摘要:1 Introduction Voluminous literature has resulted from study of the geology and tectonic evironments of post-orogenic granitoids in eastern Tianshan (He et al., 1995; Han et al., 1997; Gu et al., 1999, 2001; Li et al., 2003; Chen et al., 2004). Previous contributions (Hu et al., 1997; Li et al., 2003) indicate that major events of continental collision in northern Xinjiang occurred around 300 Ma. Then, the tectonics converted from compression to extension, resulting in the uplifting of th…

摘要:1 Introduction Southern Guizhou, especially the Dushan area, has been one of the most important areas for the study of the Devonian in South China, for example, Hou and Xian’s (1975) study of the Eifelian brachiopod fauna. The Upper Devonian in the Dushan section is mainly composed of carbonate rocks, with rare siliciclastics. Abundant benthic fossils (corals and brachiopods) have been found in these Frasnian strata (Liao et al., 1979). The Frasnian corals were described by Liao (1977)…

摘要:1 Introduction Tapejarids are a group of highly specialized pterosaurs with a short skull bearing high premaxillary and deep dentary crests. Due to their skull morphologies, the tapejarid pterosaurs are easily set apart from other pterosaur clades (Kellner, 1995, 1996). The tapejarids found so far are mainly distributed in Brazil (Wellnhofer, 1991), Morocco (Wellnhofer and Buffetaut, 1999) and northeastern China (Wang and Zhou, 2002; Li et al., 2003). All the known Chinese tapejarid pter…

摘要:1 Introduction The Hailar Basin is located in the southwestern part of Hulun Buir League of Inner Mongolia Autonomous Region, China. The basin is bounded to the east by the Yimin River, to the west by the western shore of Hulun Lake, to the north by the northern bank of the Hailar River and to the south merges into Mongolia. The basin is between 115°30' –120°00'E and 46°00'–49°20'N covering an area of 70480 km2 (Fig. 1). Its Paleozoic tectonic setting belongs to the Xuguit Qi …

摘要:1 Introduction The stromatolites of the Jiawengmen area in the southern belt of the Eastern Kunlun orogen were initially interpreted as vortex structures by the Regional Geological Survey Team, Qinghai Bureau of Geology and Mineral Resources in 1973; these samples were then identified as algal fossils of Sinian age by the Nanjing Institute of Geology and Paleontology (Qinghai Bureau of Geology and Mineral Resources, 1973). In 1994, Chen and Luo (1998) discovered some stromatolites, i…

摘要:1 Introduction Since the Guilaizhuang gold deposit was discovered in the 1980s, the Tongshi magmatic complex has attracted attention since it exhibits a spatial-temporal relationship to gold mineralization. In the past ten years, a number of detailed fundamental researches have been carried out on the complex, Guilaizhuang gold deposit and their relationships (Qiu et al., 1994; Lin et al., 1996; Yan et al., 1996; Xu et al., 1999; Kong et al., 2001; Shun et al., 2001). Up to date, some res…

摘要:1 Introduction There are many mafic dikes in the Xiazhuang uranium ore field located in the eastern part of the Guidong composite granite body in northern Guandong Province. The uranium ores are closely associated spatially with mafic dikes (Fig. 1) (Deng et al., 2003). Many studies have been conducted since the 1950s mainly focusing on the genesis of uranium mineralization and its relationship with the mafic dikes (Wang, 1986, 1989; Hu, 1989; Hu and Jin, 1990; Jin and Hu, 1990; Hu et al…

摘要:1 Main Tectonic Units in Eastern China For a long time it was believed that there were two main cratons (platforms) in eastern-central China: the North China (or Sino-Korea) Craton and the Yangtze Craton; to the north and south of them there occurred a Hercynian orogen and a Caledonian orogen respectively. Recent advances have challenged the above-mentioned ideas, and new outcome shows that eastern China may have resulted from amalgamation of some relatively small blocks in the Yanshani…

摘要:1 Introduction Basin analysis is an integrated study of sedimentary basins as geodynamical entities. Sedimentary basins are worthy of studying because they are primary repositories of geological information on subsidence, crust evolution and valuable clues to the way by which the lithosphere deforms (Philip and Jone, 2002). Although relatively successive sedimentary sequences from Jurassic to Cretaceous are preserved in western Shandong, the Mesozoic deposits and basins have received a litt…

摘要:1 Introduction Molar tooth structures (MTS) represented by complex ptygmatical folds are widely distributed in Proterozoic fine-grained carbonates in northern Europe, North America, Africa, Australia and East Asia. Although the interpretation of the MTS origins is still controversial, geologists are exploring its generating mechanism because of its universal occurrences and special sedimentary structures in Meso-Neoproterozoic carbonate rocks, and more than ten interpretations of its or…

摘要:1 Introduction The Badain Jaran Desert, located in western Inner Mongolia, China, has a unique landscape containing 144 lakes (72 of which are still watery) with a total water area of about 23 km2, and the world’s highest stationary sand dunes with a height between 200 m and 500 m. Much attention has been paid to the water recharge of the desert in the past decade. Investigations on the resources of water system there have been performed continuously since the early 1990s, which lead to th…

摘要:1 Introduction Tellurium is located in the fifth period and the sixth major group of the element periodic table, whose chemical nature is similar to those of sulfur and selenium. Tellurium is a scattered rare element on the earth and its concentration is very low in earth’s crust, only 1.0 ng/g (Cox, 1989). However, the tellurium content is extremely high in aerolites, up to 2320 ng/g (Anders and Grevesse, 1989). Independent tellurium minerals are scarce, with only calaverite, tetradymite,…

摘要:1 Introduction The Black Sea (Fig. 1) with a surface area of 432.000 km2 and water depths exceeding 2200 meters is a semi-enclosed and the largest modern anoxic basin in the world having characteristic hydrographic, morphological and geological conditions varied with space and time (Degens and Ross, 1974; Ross et al., 1978; Sorokin, 1983). Geologically, the formation of the greate Black Sea basin can be traced back to the Late Cretaceous subduction of the Tethys Ocean beneath the Euroasi…

摘要:1 Introduction Hexigten is situated at the eastern part of the Inner Mongolian Plateau, south of the Da Hinggan Mountains and northwest of Chifeng City, Inner Mongolia, China. It is also at the junction of the Da Hinggan Mountians, Inner Mongolian Plateau and Yanshan Mountains. It is about 650 km north of Beijing. The geographic coordinates are 116?30'?118?20'E and 42?20'?44?10'N (Fig. 1). The elevation range is from 1100 m to 1700 m, and the highest peak (2029 m) of the Da Hinggan…

摘要:On the Stratigraphic Sequence, Lithological Characteristics and Origin of the Lower Permian Pangduo Group in Lhunzhub County, TibetJI Zhansheng, YAO Jianxin, WU Guichun, ZHAN Lipei, JIANG Zhongti and FU Yuanhui(Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037; Geologica] Physical Data Center, Ministry of Land and Resources, P. R. China, Hebei 065201; China University of Geosciences, Beijing 100083)The paper deals with the sequence and lithologi…