检索结果-南通市图书馆

Tectonic Factors Favourable for the Formation of Evaporites in the Indosinian Period in hubei and Its Neighbouring Areas

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1988年第4期1卷 381-391页

作者： Li Shiruo China University of Geosciences, Wuhan, hubei China University of Geosciences Wuhan Hubei

In the Indosinian period. the climate was scorching hot and the source of seawater was ample in hubeiand its neighbouring areas. so the basic conditions for the formation of evaporites were favourable. Under thisprerequisite. the reason why salt deposits occurring in some third-order tectonic units between the Jiangnanoldland-upwarped zone and the Dabashan upwarped zone differ in degree of development is mainly due to thetectonic factors during sedimentation. If favourable tectonic factors are present, large amounts or evaporiteswill form: on the contrary. they will not.

关键词： In

Microfossils from the Chert in the Lower Cambrian Shuijingtuo Formation at Miaohe, Zigui, hubei Province

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1993年第2期67卷 223-233,246-247页

作者： Yin Chongyu, Yue Zhao, Gao Linzhi Institute of Geology, CAGS, Beijing and Ding Qixiu hubei Geological Institute, hubei Bureau of Geology, Wuhan Institute of Geology CAGS Beijing China

This paper reports for the first time on the microfossils discovered in the black cherts of the basal part of the Lower Cambrian Shuijingtuo Formation at Miaohe village, Zigui County, hubei Province, all of which were observed in thin sections. Nine genera, 9 species and 3 indeterminate species (including a new species) are described. According to these microfossils, the conclusion is made that the microfossil zone may be equivalent to the small shelly fossil assemblage zones 2—3 of the Meishucun stage. They have provided another important line of evidence for the correlation of the Sinian-Cambrian boundary strata with those of the adjacent areas.

关键词： the Lower Cambrian the Shuijingtuo Formation chert microfossil the Sinian-Cambrian Boundary

^(207)Pb/^(206)Pb Zircon Dating of the Huangtuling Hypersthene-Garnet-Biotite Gneiss from the Dabie Mountains, Luotian County, hubei Province, China: New Evidence for Early Precambrian Evolution

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1999年第1期73卷 78-83,127-128页

作者： JIAN Ping YANG Weiran and ZHANG Zichao Institute of Geology,CAGS,26 Baiwanzhuang Rd, Beijing 100037 China University of Geosciences, Wuhan, hubei 430074 Yichang Institute of Geology and Mineral Resources, CAGS, Yichang, hubei 443003 CAGS Inst Geol Beijing 100037 Peoples R China China Univ Geosci Wuhan 430074 Hubei Peoples R China CAGS Yichang Inst Geol & Mineral Resources Yichang 443003 Hubei Peoples R China

The Huangtuling hypersthene-garnet-biotite gneiss at Luotian County, hubei Provine, is a typicalgranulite-facies rock of the Dabie Group Complex in the Dabie orogenic belt. Investigations on the morphology andoccurrence of zircons and their internal structures shown in the thin sections lead to the recognition of three types ofzircons, which are in good agreement with the types identified on the basis of morphology, colour and external fea-tures from the related zircon concentrates. The observation of zircons in the rock reveals that part of type 1 zirconsshow signs of a double-layered structure. The interval part existed in the protolith prior to the granulite-facies meta-morphism. Type 2, the prismatic zircons which mainly occur in garnet and hypersthene are metamorphic minerals ofthe granulite-facies metamorphism. Type 3, the round multifaceted zircons in felsic minerals and biotite, are proba-bly attributed to a later geological event related to migmatization. The ^(207)Pb/^(206)Pb zircon dating by direct evaporationon (thermal evaporation ion mass spectrometer) yields ages ranging from 2814 Ma to 1992 Ma. The age discrepancyamong these different zircon types is conspicuous. The yellow-brown(type 1) zircons give ages of 2814±29 Ma to2527±6 Ma, the prismatic euhedral zircons (type 2), 2456±7 Ma to 2254±4 Ma, and the round multifaceted zircons(type 3), 1992±10 Ma. The results are geologically interpreted in consideration of the complicated behaviours of zir-cons during Precambrian geological evolution of the Dabie area. (1) If the protolith of the gneiss is a sedimentaryrock, then type 1 zircons are clastic ones and the ages 2814±29 Ma and 2811±27 Ma may reflect the minimum age ofthe rocks of its source region. also the first geological event in the area. Sedimentation of the protolith occurred be-tween 2814 Ma and 2527 Ma, probably close to 2814 Ma. If the protolith is a volcanic rock, then the formation age ofthe supracrustal rocks of the Dabie Group Complex is

关键词： Dabie Mountains granulite facies Archaean multistage evolution zircon 207~Pb/206~Pb

hubei Students Circle and hubei in the Late Qing Dynasty

在线全文

学校读者我要写书评

暂无评论

学术界 2010年第12期 279-281页

作者： Song Hui Zhou Jiming School of Social Sciences and Engineering Management,Soochow University Institute of Ideology and Culture,hubei University

As the first paper named after the province and founded by the Chinese studied in Japan at the end of Qing Dynasty and the beginning of Republic of China,the historical position and academic values of hubei Students Circle has long been paid attention to either from the perspective of press history or modern history or thought *** shows it is closely linked to the late Qing Dynasty in hubei Province that the publication named "hubei".In order to do a little bit contribution to the study of the hubei Students Circle and hubei in the late Qing Dynasty,the author attempts to interpret the subject of hubei Students Circle and hubei in the Qing Dynasty from the above aspects completely and *** are welcome.

关键词： hubei Students Circle the end of Qing Dynasty provincial boundaries colleagues

Forecasting Loss of Ecosystem Service Value Using a BP Network: A Case Study of the Impact of the South-to-north Water Transfer Project on the Ecological Environmental in Xiangfan, hubei Province, China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Biomedical and Environmental Sciences 2003年第4期16卷 379-391页

作者： YUN-FENG CHEN, JING-XUAN ZHOU, JIE XIAO, AND YAN-PING LIEnvironmental Science and Engineering College, Huazhong University of Science and Technology, Wuhan 430074, hubei, China Environmental Science and Engineering College Huazhong University of Science and Technology 湖北 Wuhan 430074

Objective To recognize and assess the impact of the South-to-north Water Transfer Project (SNWTP) on the ecological environment of Xiangfan, hubei Province, situated in the water-out area, and develop sound scientific countermeasures. Methods A three-layer BP network was built to simulate topology and process of the eco-economy system of Xiangfan. Historical data of ecological environmental factors and socio-economic factors as inputs, and corresponding historical data of ecosystem service value (ESV) and GDP as target outputs, were presented to train and test the network. When predicted input data after 2001 were presented to trained network as generalization sets, ESVs and GDPs of 2002, 2003, 2004... till 2050 were simulated as output in succession. Results Up to 2050, the area would have suffered an accumulative total ESV loss of RMB 104.9 billion, which accounted for 37.36% of the present ESV. The coinstantaneous GDP would change asynchronously with ESV, it would go through an up-to-down process and finally lose RMB89.3 billion, which accounted for 18.71% of 2001. Conclusions The simulation indicates that ESV loss means damage to the capability of socio-economic sustainable development, and suggests that artificial neural networks (ANNs) provide a feasible and effective method and have an important potential in ESV modeling.

关键词： Artificial neural network BP Ecosystem service value South-to-north Water Transfer Project

hubei,the Cradle of Chu Culture

在线全文

学校读者我要写书评

暂无评论

Women of China 1994年第1期 45-46页

作者： YU SHAOBO the hubei Provincial Museum ZHAO NING

hubei Province is also known as Chu, because from the eleventh to third century B.C., the State of Chu rose, developed and fell here. hubei is situated in central China and covered with some thousand lakes, since the Yangtze and Hanshui Rivers join here. It has an area of 186,000 square kilometers and a population of 54.39 million. hubei has good soil,

关键词： hubei,the Cradle of Chu Culture

ON TWO NEW SPECIES OF TRICULA SNAILS HARBOURING CERCARIAE OF PARAGONIMUS SKRJABINI FROM hubei AND FUJIAN PROVINCES, CHINA

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

湖北医学院学报 1983年第1期 109-110页

作者： Kang Zai-bin (Department of Parasitology, hubei Medical College)

1. Tricula pingi, sp. nov. (figs. 1～3) Holotype: Length 4.35mm, breadth 1.65mm;length of aperture 1.56mm,breadth of aperture 0.95mm. Paratypes: Length 2.89～4.43mm,breadth 1.2 ～1.65mm; length of aperture 0.91～1.65mm,breadth of aperture 0.64～*** in September, 1979 at Shenjiabao,Wufeng, hubei. Diagnosis: The shell is minute, elongate-conical, thin and ***

关键词： length view body ON TWO NEW SPECIES OF TRICULA SNAILS HARBOURING CERCARIAE OF PARAGONIMUS SKRJABINI FROM hubei AND FUJIAN PROVINCES CHINA

Dynamic Mechanism of Migmatization in the Dabie Complex, Northeastern hubei, China

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 1995年第2期69卷 135-154页

作者： Wang Jianghai, Guangzhou Institute of New Geological Technology, Academia Sinica, Guangzhou,GuangdongYang Wenhua and Wu Jinping China U niversity of Geosciences, W uhan, hubei Jiang M inxi Guangzhou Institute of New Geological Technology Academia Sinica Guangzhou Guangdong China

On the basis of the detailed field work, compositions and contents of plagioclase and K - feldspar,determination of ordering degree, statistical analysis of plagioclase elongation index, mass-balance calculation and mineral spatial distribution and geochemistry, it is concluded that the migmatites in the Dabie complex are characterized by the presence of thermocenters. There are regular changes in mineral character in the migmatites from the centers outwards. The dominant genetic mechanism is anatexis and metasomatism, whose intensities decrease from the centers outwards. Finally, according to the simulated experiment on Liesegang' s rings and non-linear dynamics (dissipative structure theory), the dynamic mechanism of migmatization is profoundly expouded as consisting of the early-stage metasomatism induced by the thermal anomaly, the cardinal-stage anatexis induced by the early-stage matasomatism and finally the last-stage post-anatexis metasomatism.

关键词： Dabie complex migmatites dynamic mechanism dissipative structure diffusion inverse to concentration gradients

Clean School Campus-Report on the Implementation of Ecological School Campus Construction of the Sino-Dutch Cooperation Project in Enshi of hubei

在线全文

学校读者我要写书评

暂无评论

Clean School Campus-Report on the Implementation of Ecologic...