摘要:1 IntroductionIn recent years, numerous pterosaurs had been foundfrom continental sediments in the Yixian Formation and theJiufotang Formation of the western Liaoning Province andits neighboring areas of China. To this date, nine generaand ten species have been reported. These includeEosipterus yangi (Ji and Ji, 1997), Dendrorhynchoidescurvidentatus (Ji and Ji, 1998; Ji et al., 1999), Haopterusgracilis (Wang and Lü, 2001), Jeholopterusningchengensis (Wang et al., 2002), Sinopterus don…

摘要:1 IntroductionCtenochasmatid pterosaurs are characterized by theanterior end of rostrum dorsoventrally compressed androunded, teeth project laterally from the dental border of therostrum at least in the anterior part of the dentition(Wellnhofer, 1970, 1978; Unwin, 2003). Somectenochasmatids have extremely elongated rostrum and thedentition is formed by a great deal of long and slender teeth,e.g., Ctenochasma has over 150 teeth (Kellner, 2003),Gnathosaurus has 130 less densely arranged teeth,…

摘要:1 IntroductionPsittacosaurids, or parrot-beaked dinosaurs, were agroup of small-sized, bipedal herbivorous dinosaurs knownonly from the Early Cretaceous of East Asia (You andDodson, 2004). Hongshanosaurus houi You et al. 2003from western Liaoning Province of China represents thesecond genus of Psittacosauridae (You et al., 2003). Theholotype of Hongshanosaurus houi is an almost completejuvenile skull and lower jaw. Here, we describe an adultspecimen consisting of a complete skull and low…

摘要:1 IntroductionOphiolitic rocks in the northern Tianshan Mountains areexposed intermittently along a WNW-ESE-trending belt,extending from the Houxia through Bayan Gol to Ebinurlake, which is known as the "North Tianshan late-Paleozoicophiolite belt" or NTOB located on the northern margin ofthe Tianshan Carboniferous-Permian rift system (Fig. 1).The ophiolitic exposures in the Bayan Gol area are therepresentatives of this ophiolite belt (Fig. 2).Many different tectonic settings have be…

摘要:1 IntroductionThree E-W-trending lithologic belts of the Paleozoic ageoccur in the eastern part of north Qilian. From north tosouth they are (a) the Huangyanghe-Gulang-Dajing-Beidengzi belt (the northern lithologic belt), (b) theLeigongshan-Maomaoshan-Laohushan belt (the middlelithologic belt) and (c) the Mayaxieshan-Shihuigou-Beiyinbelt (the southern lithologic belt) (Fig. 1). The rocks inthese belts are mainly Paleozoic volcanics and sandysiltstone. There are some Mesozoic and Cenozo…

摘要:1 IntroductionSoutheast China lies at the plate junction between thePacific and the Eurasian plates, where granitoids andvolcanic rocks are widely exposed and large-scalemineralization was developed in the Late Mesozoic.Therefore, many geologists have paid much attention to thegeodynamics in this region (Jahn et al., 1990; Lampierre etal., 1997; Zhou and Li, 2000; Li, 2000; Chen et al., 2002; Liet al., 2003). Many achievements in scientific research onthe Late Mesozoic granitoids and vol…

摘要:1 IntroductionThe Longgang volcanic cluster located in the middle partof Longgang Mountain is one of the active volcanoes innortheast China, potentially hazardous of explosion in thefuture (Fan et al., 2002). Within an area of 1700 km2, thereare about 160 volcanic cones, craters and maars (Ou, 1984).Among these volcanoes, the Jinlongdingzi and Dayizishanvolcanoes which are well studied have experiencedrepetitious eruptions (Wang and Jin, 1999). Detailedresearch on their eruption cycles is …

摘要:1 IntroductionCherts are volumetrically a minor yet ubiquitouscomponent in the global sedimentary record. It is veryimportant to determine their original depositional settingsbecause many chert sequences are located at keystratigraphic intervals or in structurally allochthonouspackages, and they provide critical information on theformation of sedimentary basin and tectonic activity(Murray, 1994). Chemical methods of delineatingdepositional environments are becoming increasinglysophisticated an…

摘要:1 IntroductionIn recent years, a great deal of efforts has been made tostudy fractal properties of time, space, and intensity ofseismic activities (An et al., 1989; Wang and Lin, 1993;Wang, 1995; Godano, Alonzo and Bottari, 1996).However, most previous studies have been limited to singlefractal (capacity dimension D1 and information dimensionD2). Scientists have found that a single fractal usually is notenough to characterize temporal and spatial fractalproperties of earthquakes, and the l…

摘要:1 IntroductionIn general, gold deposits in central and eastern Chinawere formed mainly in the mesozoic (Hua and Mao, 1999;Mao and Wang, 2000; Wang et al., 2001b), those innortheastern China formed from Proterozoic to Cenozoic(Chen et al., 2000; 2001), those in northwestern Chinamainly in the Paleozoic (Li et al. 1998; Rui et al. 2002;Wang et al. 2002a), whereas the gold deposits insouthwestern China were formed mainly in the Himalayas(Wang et al., 1998; 2000; Chen and Wang, 2001). Inso…

摘要:1 IntroductionThe Yan-Liao orogenic belt lies in the northern segmentof the North China Block (NCB) (Fig. 1). During Mesozoicto Cenozoic time, it experienced intense tectono-magmaticactivation, accompanied by the formation ofintracontinental basins and widespread magmatism and is avery important area to study continental dynamics andMeso-Cenozoic tectonic evolution in eastern China. Mostof previous work in this area has focused on the formationof basement, structural style and volcano-se…

摘要:1 IntroductionMineralization in E. Xinjiang constitutes an importantpart of the Mid-Asian Metallogenetic Province. A greatdeal of nonferrous, ferrous, rare and noble metaldeposits of different genetic types and ages were formedduring different crustal evolution stages and werecontrolled by regional tectonic evolution. Large-scalemineralization of metallic deposits and relatedmagmatism mainly occurred during the Carboniferous toPermian periods (Li et al., 1998; Ji et al., 1999; Mao etal., 2…

摘要:1 IntroductionThe Sawur gold belt is an eastward extending section ofthe Zarma-Sawur gold-copper belt in Kazakhstan, locatedin the Sawur Mountain, northern Xinjiang, and mainlycomprises two large- to medium-sized gold deposits,accompanied by five small gold deposits and a series ofgold ore spots (Yin et al., 1996, 2003; Wang et al., 1999; Liet al., 2000; Liu et al., 2003; Shen et al., 2004a). TheKuo'erzhenkuola and Bu'erkesidai gold deposits are thebiggest and most important ones in this …

摘要:1 IntroductionAmong numerous heavy metals anomalies in soils in cityand town areas and their surroundings, Hg anomalies arethe most widely distributed one. Existing data ofgeochemical surveys have shown that Hg anomalies in soilsare widespread in city and town areas, big or small, andtheir surroundings in China, and that the intensity of Hganomalies is closely related to the level of human activities(Zhang and Zhang, 2001; Zhao, 2002; Liao et al., 2004).However, no clear conclusion has been…

摘要:1 IntroductionUnlike other sensors that passively sense radiation fromtargets illuminated by the Sun, microwave remote sensinginstruments can function day and night and, at somewavelengths, they will not be interfered significantly byatmospheric conditions (e.g. clouds). Microwave remotesensing signals are sensitive to the surface roughness, theinternal structure, and the complex dielectric constant ofthe sensing objective, i.e., they can provide information onsubsurface structure and volume c…

摘要:Fauna Replacement Event of the Middle and Late Permian inthe West Qinling MountainsZeng Xuelu and Gao Jinhan(China University of Geosciences, Beijing 100083)The middle and late Permian faunas from the west QinlingMountains have suffered a replacement event during thedeveloping history. It behaves that the fusulinids occurring fromthe bottom of the late Maokouan Dieshan Formation of the middlePermian were sharply reduced or disappeared, and thebrachiopods were prosperously developed. T…

摘要:http://www.geoanalysis2006.com1. Title of the ConferenceGeoanalysis2006—The 6th International Conference on the Analysis of Geological and Environmental Materials2. Subject of the ConferenceModern Analytical Technologies for Resource and Environment MaterialsMain Topics for the Symposia:(1) Analytical techniques for environmental and geochemical studies, including automation, speciation, isotopic andorganic analysis.(2) Advances in microprobe techniques and relevant reference material…

摘要:1. Papers should be devoted mainly to various aspects of research concerning geosciences and related disciplines in China, such asstratigraphy, paleontology, origin and history of the Earth, structural geology, tectonics, mineralogy, petrology, geochemistry,geophysics, geology of mineral deposits, hydrogeology, engineering geology, environmental geology, regional geology and newtheories and technologies of geological explpration. Those of scientific interest to the geological community in Chin…