共查询到20条相似文献，搜索用时 46 毫秒
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WU Cailai WANG Fusheng HAO Meiying SHI Rendeng Institute of Geology CAGS Beijing China WANG Zhihong Xi''''an Engineering College Xi''''an China QIAO Dewu Geological mechanics institute CAGS Beijing China 《Continental Dynamics》2000,(1)
1. Introduction Tongling district is situated in the southern part of the middle-lower reaches of the Yangtze River, Anhui province, China (Fig.1). It is one of the most important metal base in China, being rich copper material resources, also named "ancient copper capital of China". Many geologists have been working in petrology, tectonics and ore-deposits in the area for many years. Studies show none of the ore-deposits is not bound up with the intermediate-acid intrusion in the area (Ma… 相似文献
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<正>1 Introduction Qilian Block is located in between the South China Craton and the North China Craton and the Tarim Craton(Fig.1a),which is one of the key area to study the tectonic evolution of China.The Phanerozoic tectonic framework 相似文献
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The Rhinocerotidae is one of the most common and important families in the Pleistocene mammalian fauna of South China. Since the last century, most of the Pleistocene rhinocerotid fossils were prematurely assigned to Rhinoceros sinensis, which has resulted in confusion of taxonomy for decades, especially in South China. The Yanjinggou area in Chongqing Municipality of China, where the neotype of R. sinensis came from, has yielded abundant rhinocerotid fossils and is a key area to solve this problem. A recently discovered juvenile skull from a karstic fissure in this area can be referred to Dicerorhinus sumatrensis (Fischer, 1814), which is the first confirmed non-Rhinoceros rhinocerotid from the area. This new finding indicates that non-Rhinoceros fossils might have been mixed in AMNH collection from Yanjinggou and thus the diagnosis of Rhinoceros sinensis needs reformation. On the other hand, Stephanorhinus ?kirchbergensis is also detected in Granger’s collection based on our reobservation. The coexistence of Rhinoceros, Dicerorhinus and Stephanorhinus shows the higher diversity of Pleistocene rhinocerotids in South China. 相似文献
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<正>Objective Two important geological issues have long been controversial in the Xing–Meng area of North China.The first concerns the final closure of Paleo-Asian Ocean in Xing–Meng area,and the other concerns the folding and lifting of the Xing-Meng Trough.The focus of thses issues is the Late Permian sedimentary environment,which is 相似文献
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正1 Introduction Salt lakes are widely distributed in the western of China,especially in the area of Qinghai-Xizang(Tibet)Plateau.A series of salt lakes in the Qaidam Basin,located in Qinghai Province,China,is famous for their abundance of lithium,potassium and boron resources(Zheng et al,1988;Deng et al,2012).It is well known that the 相似文献
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CRETACEOUS-TERTIARY DESERTS IN SOUTHWESTERN CHINA AND DESERT SEDIMENTOLOGY 总被引：1，自引：0，他引：1 
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下载免费PDF全文 The special issue deals with the Cretaceous-Tertiary deserts in southwestern China and relevant sedimentological problems about deserts. The study area is located between 101°10＇- 107°00＇E and 28°00＇-30°40′ N. The ancient desert study is so little in China that there has not been a systematic report about it up to now. Based on the study in many ways on Cretaceous-Tertiary deserts in southwestern China, plentiful data have been obtained. Though it is still a bit rough, the study is a good beginning of the ancient desert study in China. The main ideas and conclusions are summarized as follows. 相似文献
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<正>1 Introduction The well-known1 Sichuan-Yunnan-Guizhou Triangle(SYGT)area of poly-metallic Zn-Pb deposits,southwest China is located at the south-western margin of the Yangtze Block in the transition area of the Tethys Belt and the Circum-Pacific Metallogenic Belt,and is composed of the Northeastern Yunnan,Northwestern 相似文献
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<正>1 Introduction The Pearl River Delta(PRD)is located in the north coast area of the South China Sea(SCS).As one of the largest delta in China,only the two latest events among the several tens of eustatic fluctuations occurring in the Quaternary were recorded in almost whole area of the PRD.There has been consensus on the age of the younger transgression sequence,which was dated to the Holocenc and resulted from a postglacial sea level rise,while there 相似文献
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<正>1 Introduction There are complex rocks exposed in the Diaoyutai area which is in western Liaoning,eastern North China Craton.The Neo-Archean"Suizhong migmatitic granites"are the important parts of the Diaoyutai 相似文献
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The Origin and Features of the Two Intermediate-Acid Intrusive Series in Tongling Area, Anhui, China 总被引：1，自引：0，他引：1
WU Cailai CHEN Songyong HAO Meiying SHI Rendeng Institute of Geology Chinese Academy of Geological Sciences Beijing 《Continental Dynamics》2001,(1)
1. Introduction Tongling district is situated in the southern part of the Yangtze River, Anhui province, China (Fig. 1). It is one of the most important metal basements in China, being rich copper material resources, also named "ancient copper capital of China". Studies showed that each copper ore deposit is bound up with the intermediate-acid intrusive rocks in the area. Therefore, many researchers (e.g. Chang Yinfu et al, 1987; Xing Fengming, et al, 1995; Zhou Xinrou, et al, 1993; and… 相似文献
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土压缩模量预测回归分析方法 总被引：1，自引：0，他引：1
在土压缩模量Es的分析计算中,常用的分析方法是根据土的e-p曲线试验资料建立公式求解,本文引入了数学上的回归分析方法来探讨Es与其它各项物理力学指标参数之间的相关关系,旨在找出对Es影响最显著的指标参数,并建立最优回归方程式,以此来预测Es。研究结果表明:该方法通用性强,应用范围广,亦可推广应用于其它相关领域。 相似文献
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Using the database of automatic hydrometeorological stations, installed in the Don RIver delta and Taganrog Bay seashore, the sources of the anomalois scale water negative surge and salinization of the Azov Sea under conditions of low river flow in 2015–2016 are studied. The new schemes of stratification and advection of salty sea waters in the Don River mouth under different weather conditions, water discharge and levels are given. 相似文献
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《International Geology Review》2012,54(10):1218-1225
Copper deposits of Cuba belong to the Jurassic lead-zinc-copper, Cretaceous copper and Paleogene copper complexes, which differ substantially in their formation conditions. The island is differentiated into a number of metallogenic zones formed at the initial and early stages of the Cuba folded province. Pinar del Rio, Pinos, Trinidad and Oriente zones, of an intrageanticlinal nature, are prospective with respect to copper vein deposits of the lead-Zinc-copper complex. The Sasa and Cauto zones - intrageosynclinal - are prospective with regard to copper-pyrite and copper vein deposits of the Cretaceous complex. A metallogenic study of the island is indicated in planning the exploration of its copper prospects. -- AGI Staff. 相似文献
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Ivan V. BRAGIN Georgy A. CHELNOKOV Oleg V. CHUDAEV Natalia A. KHARITONOVA Sergey V. VYSOTSKIY 《《地质学报》英文版》2016,90(1):276-284
Studied waters belong to warm(T=30-50℃),alkaline(pH=8.9-9.3),low mineralized(TDS235 mg/1)Na-HCO_3 or Na-SO_4-HCO_3 thermal waters with high content of SiO_2(up to 81 mg/l)and F(up to 3.9 mg/1),occur on modern volcano-tectonic rejuvenated areas of Eastern Sikhote-Alin orogenic belt.Low~3He concentration as well as N_2/O_2 and N_2/Ar ratios exclude influence of deep mantle fluid.New rare earth element data constrain our understandmg of water-rock interaction occurring in the water source region.Meteoric origin of waters is proved by stable isotope values varying from-71‰to-136.1‰and from-10.8‰to-18.8‰forδ~2U andδ~(18)O respectively.REE patterns reflect high pH,resultfing from water-rock interaction and oxidative conditions.Calculations of deep aquifer temperature using Na-K and quartz geothermometers show 116.8-131.1°C and 82.2-125.8℃respectively.Presence of deep faults both with abnormal thermal gradient(~45-50 K/km)define unique geochemical shape of thermal waters of Sikhote-Alin,area,where no present volcanic activity is registered. 相似文献
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Doklady Earth Sciences - Multiannual observations (2009–2017) by means of autonomous seiche recorders have been conducted for marine seiches with one second discreteness in the boot basin for... 相似文献
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