检索结果-南通市图书馆

Chinese Science Bulletin 2001年第14期46卷 1203-1205页

作者： CHEN Liang, SUN Yong, PEI xianzhi, GAO Ming, FENG Tao, ZHANG Zhongqing & CHEN Wen1. Laboratory of Continental Dynamics, northwest university, xi’an 710069, china 2. department of geology, northwest university, xi’an, 710069, china 3. Institute of geology, Chinese Academy of Geological Sciences, Beijing, 100037, china Laboratory of Continental Dynamics Northwest University Xi’an China department of geology Northwest University Xi’an China Institute of geology Chinese Academy of Geological Sciences Beijing China

Whole rock 40Ar/39Ar age dating has been conducted on a basalt sample from Dur’ngoi ophiolite, Qinghai Province, which was reported to be the northernmost pa-leo-tethyan oceanic basin in Tibet. A high temperature pla-teau age (345.3±7.9 Ma) with an isochorn age (336.6±7.1 Ma) has been obtained, representing the eruption time of oceanic crust Considering related geological settings, the new age provides constraints on the northernmost pa-leo-tethyan suture zone in Tibet and the tectonic evolution of Paleo-tethys in Northeast Tibet and adjacent areas.

关键词： Dur’ngoi ophlolite 40Ar -39Ar age Paleo-tethys.

Hydrogen isotopic characteristics and their genetic relationships for individual n-alkanes in plants and sediments from Zoigê marsh sedimentary environment

在线全文

学校读者我要写书评

暂无评论

Science china Earth Sciences 2010年第9期53卷 1329-1334页

作者： DUAN Yi1, ZHENG ChaoYang2 & WU Baoxiang1 1 Key Laboratory of Petroleum Resources Research, Institute of geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000, china 2 department of geology, northwest university, xi’an 710069, china Key Laboratory of Petroleum Resources Research Institute of Geology and Geophysics Chinese Academy of Sciences Lanzhou China department of geology Northwest University Xi’an China

To understand internal relations of their hydrogen isotopic compositions in typical marsh environment, we, using GC-IRMS analytical technique, measured the hydrogen isotopes of individual n-alkanes in the herbaceous plant, woody plant leaf, and sediments from Zoigê marsh in china. The results show significant differences in the hydrogen isotopic compositions of n-alkanes among the different kinds of plants and the different species in the same kind. δD values of n-alkanes in the herbaceous plants (from -254‰ to -184‰) are lighter than those in woody plant leaf ( from -195‰ to -142‰ ), and the hydrogen isotopic compositions of n-alkanes in K. tibetica P. are lighter than P. pratensis L. The mean δD values of n-alkanes in the sediments from Zoigê marsh reflect that they were derived from herbaceous plants, which is consistent with the peat samples being composed mainly of herbaceous plant remnants. The significant differences in hydrogen isotopic compositions of n-alkanes among the sedimentary samples are caused possibly by environment factors and the difference in input quantity of different herbaceous plants. A certain negative correlation exists between the δ13C and δD values of n-alkanes in the samples, and plant types can be distinguished using the cross plot of δD vs. δ13C values of n-alkanes in the plants. These data and recognitions provide scientific basis for hydrogen isotopic applied research of individual n-alkanes.

关键词： marsh environment plants sediments individual lipids hydrogen isotopes genetic relationship

Essential natures of Carlin-type gold mineralization in the Zhenxun Basin

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 1999年第S2期44卷 238-240页

作者： MA Jianqin~1 and ZHANG Fuxin~2 1. Institute of Geochemistry, Chinese Academy of Science, Guiyang 550002, china Present address: Highway Egineer College, xi’an Highway university, xi’an 710064, china 2. department of geology, northwest university, xi’an, 710069, china Institute of Geochemistry Chinese Academy of Science Guiyang 550002 China Highway Egineer College Xi' an Highway University Xi' an 710064 China department of geology Northwest University Xi' an 710069 China

THE Zhen’ an-Xunyang (Zhen-Xun) Basin, located in the center of the Qinling Minor Plate in the Qinling orogen, develped and evoluted from the Devonian to the Triassic. The basin and its basement aresimilar to that of the southwestern part of the Yangtze Plate, where occur rich epithermal deposits. Thebasement of the basin is composed of the Proterozoic low-grade metamorphised volcanic and sedimentaryrocks, on which weakly metamorphised sedimentary and sedimentary rocks are deposited from the Cambrian to the Triassic. There occur three kinds of epithermal metal deposits: exhative-sedimentary-reformationtype Pb-Zn deposit (such as xitonggou and Yuexi) ; reformation type Hg-Sb deposit (such as Dingjiashanand Shijiashan) ; sedimentary-reformation type Au deposit (such as Jinlongshan, Qiuling, Yaojie andJiashigou). The Au deposits are associated with minor Sb deposit. This contribution demonstrates onlythe essential natures of the epithermal gold mineralization.

关键词： Carlin type gold mineralization Zhenxun Basin.

Impact of Male Takeover on Intra-unit Sexual Interactions and Subsequent Inter-birth Interval in Wild Rhinopithecus roxellana

在线全文

学校读者我要写书评

暂无评论

Impact of Male Takeover on Intra-unit Sexual Interactions an...

野生动物生态与资源保护第四届全国学术研讨会

作者： ZHAO Da-Peng~(1,2) and LI Bao-Guo~(1*) (1 College of Life Sciences,northwest university,xi’an 710069,china) (2 department of geology,northwest university,xi’an 710069,china)

Data were collected on sexual interactions before and after a male takeover of a one male unit (OMU) of Sichuan snub-nosed monkeys(Rhinopithecus roxellana) in the Qinling Mountains, *** original unit consisted of an a...

关键词：

Hand Preference of Unimanual and Bimanual Reaching Tasks in Wild Sichuan Snub-nosed Monkeys(Rhinopithecus roxellana)

在线全文

cnki会议

学校读者我要写书评

暂无评论

Hand Preference of Unimanual and Bimanual Reaching Tasks in ...

野生动物生态与资源保护第四届全国学术研讨会

作者： ZHAO Da-Peng~(2,1) LI Bao-Guo~(1*) (1 College of Life Sciences,northwest university,xi’an 710069,china) (2 department of geology,northwest university,xi’an 710069,china)

Although captive settings offer a more controlled environment for assessing primate laterality, studies of natural or wild populations provide important insight into the evolution of limb *** preference was firstly in...

关键词：

Impacts of Commercial Logging on Rang Use of Sichuan snub-nosed monkey（Rhinopithecus roxellana）in Qinling Mountains,china

在线全文

cnki会议

学校读者我要写书评

暂无评论

Impacts of Commercial Logging on Rang Use of Sichuan snub-no...

野生动物生态与资源保护第三届全国学术研讨会

作者： GUO Songtao~(1,2) LI Baoguo~1 (1 College of Life Sciences,and Key Laboratory of Resource Biology and Biotechnology in Western china of Ministry of Education,northwest university,xi''an 710069,china 2 department of geology,northwest university,xi''an 710069,china)

＜正＞Habitat destruction is one of the greatest threats to the Sichuan snub-nosed monkey（Rhinopithecus roxellana）in *** examine the long-term impact of forest logging on the habitat use of Sichuan snub-nosed monkeys,we surveyed the range use of a troop of monkeys in Zhouzhi Nature Reserve,called the Eastern Ridge Troop（ERT）,and compared the compositions of their habitat forest before,during,and

关键词：

ANALYSIS ON GOLD AND COPPER ORE-FORMING SYSTEM WITH COLLISION OROGENY OF EASTERN TIANSHAN

在线全文

cnki会议

学校读者我要写书评

暂无评论

Geotectonica et Metallogenia 2001年第1期25卷 106-117页

作者： YANG xing ke 1,2 ,CHENG Jian jun 1,CHENG Hong bing 2,JI Jin sheng 2,CHEN Qiang 2,LUO Gui chang 2 (1. department of geology,northwest university,xi’an 710069,china 2. department of Geoscience,Chang’an university,xi’an 710054,china) department of geology Northwest UniversityXi'an710069China department of Geoscience Chang'an UniversityXi'an 710054China department of geology Northwest UniversityXi'an710069China department of Geoscience Chang ' an UniversityXi'an710054China

According to tectono stratigraphical division principle, different units in Kangguertage Huangshan collision zone, Eastern Tianshan, are divided into order and disorder two types of stratum rock associations, which belong to two kinds of different tectono volcanic activity belts. The collision ororeny and ductile shear zone have a strong space time coupling. Based on the island arc bearing volcanic rock on both sides of the collision zone, time of ore forming and rock forming, characteristics of collision granit, geochemical province, special multistage collision orogeny and intracontinental orogeny basin forming developed features have been found. Gold and copper deposits, with the relation to the collision orogeny, are divided into seven genetic types. The ten metallogenic zones are classified into two kinds of ore forming system of paleo continental margin. Metallogenesis of gold deposits can be classified into five stages. Gold and copper deposits are distributed in belts with the relation to the development of the collision orogeny. The distribution of main large scale copper deposits in the north part of the collision zone and most large middle scale gold deposits in the south part of the collision zone can direct the prospecting for gold and copper deposits. The actual targets are put forward.

关键词： Collision tectonics collision orogeny intra-continental orogeny and basin-forming ore-forming system Eastern Tianshan

在线全文

学校读者我要写书评

暂无评论

鄂尔多斯盆地石油的稀土元素地球化学特征

中国稀土学报 2008年第3期26卷 374-380页

作者：潘爱芳赫英长安大学地球科学与国土资源学院陕西西安710054 西北大学地质学系陕西西安710069

研究了鄂尔多斯盆地石油的稀土元素地球化学特征。鄂尔多斯盆地石油的稀土元素球粒陨石标准化曲线具有3种模式,分别与富钙花岗岩、下地壳和上地壳岩石特征相似,反映了石油与这些岩石具有某种成因联系。其中,位于基底断裂带和构造热活动... 详细信息

研究了鄂尔多斯盆地石油的稀土元素地球化学特征。鄂尔多斯盆地石油的稀土元素球粒陨石标准化曲线具有3种模式,分别与富钙花岗岩、下地壳和上地壳岩石特征相似,反映了石油与这些岩石具有某种成因联系。其中,位于基底断裂带和构造热活动相对强烈的区域,石油的稀土模式与富钙花岗岩、下地壳岩石特征相似,显示这些成油的流体在运移过程中可能与深部岩石有过相互作用,抑或有深部流体物质的直接加入;在基底断裂不发育且构造稳定的区域,石油的稀土模式具有与上地壳沉积岩相似的特征。由此反映了不同构造区域,石油的物质成分来源不同,尤其是在基底断裂带和构造热活动相对强烈区,所赋存的油气田中有深部物质组分的运移和加入。

关键词：鄂尔多斯盆地石油深部流体基底断裂稀土

Aquathermolysis of conventional heavy oil with superheated steam

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2009年第3期6卷 289-293页

作者： Song Guangshou Zhou Tiyao Cheng Linsong Wang Yunxian Tian Guoqing Pi Jian Zhang Zheng department of geology Northwest University Xi＇an Shaanxi 710069 China Key Laboratory of Petroleum Engineering Ministry of Education China University of Petroleum Beijing 102249 China china National Offshore Oil Co. Ltd-Tianjin Tianjin 300452 China NO.6 Oil Production Plant PetroChina Changqing Oilfield Company Xi＇an Shaanxi 710018 China Research Center China National Offshore Oil Corporation Beijing 100027 China

This paper presents a new aquathermolysis study of conventional heavy oil in superheated steam. A new high temperature autoclave was designed, where volume and pressure could be adjusted. Aquathermolysis was studied on two different conventional heavy oil samples under different reaction times and temperatures. Experimental results show that aquathermolysis does take place for conventional heavy oil. As reaction time increases, the oil viscosity reduces. However, the reaction will reach equilibrium after a certain period of time and won＇t be sensitive to any further reaction time any more. Analysis shows that, while resin and asphaltenes decrease, saturated hydrocarbons and the H/C ratio increase after reaction. The main mechanism of aquathermolysis includes hydrogenization, desulfuration reaction of resin and asphaltenes, etc.

关键词： Conventional heavy oil superheated steam aquathermolysis viscosity reduction

Hydrogen isotopic characteristics and their genetic relationships for individual n-alkanes in plants and sediments from Zoige marsh sedimentary environment

在线全文

学校读者我要写书评

暂无评论

Hydrogen isotopic characteristics and their genetic relation...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： DUAN Yi~(1*),ZHENG ChaoYang~2 & WU Baoxiang~1 1 Key Laboratory of Petroleum Resources Research,Institute of geology and Geophysics, Chinese Academy of Sciences,Lanzhou 730000,china 2 department of geology,northwest university,xi’an 710069,china

To understand internal relations of their hydrogen isotopic compositions in typical marsh environment,we,using GC-IRMS analytical technique,measured the hydrogen isotopes of individual n-alkanes in the herbaceous plant,woody plant leaf,and sediments from Zoige marsh in *** results show significant differences in the hydrogen isotopic compositions of n-alkanes among the different kinds of plants and the different species in the same kind.δD values of n-alkanes in the herbaceous plants(from -254‰to -184‰) are lighter than those in woody plant leaf(from -195‰to -142‰),and the hydrogen isotopic compositions of n-alkanes in *** *** lighter than *** *** meanδD values of n-alkanes in the sediments from Zoige marsh reflect that they were derived from herbaceous plants,which is consistent with the peat samples being composed mainly of herbaceous plant *** significant differences in hydrogen isotopic compositions of n-alkanes among the sedimentary samples are caused possibly by environment factors and the difference in input quantity of different herbaceous plants.A certain negative correlation exists between theδC andδD values of n-alkanes in the samples, and plant types can be distinguished using the cross plot ofδD vs.δC values of n-alkanes in the *** data and recognitions provide scientific basis for hydrogen isotopic applied research of individual n-alkanes.

关键词： marsh environment plants sediments individual lipids hydrogen isotopes genetic relationship