Multivariate analysis of .uorescence and source identi. cation of dissolved organic matter in Jiaozhou Bay, China     

JIANG Fenghu  YANG Baijuan  LEE Frank Sen-Chun.  WANG Xiaoru  CAO Xuan 《海洋学报(英文版)》2009,(2):60-72

Hierarchical clustering analysis and principal component analysis (PCA) methods were used to assess the similarities and dissimilarities of the entire Excitation-emission matrix spectroscopy (EEMs) data sets of samples collected from Jiaozhou Bay, China. The results demonstrate that multivariate analysis facilitates the complex data treatment and spectral sorting processes, and also enhances the probability to reveal otherwise hidden information concerning the chemical characteristics of the dissolved organic matter (DOM). The distribution of di.erent water samples as revealed by multivariate results has been used to track the movement of DOM material in the study area, and the interpretation is supported by the results obtained from the numerical simulation model of substance tracing technique, which show that the substance discharged by Haibo River can be distributed in Jiaozhou Bay.  相似文献   

Seismic characteristics near the epicenter of the 1303 Hongtong M=8 earthquake, Shanxi Province and its implication     

WANG  Jian 《地震学报(英文版)》2004,17(4):381-388

In this paper, we calculated the seismic pattern of instrumental recorded small and moderate earthquakes near the epicenter of the 1303 Hongtong M=8 earthquake, Shanxi Province. According to the spatial distribution of small and moderate earthquakes, 6 seismic dense zones are delineated. Temporal distribution of ML≥2 earthquakes since 1970 in each seismic dense zone has been analyzed. Based on temporal distribution characteristics and historical earthquake activity, three types of seismicities are proposed. The relationship between seismic types and crustal medium is analyzed. The mechanism of three types is discussed. Finity of strong earthquake recurrence is proposed. Seismic hazard in mid-long term and diversity of earthquake disaster in Shanxi seismic belt are discussed.  相似文献   

K-Ar Dating of Fault Gouges from the Red River Fault Zone of Vietnam   总被引：1，自引：0，他引：1  

BUI Hoang B  NGO Xuan Thanh  Yungoo SONG  Tetsumaru ITAYA  Koshi YAGI  KHUONG The Hung  NGUYEN Tien Dung 《《地质学报》英文版》2016,90(5):1653-1663

Constraining the timing of fault zone formation is fundamentally important in terms of geotectonics to understand structural evolution and brittle fault processes.This paper presents the first authigenic illite K-Ar age data from fault gouge samples collected from the Red River Shear Zone at Lao Cai province,Vietnam.The fault gouge samples were separated into three grain-size fractions(0.1 μm,0.1-0.4 μm and 0.4-1.0 μm).The results show that the K-Ar age values decrease from coarser to finer grain fractions(24.1 to 19.2 Ma),suggesting enrichment in finer fraction of morerecently grown authigenic illites.The timing of the fault movement are the lower intercept ages at 0%detrital illite(19.2 ± 0.92 Ma and 19.4 ± 0.49 Ma).In combination with previous geochronological data,this result indicates that the metamorphism of the Day Nui Con Voi(DNCV) metamorphic complex took place before ca.26.8 Ma.At about 26.8 Ma-25 Ma,the fault strongly acted to cause the rapid exhumation of the rocks along the Red River-Ailoa Shan Fault Zone(RR-ASFZ).During brittle deformation,the DNCV slowly uplifted,implying weak movement of the fault.This brittle deformation might have lasted for ca.5 Ma.  相似文献   

Rapid Climatic Change during Past 60 ka Recorded in NE Indian Ocean and Its Correspondence from South China Land     

Fang Nianqiao Chen Xuefang Hu Chaoyong Yin Yong Ding Xuan Zhang Shihong Nie Haogang Institute of Marine Geology  Geophysics  China University of Geosciences  Beijing  China 《中国地质大学学报(英文版)》2000,11(3)

INTRODUCTIONSituated in the low latitudes and the extension of theWest Pacific Worm Pool,the Bay of Bengal and its neighbor-ing waterhosted a greatdeal of terrigenous sedim ents denudedfrom the Tibetan plateau and transported by the Gange-Brahmapoutra fluvial system . Although most parts of the seafloor in the area are occupied by the Bengal deep sea fan,thegreatest turbidite body in the world,turbidity current sedi-mentation does not serve as the only one dynamics to consti-tute the s…  相似文献   

Ore-forming Fluids and Ore Genesis in the World-class Mesozoic Gold Province, Jiaodong Peninsula, Eastern China   总被引：1，自引：0，他引：1  

FAN Hongrui  HU Fangfang  YANG Kuifeng  WEN Bojie  LIU Xuan 《地质学报》2014,88(Z2):1089-1091

Please refer to the attachment(s) for more details.  相似文献   

Fluid Inclusion Study of the Yejiwei Cu-Sn Porphyry Deposit in Hunan Province     

YUAN Yabin  YUAN Shun  LIU Xiaofei  Xuan Yisa 《地质学报》2014,88(Z2):1195-1196

Please refer to the attachment(s) for more details.  相似文献   

越南红河水下三角洲北区表层沉积物类型及分布特征初探     

宋兵  李珍  李杰  李贞  Xuan Phong Dang  Eiji Matsumoto 《海洋通报》2009,28(6)

对2007年采自越南红河水下三角洲北区24个表层沉积物样品进行了粒度分析和粒度参数计算,初步探讨了该区沉积物的主要类型及分布特征。结果表明,越南红河水下三角洲北区的表层沉积物主要由粉砂组成(体积平均含量为54.35%),平均粒径为6φ。按Link沉积物命名法,该区沉积物主要类型有砂、砂质粉砂和黏土质粉砂。水平分布上,由西部的砂向东逐渐变为黏土质粉砂,呈现出由近岸三角洲前缘相的粗粒级沉积物逐渐向前三角洲-浅海相的细粒级沉积物变化的趋势。与前人研究成果对比发现,红河水下三角洲北区沉积物黏土的比例较1996年的比例明显增大,可能与海岸线近10a来总体上呈向陆迁移、水下三角洲沉积向岸蚀退以及纵向上水动力逐渐变弱有关。  相似文献