ON LOPINITE,A NEW TYPE OF COAL IN CHINA     

C.Y.HSIEH 《地质学报》1933,(0)

To the east of Nanchang,the capital of Kiangsi Province,there cropsout a continuous belt of Permian coal series~1 trending approximately in thedirection from N.E.to S.W.Broadly speaking,this coal belt forms a synclinal  相似文献   

ON THE OCCURRENCE OF SPHAEROSIDERITE IN A SUBBITUMINOUS COAL FROM HSIAN COAL MINE,LIAONING PROVINCE     

謝家榮 《地质学报》1933,(1)

Mr.T.F.Hou,geologist of the National Geological Survey of Chinabrought back in 1931 from Liaoning province,a specimen of subbituminous coalin which are included patches or aggregates of small oolites.This interestingspecimen was given to the writer for microscopical investigation.Both polished  相似文献   

UPPER PALAEOZOIC FORMATIONS AND FAUNAS OF YAOLING,CHENHSIEN,S.HUNAN.     

朱森 《地质学报》1928,7(1):61-84

STRATIGRAPHY Yao Ling (瑤林) lies 40 li southeast from Chen Hsien city (郴縣), about Long. 112°30′E., Lat. 25°40′N., and is halfway between Chen Hsien city and the well known wolfram mining district, Yao Kang Sien (瑤崗仙). On the  相似文献   

Extreme Enrichment of Tellurium in Deep-Sea Sediments   总被引：2，自引：0，他引：2  

LI Yanhe  WANG Yimin  SONG Hebin  and YUE Guoliang  Laboratory of Isotope Geology  Ministry of Land  Resources  Beijing  E-mail: lyh@mx.cei.gov.cn Institute of Mineral Resources  Chinese Academy of Geological Sciences  Beijing  National Geoanalysis Center  Beijing 《《地质学报》英文版》2005,79(4):547-551

Tellurium is a sort of scattered rare element on the earth. Its concentration is very low in earth＇s crust, only 1.0 ng/g. However, it has extremely high abundance in Co-rich crusts, marine polymetallic nodules, deep-sea sediments and aerolites. To find out the origin of tellurium enrichment in deep-sea sediments, we analyzed and compared tellurium concentrations and helium isotope compositions in the magnetic parts and those in the bulk parts of deep-sea sediments. The result indicates that the helium content, 3He/4He ratio and tellurium concentration are obviously higher in the magnetic parts than those in the bulk parts. The 3He abundance varies synchronously with the tellurium concentration. 3He and Te have a distinct positive correlation with each other. It is the first time that the paper brings forward that the extreme enrichment of tellurium in deep-sea sediments, like helium isotope anomalies, probably results from the input of interplanetary dust particles （IDPs）. Similarly, the extreme enrichment of tellurium in marine polymetallic nodules and Co-rich crusts is possibly related to IDPs.  相似文献   

Evidences for Incipient Hydrothermal Event(s) in the Central Indian Basin: A Review     

Sridhar D. IYER 《《地质学报》英文版》2005,79(1):77-86

1 IntroductionMetalliferous sediments and mounds occur in all majortectonic settings in the oceans (e.g., the Galapagos Rift,East Pacific Rise (EPR), Bauer Deep and Central Basin ofthe Pacific; Heath and Dymond, 1977). Further, massivesulphide deposits and high-temperature vents have beenreported along the mid-ocean ridges (MOR). In the IndianOcean, an inactive hydrothermal field and a hydrothermalplume site have been discovered along the Central IndianRidge (CIR). The SONNE Hydro…  相似文献   

日本1999年到2002年测地学与地球物理学活动报告     

郝清源  孙振凯 《国际地震动态》2005,(3):33-36

日本是测地学与地球物理学国际联合会(IUG)最开始的9个成员国之一。IUGG成立于919年,现在有66个成员国。日本测地学与地球物理学国家委员会是作为日本科学委员会180个联络委员会的一个成员而成立的,其作用是为了商讨地学的重要性,为了执行在测地学和地球物理学方面的科学研究的国际合作和协调方面的决定。  相似文献   

利用GPS监测电离层不均匀结构探讨   总被引：7，自引：0，他引：7       下载免费PDF全文

朱文耀  章红平  黄珹  金双根 《地球物理学报》2004,47(6):941-948

利用上海地区GPS综合应用网提供的高时空分辨率的双频GPS观测资料,研究了该区域内一电离层不均匀体的产生、消亡过程.首先,采用Kalman滤波的方法改善双频伪距之差的观测精度,并利用参数估计的方法计算该时段内相应的硬件延迟.再根据电离层单层模型,利用GPS双频观测量、测站位置和GPS精密星历,求出GPS信号穿刺点的坐标和垂直方向电离层的电子含量;然后内插并获取其等值线图.等值线图随时间的变化表明,受等离子体湍流的影响,2003年9月8日北京时间9时40分左右在38°N、118°E左右产生了一电离层不均匀体,其尺度大约在50km左右,生存时间大约为5min.受地球重力场和高空风场的影响,该不均匀体向东北方向扩散.然后,利用大气扩散模型,按扩散方程计算分析了该不均匀体可能发生的电离层层区.理论计算表明,该不均匀体发生在电离层扩展F区,高度在350km左右.  相似文献   

GEOMORPHIC FEATURES OF THE SHULE RIVER DRAINAGE BASIN IN QILIANSHAN AND ITS INSIGHT INTO TECTONIC IMPLICATIONS          下载免费PDF全文

SU Qi  YUAN Dao-yang  XIE Hong  SHAO Yan-xiu  LIANG Ming-jian. Lanzhou Institute of Seismology  China Earthquake Administration  Lanzhou  China  . Lanzhou National Observatory of Geophysic 《地震地质》2016,38(2):240-258

Because of the strong uplift of the Qilian Shan since late Cenozoic,the drainage basins that are derived from the mountains have undergone strong tectonic deformation.So the typical geomorphology characteristics of these drainage basins may indicate the strong tectonic movement in the region.For example,the Shule River drainage basin,which originates from the western part of the Qilian Shan owns unique geomorphology characteristics which may indicate the neotectonic movement. Stream networks of the Shule drainage basin extracted from the DEM data based on GIS spatial analysis technology are graded into five levels using Strahler classification method.Four sub-catchments,numbered 1,2,3 and 4 are chosen for detailed analysis.Furthermore,the four sub-catchments,the hypsometric integral curves,Hack profiles,SL index and average slope of the Shule drainage basin are determined by GIS tools.In addition,we analyzed the slope spectrum of the Shule drainage basin. The average elevation of the Shule drainage basin is very high,however,the slope of the drainage basin is very low,the gentle slope occupies so large area proportion that the slope spectrum shows a unimodal pattern and a peak value is in low slope region (0°~5°),so tectonic movement has a strong influence on the drainage basin.Under the intensive impact of the tectonic movement of the active fault and regional uplift,the hypsometric integral curve is sigmoid,revealing that the Shule drainage basin is in the mature stage.The Hack profile is on a convex,the longitudinal profile is best fitted by linear fitting and the abnormal data of the SL index of the Shule River has a good fit with the section through which the active fault traverses,that means the tectonic movement of the active fault has strong influence on the river's SL index.It is worth noting that lithologic factors also have great impact on the river geomorphology in some sections. According to the above analysis,we recognize that in the interior of active orogen,the evolution of river geomorphology usually is influenced by tectonic movement and reveals the regional neotectonics in turn.  相似文献   

基于均值漂移的粒子滤波算法设计及其在导航数据处理中的应用     

宫轶松  归庆明  李保利  乔书波  张灵敏 《测绘学报》2011,(Z1):120-125,132

针对标准粒子滤波算法中存在的计算量大和粒子的权值退化的缺陷,将均值漂移算法和PF算法进行融合,设计基于均值漂移搜索算法的粒子滤波新算法。该算法仍遵从粒子滤波算法的计算框架,基本原理是利用MS算法对粒子的聚类作用,将均值漂移思想融合到粒子滤波算法的重要性采样过程中,对粒子集进行确定性搜索,使每个粒子收敛于局部最优值,这样粒子的状态表示更接近真实的状态分布,因此只需较少的粒子数便可达到未嵌入MS的使用大量粒子数的粒子滤波状态估计的性能,从而在缓解粒子的权值退化的同时提高粒子滤波算法的实时性。大量的数值试验和对GPS/DR组合导航数据处理的结果验证了该方法的有效性。  相似文献   

Evaluation model of landslide hazards induced by the 2008 Wenchuan earthquake using strong motion data   总被引：1，自引：0，他引：1  

Xiuying Wang Gaozhong Nie  Mujun Ma Institute of Crustal Dynamics  China Earthquake Administration  Beijing  China Institute of Geology  Beijing  China National Earthquake Response Support Service  Beijing  China 《地震学报(英文版)》2011,(3):311-319

Landslides induced by the 2008 Wenchuan earthquake in the Longmenshan area were relatively well instrumented,which makes it possible to investigate the landslides using ground motion records.Firstly,this paper analyzes the data from Wenchuan earthquake on both regional and local site scale.The analyses show that the Newmark accumulative displacement calculated from the ground motion recorded in a particular geological hazard zone corresponds to the hazard intensity in that zone;the larger the displacemen...  相似文献