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| 1 | Late Carboniferous-Early Permian Sequence Stratigraphy and Depositional Evolution in the Northeast Ordos Basin,North China显示文摘顺序地层学的分析被用于东北 Ordos 盆的上面的含碳降低二叠的沉积继任,北方中国基于从十条全部记载的曲线和八个露头获得的数据。lithostratigraphical 单位的外形框架,太原形成在二个外形协会包括七外形,从 fluvio 三角洲变化到架障碍岛。外形在一个 chronostratigraphical 框架以内被介绍,由系统道连接了,它接着由充满表面和顺序边界是有限的。六个第三顺序的 depositional 序列被认出,由六种类型跳了 2 不顺从。一个浅得向上的来自於大陆的海沉积模型被创造,它由沙岩,煤缝接和碳酸盐继任组成。 | YANG Minghui LIU Chiyang LAN Chaoli LIU Le LI Xin ZHANG Kunshan | 2010 | Acta Geologica Sinica(English Edition)2010，84，5： | 7 |
| 2 | Sequence framework of two different kinds of margins and their response to tectonic activity during the Middle-Late Triassic, Ordos Basin显示文摘Two kinds of margin respectively occur in the Ordos Basin during the Middle-Late Triassic (Yanchang Age), one is foreland margin developed under the background of flexural subsidence by thrusting intensively in the southwest margin, and the other is intracratonic basin margin by stable subsidence in northern and central parts of the basin. The Middle-Late Triassic Yanchang Formation can be divided into four regional third-order sequences, which are separated by gentle angular unconformity or regional erosion surface, made up of lowstand system tract (LST), expanding system tract (EST) and highstand system tract (HST) from lower to upper within a sequence. But there are distinct differences of the sequence framework between the southwest margin and northern and central parts of the basin. The southwest margin develops heavy conglomerate layer and unconformity as a result of orogeny by thrusting, and the intracratonic basin margin by stable subsidence in the northern and central parts grows aggradational sandstone, conglomerate in fluvio-delta system and parallel unconformity. The depositional framework of southwest margin reflects the tectonic evolution from flexural subsidence by thrusting to rebounded uplift. The formation of sequence boundary is related to the resilient uplift and erosion. The sequence stratigraphic framework and depositional system tract configuration in the foreland basin are controlled by structural activity of the fold and thrust belt, and the sequence succession reflects episodic thrusting of the Middle-Late Triassic toward the foreland basin. The sequence evolution in northern and central parts reflects the depositional succession of fluvio-delta system under intracratonic background, composed of coarse-grained sediment in braided channel deposit at the lower, meandering channel deposit in the middle and fine-grained sediment in the flood plain at the upper, dominated by lake level fluctuation. During the deposit of the LST in the intracraton basin, accommodation space is limited, and results in abundant fluvial sediment migration laterally, erosion and transport, forming laterally sandstone composite and aggradational deposit on the alluvial plain, which constitutes specific erosion unconformity boundary. | YANG MingHui LIU ChiYang ZHENG MengLin LAN ChaoLi TANG Xuan | 2007 | Science China Earth Sciences2007，50，z2： | 7 |
| 3 | Engineering Geological Study of the Active Tectonic Region for Hydropower Development on the Jinsha River,Upstream of the Yangtze River显示文摘The Jinsha River runs across the Hengduanshan north-south tectonic zone where neotectonism was relatively strong, accompanied by various geologic hazards. In this case, it seems necessary to make a quantitative assessment and grading of the engineering geological environment for the planning and development of hydropower projects on the Jinsha River.The studies of crustal structures and activities of neotectonic fault blocks provide a three-dimensional geomechan-ics model for us to make an assessment of the engineering geological environment. Based on the survey data and results from geologic hazard risk analysis, a hierarchical analysis model on the quality of the engineering geological environment is established with respect to the crustal stability, ground stability, and rock and soil mass stability. Nine factors relevant to the geological environment are selected and five levels are used for the quality grades: very bad, bad, mediocre, good, very good. The result indicates that active deep faults | WANG Sijing LI Guohe ZHANG Qiang LAN Chaoli | 2000 | Acta Geologica Sinica(English Edition)2000，74，2： | 2 |
| 4 | Ocean-Continent Subduction within the Paleotethyan Archiopeligic Ocean from Mineralogical Evidence of Muztag Ophiolite, Eastern Kunlun Mountain, China显示文摘Former studies show that the Muztag ophiolite, outcropped in the East Kunlun area of Xinjiang, formed in a supra-subduction zone environment. This study is to gain more information about the type of subduction zone. Through field work, thin section observation and microprobe analysis, petrological and mineralogical characteristics of the metamorphic peridotites of this ophiolite are obtained. Although the olivines of metamorphic peridotites appear in three textures of metamorphic relict, metamorphic recrystallizations and orthopyroxene-melting crystallizations by thin-section observations, they have stable and low Fo range of 87.8-89.5 by microprobe analysis. The orthopyroxenes show metamorphic relict and melting relict textures, with a low En of 88-90 and a wide range of Al2O3 content, from 2.90 wt% to 5.13 wt%. The spinels develop anhedral-subhedral textures, with Cr#(=Cr/(Cr+Al)) focusing on two ranges of 0.508-0.723 and 0.100-0.118, respectively. Based on these petrological and mineralogical observations, and combined with the era and tectonic setting for the Muztag ophiolite, it can be concluded that the ophiolite formed in a supra-subduction zone where the oceanic crust subducted down to the continental arc with a thick continental crust, and resulted from ocean-continent subduction within the Paleotethyan archiopelagic ocean in the East Kunlun area of Xinjiang. | Lan Chaoli Li Jiliang He Shunli | 2005 | Journal of China University of Geosciences2005，16，4： | 0 |
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