的气候变化与异常研究   总被引：3，自引：1，他引：3  

陈少勇董安祥  王丽萍孙秉强 《南京气象学院学报》2005,28(5):617-625

利用祁连山区周围34个测站的1961-2000年6—8月总云量资料，采用EOF、REOF、谱分析等方法，分析了40a来祁连山附近夏季总云量的空间异常特征和时间变化规律。结果表明：EOF的前3个主成分的累积方差占总方差的78％左右，可以较好地反映夏季总云量整体异常结构，即主体一致型、东南和西北变化相反型、东北和西南变化相反型。REOF的前3个主成分的累积方差占总方差的74％左右，前3个载荷向量场可以较好地代表夏季总云量的3个主要异常敏感区：祁连高原区、祁连东南区，河西走廊东部区，其相应的代表站是野牛沟、永登和民勤站。用代表站的资料分析3个异常区总云量的时间变化，其演变具有不同的趋势，但有相同的20a和10a周期。  相似文献   

Identifying insect infestation hot spots: an approach using conditional spatial randomization     

Trisalyn Nelson  Barry Boots 《Journal of Geographical Systems》2005,7(3-4):291-311

Epidemic populations of mountain pine beetle highlight the need to understand landscape scale spatial patterns of infestation. The observed infestation patterns were explored using a randomization procedure conditioned on the probability of forest risk to beetle attack. Four randomization algorithms reflecting different representations of the data and beetle processes were investigated. Local test statistics computed from raster representations of surfaces of kernel density estimates of infestation intensity were used to identify locations where infestation values were significantly higher than expected by chance (hot spots). The investigation of landscape characteristics associated with hot spots suggests factors that may contribute to high observed infestations.  相似文献