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Coal-Forming Model in the Context of Non-marine Sequence Stratigraphy:A Case Study of Jurassic Coal Measures in Northern Qaidam Basin,Northwestern china

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地学前缘 2009年第S1期16卷 128-129页

作者： Jing Lu~1,Longyi Shao~1,Taijin Liu~2.Qi Ju~2.Huaijun Wen~2.Hao Wang~1 1.Department of Resources and Earth sciences,china University of Mining and Technology({2.),{2. 100083,china. 2.Qinghai Administration of Coal Geology,Xining 810000,china

Previous studies of coal sequence stratigraphy have concentrated on coals associated with paralic depositional *** attention has been paid to their counterparts in non-marine intra-mountain coal *** northern Qaidam Basin of northwestern china has been extensively developed with abundant oil and gas as well as coal resources in its Jurassic non-marine successions.A total of six sedimentary systems of the Early and Middle Jurassic

关键词： northern Qaidam Basin Jurassic depositional environment sequence stratigraphy coal accumulation

CENOZOIC DISPLACEMENT HISTORY OF THE ALTYN TAGH FAULT:GEOLOGICAL EVIDENCE FROM FIELD OBSERVATIONS IN SOUERKULI AND MANGAR REGIONS, NW china

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地学前缘 2000年第S1期7卷 210-211页

作者： Zhang Yueqiao 1, Chen Zhengle 1, Z.Washburn 2. Wang Xiaofeng 1, J. R.Arrowsmith 2.1 The institute of Geomechanics, chinese {2. of Geological sciences, beijing 100081, china 2.Department of Geology, Arizona State University, Tempe, AZ, 852.7,USA

The ENE\|striking Altyn Tagh Fault (ATF) has been well known as a large, active left\|lateral strike\|slip fault that bounds the thrusting systems in NE *** fault has been the focal point in the debate between the discrete extrusion vs. distributed crustal shortening models. Although its active left\|lateralstrike\|slip features have been largely investigated and well documented by both satellite imagery and air\|photo interpretations and field observations, little study has been done upon its Cenozoic displacement history. Questions about the age of initiation and total offset accumulated on the fault remain controversial. A key area to resolve such question is located along the central segment of the fault in the Souerkuli and Mangar regions, where Neogene sedimentary basins well develop and are mostly distributed in three zones, namely from east to west: the Gobiling, Yitunbulak and Yusuale Tagh (Fig.1). Our field investigations were conducted along the ATF cutting the Yitunbulak and Gebiling Neogene sedimentary basins. Two stratigraphic unconformities observed within this Neogene conglomeratic series allow a separation of three major stratigraphic sequences and record the initiation and major deformational episodes of ATF during Cenozoic. An early stratigraphic unconformity occurred between a yellow depositional series below and early Pliocene red\|colored conglomeratic mudstones above. A later stratigraphic unconformities occurred between early and late Pliocene sedimentary series. The lower series below the early stratigraphic unconformities is mainly composed of a conglomeratic rocks containing cobbles and pebbles of basement rock units (mostly mylonitic granites, limestones and quartzes); this series has been poorly mapped and dated; its age could be assigned to late Oligocene to early Miocene; this series tilts to NW with an angle of about 30° and is overlain in angular unconformity by early Pliocene pebble\|sized conglomerates. A weathering zone on

关键词： left\|lateral offset Cenozoic Altyn Tagh fault

AGE OF THE ALTYN TAGH STRIKE—SLIP FAULT

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地学前缘 2000年第S1期7卷 208-209页

作者： Li Haibing 1, Yang Jingsui 1, Xu Zhiqin 1, Wu Cailai 1, Zhang Jianxin 1, Wan Yushen 1, Shi Rendeng 1, Juhn G. Liou 2.Trevor R. Ireland 2.(1 institute of Geology, chinese {2. of Geological sciences, beijing 100037, china 2.Department of

A 100～500m\|wide mylonite zone in the Altun Group of Lower Proterozoic age was discovered along the Altyn Tagh strike\|slip fault. The zone is mainly composed of amphibolitic and granitic mylonites. The planar joints of the rocks strike in NE70 and dip steeply (nearly vertical), coincident with the striking of Altyn Tagh fault zone, and their stretched lineations are nearly horizontal. Shear strains are well developed and show sinistral sheared. The amphibolitic and granitic mylonites are most probably the products of deep\|seated melting caused by sinistral strike\|slip shearing as suggested by the evidence below: (1) The migmatization is intensely developed and spatially controlled by the shear zone, and the rock has a set of NNE perspective foliation which is in accord with the direction of the Altyn Tagh strike\|slip fault zone. (2. The recrystallized hornblende aggregate is distributed in band with obvious nebulous texture, indicating the characteristics of anatexis, and the hornblendes are oriented and form the nearly horizontal stretching lineation; some hornblendes have titanite inclusions, and magmatic long\|columnar zircons are in directional arrangement.(3) The banded felsic material is developed, and the plagioclase is characteristic of high\|temperature plastic deformation and shows sinistral shear stain. (4) In mylonites, all the axis C fabric of quartz shows the feature of sinistral shearing and the majority is generally middle to low temperature fabric, but there also exists high temperature fabric, which suggests that high temperature shearing occur in the early stage of strike\|slip deformation and it is characterized by middle to low temperature shearing at the beginning of anatexis or in the late stage of the deformation. (5) On the XZ plane of mylonite and mylonitized rocks, there exists the consistent sinistral shear stain, which suggests the products of the same strike\|slip *** were separated from three samples of mylonitized gra

关键词： Altyn Tagh fault Tibet plateau SHRIMP dating mylonite

TAKE ANOTHER VISION TO THE UPLIFT OF THE QING—ZANG (TIBETAN) PLATEAU BASED ON CENOZOIC VOLCANISM

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地学前缘 2000年第S1期7卷 370-371页

作者： Liu Jiaqi [WT5,5”BX](institute of Geology and Geophysics,{2.,beijing 10002., china)

The emergence of the Qing—Zang plateau is among the most important geological events on the globe since the Cenozoic Era. Many geological issues can find answer from here. The major issues concerning plateau probably have three: (1) geodynamics, timing and speed of the plateau uplift;(2. The plateau uplift impact on surrounding environment;(3) mineral resources in the plateau. The authors want to focuses on first issue based on volcanisms occurred in interior and surrounding of the plateau, The new opinions are following:(1) Each volcanic eruptive episode corresponded to strong uplift stage;(2. The dynamic mechanism of the plateau uplift can not ignore another force from west beyond collision between Indian and Eurasia plates from South;(3) The surrounding volcanic chain is not only related to the collision from South, but also from west.

关键词： Tibetan plateau the Cenozoic volcanism volcanic chain surro unding plateau west collision uplift mechanism

Sedimentary Facies and Coal Accumulation of the Northern Type Longtan Formation in Central Hunan,Southern china

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地学前缘 2009年第S1期16卷 155-156页

作者： Congwei Ji~1,Zhineng Li~2.Zhengqi Peng~2.Chao Zhang~1,Longyi Shao~1 1.Department of Resources and Earth sciences,china University of Mining and Technology({2.),{2. 100083,china. 2.Hunan Administration of Coalfield Geology,Changsha 411114,china

The northern type Longtan Formation of the Late Permian in central Hunan is dominated by an assemblage of greyish black mudstone,siltstone, sandy mudstone,fine sandstone and coals,and contains a variety of sedimentary... 详细信息

关键词： central Hunan sedimentary facies coal accumulation Longtan Formation

FORMATION AND EUOLUTION OF TETHYS IN THE TIBETAN PLATEAU

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地学前缘 2000年第S1期7卷 334-335页

作者： Pan Yusheng[WT5,5”BX](institute of Geology and Geophysics, {2., beijing 10002.,china)

The formation of the Tibetan Plateau is closely related to the evolution of Tethys. There have been many researchers and articles concerning the Tethys since *** proposed the concept in 1893. It means a large ocean which lies between Eurasia and Gondwanaland. With the development of Tethyan research, some new terms, appeared such as Neo\|Tethys, Paleo\|Tethys, and Proto\|Tethys, representing the Tethys in Mesozoic—Cenozoic, late Paleozoic and early Paleozoic respectively. The trace of an ocean from Sinian to Ordovician was discovered during the scientific expedition and Proto\|Tethys was proposed to name the ocean. Therefore, the Tibetan Plateau is the main scope of the Eastern Tethys. It can be divided c losely related into three zones which represent the main oceanic locations in th ree different *** Northern Tethyan Region lies in the Kunlun and Qilian Mountains, its remnant is the Fifth Suture Zone. It is also the northern boundary of the Tibetan Plateau The rift initiated after the continental basement had been formed in Sinian and gradually developed into an ocean, which was named Proto\|Tethys, the earliest Tethyan ocean known up to now. The petrochemical compositions of pillow lava in this zone show the characteristics of mid\|ocean ridge tholeiite basalt and the pelagic ophiolitic flysch were well developed, indicating a matured ocean. It was closed in Ordovician and Silurian.

关键词： formation and evolution Tethys Tibetan plateau suture zone structural deformation Gondwana land

Research progress of the NSFC Major Research Plan “Dynamic Disaster Evolution of Major Engineering Structures”

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Science china(Technological sciences) 2010年第2期53卷 592-594页

作者： RU JiPing1, LI DaPeng1, LI ZhongXian2.1 Department of Engineering & Materials Science, NSFC, beijing 100085, china 2.School of Civil Engineering, Tianjin University, Tianjin 300072. china Department of Engineering & Materials Science NSFC Beijing China School of Civil Engineering Tianjin University Tianjin China

The NSFC Major Research Plan aims to conduct researches at the international research frontiers on modeling of strong earthquake ground motions and strong wind or typhoon fields, and investigating the damage and failure evolution process of the major engineering structures under dynamic actions, focusing on the following two key scientific problems: (1) characteristics and laws of strong earthquake ground motions and strong wind or typhoon fields, and (2. process and mechanism of dynamic disaster evolution of the major engineering structures. For these goals, the research work is targeted at (1) modeling and predicting of strong earthquake ground motion and strong wind or typhoon fields, (2. identifying critical parameters influencing the dynamic disaster evolution of the major engineering structures, (3) analyzing the whole dynamic disaster evolution process of the major engineering structures, and (4) integration and verification of simulation systems for dynamic disaster evolution of the major engineering structures.

关键词： major engineering structures dynamic disaster evolution research progress

Assessment on Temperature Changes of china During the Past 2.00 Years

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地学前缘 2009年第S1期16卷 98-99页

作者： Zhixin Hao,Quansheng Ge,Jingyun Zheng,Xuemei Shao institute of Geographic sciences and Natural Resources Research,{2.,beijing 10002.,china.

The Fourth Assessment Report of IPCC(IPCC AR4)concluded that average Northern Hemisphere temperatures during the second half of the 2.th century were very likely higher than that of any other 50-year period in the last 500 years and likely the highest in at least the past 1300 ***,after evaluating Global or Northern Hemisphere temperature change series derived from ice cores,tree rings,

关键词： climate change china past 2.00 years multi-proxy data

Boosting performance in attack intention recognition by integrating multiple techniques

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frontiers of Computer Science 2011年第1期5卷 109-118页

作者： Hao Bai (1) david_xiaobai@*** Kunsheng Wang (2. Changzhen Hu (1) Gang Zhang (2. Xiaochuan Jing (2. beijing Inst Technol Sch Comp Sci & Technol Beijing 100081 Peoples R China china Aerosp Engn Consultat Ctr Beijing 100048 Peoples R China

Recognizing attack intention is crucial for security analysis. In recent years, a number of methods for attack intention recognition have been proposed. However, most of these techniques mainly focus on the alerts of an intrusion detection system and use algorithms of low efficiency that mine frequent attack patterns without reconstructing attack paths. In this paper, a novel and effective method is proposed, which integrates several techniques to identify attack intentions. Using this method, a Bayesian-based attack scenario is constructed, where frequent attack patterns are identified using an efficient data-mining algorithm based on frequent patterns. Subsequently, attack paths are rebuilt by recorrelating frequent attack patterns mined in the scenario. The experimental results demonstrate the capability of our method in rebuilding attack paths, recognizing attack intentions as well as in saving system resources. Specifically, to the best of our knowledge, the proposed method is the first to correlate complementary intrusion evidence with frequent pattern mining techniques based on the FP-Growth algorithm to rebuild attack paths and to recognize attack intentions.

关键词： attack path attack intention compensatoryintrusion evidence FP-Growth