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1.
H. C. WANG 《地质学报》1944,(Z1):23-35
正 With 1 Plate. The material dealt with in this paper was collected by the late Mr. W. Y.Lin' from Takuan, Northern Yunnan~2 and by Professor P. Misch from near the Lufengtsun Station~(?) of the Yunnan-Indo-China Railway in 1939; and also by various xcursions of the Department of Geology of the National University of Peking to 相似文献
2.
A REVIEW OF THE PALEOHYDROLOGICAL AND GEOMORPHOLOGICAL CHARACTER OF LAKE NAM CO|SOUTHCENTRAL TIBET 
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下载免费PDF全文 《第四纪研究》2009,29(4):655-664
Department of Earth Sciences,Freie Universität Berlin,Malteserstraße 74－100,12249 Berlin,Germany)
The endorheic Lake Nam Co,south Eastern Tibetan Plateau,was selected to investigate the interrelation between drainage basin processes,especially postglacial glacier decay,and lake level fluctuations. Landforms of the drainage basin are highly influenced by tectonics,superimposed by fluvial and periglacial processes,and locally by glacial and eolian processes. Thus,geomorphological features and hydrological characteristics were compiled for the lakebasin to provide an overview of the landscape character. Data show that during the Last Glacial Maximum melt water from the mountains accumulated fluvial deposits in the foreland. Concurrently,an increase of the lake level occurred which is presently shown by a cliff line all around Nam Co with its base approximately 29m above the present lake level. The Holocene decrease of the lake level is traced by beach ridges. As Nam Co is an endorheic lake postglacial water loss has to be primarily explained by evaporation and moisture conditions. However,more detailed conclusions on quantitative and chronological patterns of both factors,meltwater input and evaporation output,still remain to be drawn. 相似文献
The endorheic Lake Nam Co,south Eastern Tibetan Plateau,was selected to investigate the interrelation between drainage basin processes,especially postglacial glacier decay,and lake level fluctuations. Landforms of the drainage basin are highly influenced by tectonics,superimposed by fluvial and periglacial processes,and locally by glacial and eolian processes. Thus,geomorphological features and hydrological characteristics were compiled for the lakebasin to provide an overview of the landscape character. Data show that during the Last Glacial Maximum melt water from the mountains accumulated fluvial deposits in the foreland. Concurrently,an increase of the lake level occurred which is presently shown by a cliff line all around Nam Co with its base approximately 29m above the present lake level. The Holocene decrease of the lake level is traced by beach ridges. As Nam Co is an endorheic lake postglacial water loss has to be primarily explained by evaporation and moisture conditions. However,more detailed conclusions on quantitative and chronological patterns of both factors,meltwater input and evaporation output,still remain to be drawn. 相似文献
3.
<正>The IGCP 649 project entitled "Diamonds and Recycled Mantle"was approved by UNESCO and IUGS in March 2015.This project is led by an international team of researchers,including Prof.Yang Jingsui of Institute of Geology of CAGS(China),Prof.Yildirim Dilek of Miami 相似文献
4.
The Quaternary： its character and definition 总被引：5，自引：0，他引：5
Martin J. Head Philip Gibbard Amos Salvador 《《幕》》2008,31(2):234-238
The Quaternary, is characterised by the development of widespread glaciations in mid-northern latitudes. As a chronostratigraphic term it has attracted vigorous debate. The Quaternao; as accepted by the International Union for Quaternary Research and proposed by the International Commission on Stratigraphy, begins at 2.6 Ma within a 2.8-2.4 Ma interval of profound change in Earth＇s climate system. 相似文献
5.
In the province of Anhui along the Yangtze River, especially on the south of it there occur many iron deposits. They have been described in "The Iron ore deposits and iron industry of China" by Dr. F. R. Tegengren published by the Geological Survey in the Memoir Series A, No. 2. However Dr. 相似文献
6.
A. W. GRABAU 《地质学报》1927,6(2):155-198
INTRODUCTION Since the publication of Dr. J. G. Andersson's important "Essays onthe Cenozoic of Northern China" in 1923 much material has accumulated, partlyas the result of the explorations by the Geological Survey of China and partlythrough the expeditions sent out by other institutions, especial1y the Central 相似文献
7.
GEORGE B.BARBOUR. 《地质学报》1923,2(1)
Ⅰ. INTRODUCTION. "One of the striking features in the Tsinan plain is a group ofisolated hillocks standing up boldly from it. Though mainly overgrown withvegetation, they are distinguishable by ther shape and dark colour from thelight-grey tabular limestone islands which for the last outposts pushedforward by the mountains lying to the south." 相似文献
8.
S.Mohanty 《地学前缘(英文版)》2013,4(3):245-245
<正>The evolution of the earth is marked by development of more than 70%of the present day continents during Archean.The Archean-Proterozoic boundary is characterized by continental amalgamation, and subsequent breaking and development of worldwide glaciations. The Paleoproterozoic time is characterized by change in atmospheric oxygen and intense biogenic activity during the early part,and amalgamation of the continents to form the supercontinent "Columbia", 相似文献
9.
A New Sauropod Dinosaur from the Late Cretaceous Gaogou Formation of Nanyang,Henan Province 总被引：1，自引：1，他引：0
ZHANG Xingliao Lü Junchang XU Li LI Jinhu YANG Li HU Weiyong JIA Songhai JI Qiang ZHANG Chengjun 《《地质学报》英文版》2009,83(2):212-221
A new sauropod dinosaur Baotianmansaurus henanensis gen. et sp. nov. from the Cretaceous Gaogou Formation of Neixiang, Henan Province is erected. It is characterized by somphospondylous presacral vertebrae; a highly-developed lamina system on the dorsal vertebrae; transverse process supported by four laminae; and the dorsal portion of the anterior centroparapophyseal lamina is bifurcated, with a small branch extending to the ventral surface of the prezygapophysis. It represents a new titanosauriform sauropod. 相似文献
10.
The ancient avifauna of this country is very little known to science.The two early accounts are the "Aves" in the Tertiary vertebrates fromMongolia by Prof.Dr.Schlosser (1924) and the "Oiseaux" in the secondpart—Paléontologie—of Paléolithique de la Chine by Marcellin Boule and P.Teilhard de Chardin (1928).Dr.P.R.Lowe of the British Museum has 相似文献
11.
Olivine in spinel peridotite xenoliths from the Bismarck Archipelago northeast of Papua New Guinea, which were transported
to the surface by Quaternary basalts, shows spinel inclusions up to 25 μm long and 200 nm wide. These inclusions mainly occur
as inhomogeneously distributed needles and subordinately as octahedral grains in olivine of veined metasomatic peridotites
as well as peridotites without obvious metasomatism. The needles very often occur in swarms with irregular spacing in between
them. Similar spinel inclusions in olivine have only previously been reported from ultramafites of meteoritic origin. Composition
and orientation of the spinel inclusions were determined by transmission electron microscopy (TEM) and analytical electron
microscopy (AEM). Both the needles and the grains display a uniform crystallographic orientation in the host olivine with
[001]O1//[1ˉ10]Spl and (100)Ol// (111)Spl. The needles eare elongated parallel [010] in olivine, which is the same in all olivine grains. As these needles have no
relation to the metasomatic sections in the peridotite, it is concluded that they are primary features of the rock. Although
the composition of the spinel needles is often very similar to the large chromian spinel octahedra in the matrix, the small
octahedral spinel inclusions in olivine are in part Mg-rich aluminous spinel and sometimes almost pure magnetite. The spinel
needles are suggested to have formed by exsolution processes during cooling of Al- and Cr-rich, high-temperature olivine during
the initial formation of the lithospheric mantle at the mid-ocean ridge. The Al-rich spinel octahedra probably formed by the
breakdown of an Al-rich phase such as phlogopite or by metasomatism, whereas the magnetite was generated by oxidizing fluids.
These oxidizing fluids may either have been set free by dehydration of the underlying, subducted plate or by the Quaternary
magmatism responsible for the transport of the xenoliths to the seafloor.
Received: 25 May 2000 / Accepted: 12 July 2000 相似文献
12.
This paper deals with the mechanism of dissolution reaction kinetics of minerals in aqueous solution based on the theory of surface chemistry.Surface chemical catalysis would lead to an obvous decrease in active energy of dissolution reaction of minerals.The dissolution rate of minerals is controlled by suface adsorption,surface exchange reaction and desorption,depending on pH of the solution and is directly proportional to δH^n0 ,When controlled by surface adsorption,i.e.,nθ=1,the dissolution rate will decrease with increasing pH;when controlled by surface exchane reaction,i.e.,nθ=0,the dissolution rate is independent of pH;when controlled by desorption,nθis a positive decimal between 0 and 1 in acidic solution and a negative decimal between-1 and 0 in alkaline solution.Dissolution of many minerals is controlled by surface adsorption and/or surface exchange reactions under acid conditions and by desorption under alkaline conditions. 相似文献
13.
FANG Weixuan 《《地质学报》英文版》2017,91(Z1):199-201
<正>1 Introduction Research and development on assembled techniques of geochemical lithofacies is to be oriented,at the firstly,by technological issues or conundrum in methodology,and to be subsidiary directed by applications of theoretic basis in sedimentary basin analysis and explorations for minerals in the ore-hosting basin.However these are to be steered by integrated knowledge and cross-sectional study while they are focused on the core value and innovative technology. 相似文献
14.
《《地质学报》英文版》2015,(2):694
<正>Acta Geologica Sinica(English Edition)is a bimonthly,SCI-indexed academic journal produced by the Geological Society of China.Having an impact factor ranging from 1.5 to 2.15,it has long been indexed by many international databases and websites,such as SCI,CA,BIG,etc.Internationally,the journal cooperates with John WileySons Co.Ltd to publish the electronic version;all papers can be downloaded online.Contributors wishing to submit,read,enquire and 相似文献
15.
PIERRE LEROY 《地质学报》1939,19(4)
Very little·has·been written about fossil Unionids of China.Except for a short Monograph by Odhner "Shells from the San MenSeries",in which the author refers to the determination of some fossil"Quadrula" by Dall,there is practically nothing printed on the subjects 相似文献
16.
A New Somphospondylan Sauropod (Dinosauria, Titanosauriformes) from the Late Cretaceous of Ganzhou, Jiangxi Province of Southern China 总被引：1，自引：0，他引：1
A new somphospondylan sauropod (Dinosauria, Titanosauriformes): Gannansaurus sinensis gen. et sp. nov. from the Late Cretaceous Nanxiong Formation of Ganzhou Basin, Jiangxi Province of southern China is erected based on one nearly complete dorsal vertebra and a mid-caudal vertebra. It is characterized by two centroprezygapophyseal lamina fossae; large, square-shaped concavity formed by centroprezygapophyseal lamina and dorsal margin of the centrum; large infraparapophyseal fossa; three openings present within the large lateral concavity, which occupy 65% length of the centrum; the posterior centroparapophyseal lamina (PCPL) and the anterior centroparapophyseal lamina (ACPL) weakly developed; the posterior centrodiapophyseal lamina (PCDL) separated by an infradiapophyseal fossa into two branches dorsally; parapophyseal and diapophyseal laminae cross to form "K" configuration. It shares some characters with the Early Cretaceous form-Euhelopus, indicating that it is more closely related to Euhelopus rather than to other titanosauriform sauropods. This means Gannansaurus may have a close phylogenetic relationship with Euhelopus. 相似文献
17.
Ⅰ. INTRODUCTION. The microscopical study of coal either by thin section or by polished section has formed now a special branch of geological science which is called in Germany "Kohlenpetrog(?)aphie." This name is not at all a satisfactory one as, so far as I know, it has been followed neither in America nor in European 相似文献
18.
Siliceous Cementation of Chlorite-Coated Grains in the Permian Sandstone Gas Reservoirs, Ordos Basin
<正>Objective It has long been controversial that whether authigenic chlorite coatings in sandstone reservoirs can prevent precipitation of siliceous cements.It is commonly believed that chlorite coatings(also called chlorite films,chlorite linings,or chlorite rims)may prevent quartz overgrowth,and thus help the preservation of original pores in sandstone reservoirs.Recently,however,this assumption has been challenged by reservoir geologists.This dispute cannot be solved by mere analysis of thin sections,nor by chemical equations and diagenesis analysis.The main objective of the present contribution is to shed light on this 相似文献
19.
《《地质学报》英文版》2015,89(1):324-324
<正>Acta Geologica Sinica(English Edition)is a bimonthly,SCI-indexed academic journal produced by the Geological Society of China.Having an impact factor ranging from 1.5 to 2.15,it has long been indexed by many international databases and websites,such as SCI,CA,BIG,etc.Internationally,the journal cooperates with John WileySons Co.Ltd to publish the electronic version;all papers can be downloaded online.Contributors wishing to submit,read,enquire and 相似文献
20.
《《地质学报》英文版》2015,89(4):1426-1426
<正>Acta Geologica Sinica(English Edition)is a bimonthly,SCI-indexed academic journal produced by the Geological Society of China.Having an impact factor ranging from 1.5 to 2.15,it has long been indexed by many international databases and websites,such as SCI,CA,BIG,etc.Internationally,the journal cooperates with John WileySons Co.Ltd 相似文献