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Influences of the Wenchuan Earthquake on Sediment Supply of Debris Flows

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Journal of Mountain Science 2011年第2期8卷 270-277页

作者： ZHU Jing DING Jun LIANG Jingtao State Key Laboratory of Geohazard Prevention and Geoenvironment Protection Chengdu University of Technology Chengdu 610059 China

The 5.12 Wenchuan Earthquake and the subsequent rainstorms induced a large number of landslides, which later were transformed into debris flows. To evaluate the effect of the earthquake on the sediment supply of debris flows, eight debris flow basins near Beichuan City, Sichuan Province, China were chosen as the study area. The area variations of the debris flow source after the Wenchuan Earthquake and the subsequent rainstorm are analyzed and discussed in this paper. Interpretations of aerial photographs (after the 5.12 Wenchuan Earthquake) and SPOT5 images (after the rainstorm event of September 24, 2008) as well as field investigations were compared to identify the transformation of landslide surface in the study area, indicating that the landslide area in the eight debris flow basins significantly increased. The loose sediment area on the channel bed increased after the rainstorm event. In order to estimate the relationship of the landslide area with the rainfall intensity in different return periods, a model proposed by Uchihugi was adopted. Results show that new landslide area induced by heavy rainfall with 50-year and 100-year return period will be 0.87 km2 and 1.67 km2, respectively. The study results show the Wenchuan earthquake had particular influences on subsequent rainfall-induced debris flow occurrence.

关键词： Wenchuan earthquake Debris flow Rainstorm Remote sensing imagery

Distribution and Elimination of Lead Species in Soils Related to GAP of Chinese Medicinal Materials of Ligusticum Chuanxiong Hort

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地球科学进展 2004年第S1期19卷 419-423页

作者： DENG Tian-long~(1,2),JIA Min-ru~2,LIAO Meng-xia~1 (1. College of Materials and Bioengineering, chengdu University of Technology, chengdu 610059, China 2. College of Pharmacology, chengdu University of Traditional Chinese Medicine, chengdu 610059 ,China)

In this paper, the sequential extraction procedure was used for the selection of fractions of lead in seven stages corresponding to lead exchangeable, lead bounded to carbonates, to manganese oxides, to organic matters, to amorphous iron, and lead associated to crystallized iron, and to residuals. The vertical distributions of lead species were carried out in the soils related to good agriculture progress (GAP) of Chinese medical materials of Ligusticum chuanxiong Hort in Dujiangyan city and Wenchuan Co...

关键词： Chinese medical Materials Phytoremediation Soils Lead speciation

MARINE SOURCE ROCKS AND THEIR DEPOSITIONAL CONDITIONS OF MESOZOIC—CENOZOIC IN THE GAMBA—TINGRE BASIN,SOUTH TIBET:ORGANIC GEOCHEMICAL STUDY

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地学前缘 2000年第S1期7卷 423-425页

作者： Hu Xiumian,Wang Chengshan,Li Xianghui[WT5,5”BX](Institute of Sedimentary Geology, chengdu University of Technology, chengdu 610059, China)

The Gamba—Tingri basin lies in south Tethys Himalaya subzone. It is 400km in length from east to west, and 30～50km in width from north to south. The basin is mainly made up of marine Mesozoic and Lower Cenozoic, i.e., Jurassic, Cretaceous, and Lower Tertiary. Its total strata are more than 3100m in thickness. The passive continental margin of the India plate developed during Jurassic—Cretaceous after a Triassic rifting stage. Collision took place between the India and the Eurasian plate during the latest Cretaceous and earliest Tertiary (Liu and Einsele, 1994), which resulted in a Tertiary residual *** Jurassic stratigraphic system in the Gamba—Tingri basin were not carried out until recently (Wan et al., 1999), which is divided into three formations, i.e.., Pupuga Fm., Nieniexiongla Fm., and Menkadun Fm.. The Cretaceous and Tertiary stratigraphic system is after Wan (1985) and Xu et al.(1990), which the Cretaceous is divided into six formations: Dongsan Fm., Chaqiela Fm., Lengqingle Fm., Xiawuchubo Fm., Jiubao Fm., and Zongshan Fm, whereas the Tertiary is divided into Jiabula Fm. Zongpu Fm., and Zhepure Fm.

关键词： marine source rocks depositional conditions Mesozoic Cenozoic organic geochemical study South Tibet

GEOMORPHIC EVIDENCES FOR CENOZOIC UPLIFT IN THE EASTERN MARGIN OF QINGHAI—TIBET PLATEAU

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地学前缘 2000年第S1期7卷 277-278页

作者： Li Yong,Hou Zhongjian,Si Guangying[WT5,5”BX](Institute of Sedimentary Geology, chengdu University of Technology, chengdu 610059,China)<

The uplift history has been becoming the key for the geological science of Qinghai—Tibet plateau. The scholars abroad have reconstructed uplift history of the plateau by studying geological process of the inner globe, they considered that the altitude of the plateau got up to the maximum at 14Ma (*** et al, 1995; *** et al, 1993)or the plateau got to the present elevation at about 8Ma (***,1992). The Chinese geologists make use of substitutes of outer environmental elements to deduce that the uplift of Qinghai—Tibet plateau began from 3 4Ma(Li Jijun,1995). It is obvious that there are the different views and controversies about the plateau uplift history.

关键词： geomorphic evidences Cenozoic uplift Qinghai—Tibet Plateau Western Sichuan

THE TERTIARY STRATIGRAPHIC SEQUENCE OF YANYUAN BASIN IN THE SOUTHEASTERN MARGIN OF THE QINGHAI—TIBET PLATEAU

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地学前缘 2000年第S1期7卷 304-305页

作者： Si Guangying,Li Yong,Hou Zhongjian[WT5,5”BX](Institute of Sedimentary Geology, chengdu University of Technology, chengdu 610059,China)

The Cenozoic Yanyuan basin is located in the huge Longmenshan—Jinpingshan nappetectonic belt along the eastern margin of the Qinghai—Tibet plateau. The basin is the largest and the best\|preserved intraorogenic basin above 2300m *** basin has deposited different kinds of sediments with 1600m in depth. The early Tertiary strata were first named as Lijiang formation in 1961, and later named as Hongyanzi formation. The later Tertiary strata, the lignite\|bearing strata, were once named as Xigeda formation. Li Yougheng(1978) found some mammal fossils in the strata, so they named it Yanyuan formation. The Hongyanzi Formation which thickness is 1022m can be divided into five members according to the lithologic characters. The first one is mainly made of purplish\|red coarse conglomerates. The composition of gravel mainly consists of limestone and purplish\|red sandstone and marl. The second one consists of sandstone interbedded with conglomerate. The member has three cyclic sequences from conglomerate to sandstone. The composition of gravel of this member is mainly limestone. From bottom to top the degree of sorting and roundness tends to be well. In sandstones or sand lenticules the oblique bedding and trough cross\|bedding can be seen. The third one is the member of sandstone and mudstone. The sandstone is light purple while the mudstone is purplish red. Ripple marks can be seen in the sandstone. The forth one consists of conglomerate interbedded with mudstone, The conglomerate and the sandstone assume three cyclic sequences. The composition of the gravel is chiefly limestone. The fifth one is a member of light purple massive conglomerate. The composition of the gravel is limestone. The imbricate structure can be seen in the conglomerate. The strata belong to later Eocene epoch in accordance with the fossils of mammals, plants and ostracoda in it.

关键词： stratigraphic sequence tertiary Yanyuan basin Qinghai —Tibet plateau

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辽河盆地下第三系砂岩储层的敏感性研究

矿物岩石 1997年第1期17卷 77-84页

作者： Zheng Rongcai (Institute of Sedimentary Geology,chengdu University of Technology,chengdu 610059) 成都理工学院沉积所四川成都 610059

通过对辽河盆地下第三系砂岩储层的速敏、水敏和酸敏实验，发现造成该区砂岩储层渗透率损害的主要原因与水敏有关，其次为速敏，而酸敏不严重。认为提高钻井液的矿化度和适当的酸化处理。

关键词：油气藏砂岩储集层敏感性

同时计算实序列的DFT和实序列的DFT的IDFT的新公式

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上海交通大学学报 2008年第12期42卷 2052-2055页

作者：范安东成都理工大学信息管理学院成都610059

通过对离散傅里叶变换(DFT)的一些性质的分析,利用DFT的对称性和将一个复序列分解为4个奇偶序列之和的方法,改正了Gunther关于直接计算双实序列的DFT和实序列的DFT和逆离散傅里叶变换(IDFT)的公式中的少数错误,给出了新的同时计算实序列... 详细信息

通过对离散傅里叶变换(DFT)的一些性质的分析,利用DFT的对称性和将一个复序列分解为4个奇偶序列之和的方法,改正了Gunther关于直接计算双实序列的DFT和实序列的DFT和逆离散傅里叶变换(IDFT)的公式中的少数错误,给出了新的同时计算实序列的DFT和实序列的DFT的IDFT的直接公式,并给出了证明.

关键词：对称性离散傅里叶变换逆离散傅里叶变换

THE PALEOCURRENT PATTERN OF EARLY TERTIARY REDBEDS IN THE HOH XIL BASIN,NORTHERN TIBET PLATEAU:IMPLICATIONS FOR AN EARLY UPLIFT AND UNROOFING

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地学前缘 2000年第S1期7卷 198-199页

作者： Yi Haisheng, Wang Chengshan,Lin Jinhui, Zhu Lidong, Liu Dengzhong, Huang Jijun[WT5,5”BX](chengdu University of Technology,chengdu 610059,China)

We focus on early Cenozoic uplift, erosion and growth of northern Tibet plateau by reconstructing paleo\|drainage pattern in the Hoh Xil basin. Stratigraphical infilling sequences and lithic type orogenic basins are determined largely by contemporaneous tectonic activity. It is therefore reasonable to infer that paleoflow variability record give useful information about regional tectonic events. We now report paleocurrent data from outcrop measurement of 4 expedition profiles across the basin during 1997—*** west\|east trending Hoh Xil basin is the largest redbeds basin in northern Tibet plateau. It is 400km in axial length and has maximum width of 200km, which extends along Jin zone, separated the Qiangtang from the Bayankara block. It accommodates more than 5000m of terrestrial sediments during the Eocene to Oligocene dated by preliminary magnetostratigraphy and minor *** sedimentological observation and lithic facies associations analysis of the Eocene Fenghuoshan Group show to have evolved vertically from alluvial fan system in the lowest part, into stacked megasequences of coarsening\|upward fan\|delta system in the middle and upper part. The braided fluvial conglomeratic deposits occur at intervals along the basin margin and grade basin ward interbedded sandstone and mudstone. The Oligocene Yaxicuo Group is locally present and forms as laterally elongate sub\|basins, which is of a maximum thickness of 2000m, as seen in the Wudaoliang and the Hantaishan area. Alluvial fan associations in this sub\|basin in the proximal part adjacent to the southern faulted border and prograded northward to floodplain in distal part.

关键词： paleocurrent pattern early Tertiary redbeds uplift e rosion Hoh Xil Northern Tibet

SEDIMENTARY　AND　TECTONIC　EVOLUTION　OF　THE　LONGMENSHAN　FORELAND　BASIN，WESTERN　SICHUAN，CHINA

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Scientia Geologica Sinica 1994年第4期 377-387页

作者： Zeng Yunfu and Li Yong(Institute of Sedimentology, chengdu College of Science and Engineering, chengdu 610059)

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