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1Deep seismic reflection profile across the juncture zone between the Tarim Basin and the West Kunlun Mountains显示文摘Fine structures of the crust and upper mantle of the basin-and-range juncture on the northwestern margin of the Qinghai-Tibetan Plateau are first delineated by the deep seismic reflection profile across the juncture zone between the Tarim Basin and the West Kunlun Mountains. Evidence is found for the northward subduction of the northwest marginal lithosphere of the Qinghai-Tibetan Plateau and its collision with Tarim lithosphere beneath the West Kunlun Mountains. The lithosphere image of the face-to-face subduction and collision determines the coupling relationship between the Tarim Basin and the West Kunlun Mountains at the lithosphere scale and reflects the process of continent- continent collision.GAO Rui HUANG Dongding LU Deyuan QIAN Guihua LI Yingkang KUANG Chaoyang Li Qiusheng LI Pengwu Feng Rujin Guan Ye 2000Chinese Science Bulletin2000,45,24:30
2Deep Background of Wenchuan Earthquake and the Upper Crust Structure beneath the Longmen Shan and Adjacent Areas显示文摘由越过 Longmen 掸人分析深地震的发出声音侧面,这篇论文集中于在 Longmen 掸人区域和 Wenchuan 地震的上面的外壳结构之间的关系的学习。Longmen 掸人戳带标记不仅地形学的变化,而且在东方西藏的高原和四川盆之间的侧面的速度变化。低速度的层一致地在西藏的高原的东方边下面在外壳中被发现了,并且在西方的四川盆下面结束。在在西藏的高原的东方边下面的 ∼20 km 的深度的低速度的层为赞成形成了大 Wenchuan 地震的精力累积被看作了深条件。LI Qiusheng GAO Rui WANG Haiyan ZHANG Jisheng LU Zhanwu LI Pengwu GUAN Ye HE Rizheng 2009Acta Geologica Sinica(English Edition)2009,83,4:11
3The thickness and structural characteristics of the crust across Tibetan plateau from active-sources seismic profiles显示文摘The Tibetan plateau as one of the youngest orogen on the Earth was considered as the result of continent-continent collision between the Eurasian and Indian plates.The thickness and structure of the crust beneath Tibetan plateau is essential to understand deformation behavior of the plateau.Active-source seismic profiling is most available geo-physical method for imaging the structure of the continental crust.The results from more than 25 active-sources seismic profiles carried out in the past twenty years were reviewed in this article.A preliminary cross crustal pattern of the Tibetan Pla-teau was presented and discussed.The Moho discontinuity buries at the range of 60-80 km on average and have steep ramps located roughly beneath the sutures that are compatible with the successive stacking/accretion of the former Cenozoic blocks northeastward.The deepest Moho(near 80 km) appears closely near IYS and the crustal scale thrust system beneath southern margin of Tibetan plateau suggests strong dependence on collision and non-distributed deformation there.However,the ~20 km order of Moho offsets hardly reappears in the inline section across northern Tibetan plateau.Without a universally accepted,convincing dynamic explanation model accommodated the all of the facts seen in controlled seismic sections,but vertical thickening and northeastern shorten of the crust is quite evident and interpretable to a certain extent as the result of continent-continent collision.Simultaneously,weak geophysical signature of the BNS suggests that convergence has been accommodated perhaps partially through pure-shear thickening accompanied by removal of lower crustal material by lateral escape.Recent years the result of Moho with ~7 km offset and long extend in south-dip angle beneath the east Kunlun oro-gen and a grand thrust fault at the northern margin of Qilian orogen has attract more attention to action from the northern blocks.The broad lower-velocity area in the upper-middle crust of the Lhasa block was once considered as resulted from partially melted rocks.However the low normal vP/vS ratio and the Moho stepwise rise fail to support significant partial melting in the middle-lower crust of the central-northern Tibetan plateau.Furthermore,the lower-velocity of crust occasionally disappears,and/or local thinned exhibits their non-stationary spatial distribution.Qiusheng Li Rui Gao Zhanwu Lu Ye Guan Jisheng Zhang Pengwu Li Haiyan Wang Rizheng He Marianne Karplus 2009Earthquake Science2009,22,1:5
4How to Select the Best Sensors for TDOA and TDOA/AOA Localization?显示文摘This paper focuses on the sensor subset optimization problem in time difference of arrival(TDOA) passive localization scenario. We seek for the best sensor combination by formulating a non-convex optimization problem, which is to minimize the trace of covariance matrix of localization error under the condition that the number of selected sensors is given. The accuracy metric is described by the localization error covariance matrix of classical closed-form solution, which is introduced to convert the TDOA nonlinear equations into pseudo linear equations. The non-convex optimization problem is relaxed to a standard semi-definite program(SDP) and efficiently solved in a short time. In addition, we extend the sensor selection method to a mixed TDOA and angle of arrival(AOA) localization scenario with the presence of sensor position errors. Simulation results validate that the performance of the proposed sensor selection method is very close to the exhaustive search method.Yue Zhao Zan Li Benjian Hao Pengwu Wan Linlin Wang 2019China Communications2019,16,2:3
5200-kg large explosive detonation facing 50-km thick crust beneath west Qinling,northeastern Tibetan plateau显示文摘It is difficult to acquire deep seismic reflection profiles on land using the standard oil-industry acquisition parameters. This is especially true over much of Tibetan plateau not only because of severe topography and rapid variation of both velocity and thickness of near-surface layer,but also strong attenuation of seismic wave through the thickest crust of the Earth. Large explosive sources had been successfully detonated in US,but its application in Tibetan plateau rarely has an example of good quality. Presented herein is the data of a 200-kg single shot we recorded in west Qinling,northeastern Tibetan plateau. The shot gather data with phenomenal signal-to-noise ratios illustrate the energy of the PmP phase. Although the observations are only limited to the northeastern Tibetan plateau and thus cannot comprise an exhaustive study,they nevertheless suggest that large explosions may be a useful exploration tool in Tibetan Plateau where standard seismic sources and profiling methods fail to produce adequate data of low crust.Qiusheng Li 2009Earthquake Science2009,22,4:3
6Basin-and Mountain-Building Dynamic Model of “Ramping-Detachment-Compression” in the West Kunlun-Southern Tarim Basin Margin显示文摘摘要:在西方 Kunlun-Tarim 盆范围连接带的变丑结构的分析显示在西南的 Tarim 消沉的沉积主要从西方 Kunlun 山被导出并且与时间,沉积的区域向北方日益增多地延长了。三 north-underthrusting (subducting ) ,陡峭蘸的、高速度的地区(身体) 在深度被认出,它对应于中央西方 Kunlun 连接带(由 Ke Jueluotage 范围跳了。三件样品(Z001-Z003 ) 在 Yandong pluton 的地上凿穿 ZK6301 从花岗石被拿;从比是的 pluton 年龄年轻得多的 97.0 ~ 87.6 妈的年龄范围在 334 点由 U-Pb 锆石标明日期 ????????? Y ?? 霈吗??CUI Junwen LI Pengwu GUO Xianpu DING Xiaozhong TANG Zhemin 2008Acta Geologica Sinica(English Edition)2008,82,2:3
7Thrust Propagation in the Aqqikkol Lake Area, the East Kunlun Mountains, Northwestern China显示文摘The western segment of the East Kunlun Mountains is one of the poorly studied regions in northwesternChina. Through a structural analysis of the typical sections, we have the following views: (1) There is a very welldeveloped fault system in the western segment of the East Kunlun Mountains and thrust propagation, normal slip anddecoupling are the chief deformation events in this area. (2) Although the thrusting started in the Late Carboniferous andLate Triassic-Early Jurassic, strong activity took place in the Miocene-Quaternary when the Kumkol basin was stronglydownwarped. (3) The tectonic pattern of coexistence of N-directed thrust propagation and S-directed normal slip in thisarea is consistent with the general tectonic pattern of the northern Qinghai-Tibet plateau and also very similar to that of theHimalayan region on the southern margin of the Qinghai-Tibet plateau, but their directions between the thrust propagationare opposite and all the strong thmst propagations occurred from the Miocene-Pliocene to Quaternary. a period featuringstrong collision between the Indian plate and the Eurasian plate and abrupt uplift of the Qinghai-Tibet plateau. Thisoppositely directed thrust propagation and normal slip reveal such kinematic characteristics as symmetric propagations ofdeep-seated materials towards the north and south beneath the Qinghai-Tibet plateau and gravitational sliding ofsuperficial materials towards the interior of the plateau. Therefore, the establishment of the fault system in the study areamay provide an approach to the study of deep processes of the northern Qinghai-Tibet plateau and the construction of aunified geodynamic model for the uplift of the Qinghai-Tibet plateau.CUI Junwen, CHEN Wen, LI Pengwu, ZHANG Xiaowei and LI Li Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037 2003Acta Geologica Sinica(English Edition)2003,77,4:2
8Paleomagnetic analysis of eastern Tibet: Implications for the collisional and amalgamation history of the Three Rivers Region, SW China 显示文摘Li Pengwu Gao Rui Cui Junwen Guan Ye 2004J Asian Earth Sci2004,24,3:1
9The dual roles of oxodiperoxovanadate both as a nucleo- phile and an oxidant in the green oxidation of benzyl alcohols or benzyl halides to aldehydes and ketones 显示文摘LI Chunbao ZHENG Pengwu LI Jie 2003Angewandte Chemie-International Edition2003,42,41:1
10Wellbore breakouts of the main borehole of Chinese Continental Scientific Drilling(CCSD) and determina- tion of the present tectonic stress state 显示文摘CUI JUN-WEN WANG LIAN-JIE LI PENGWU 2009Tectono- physics2009,475,2:1
11Estimation of shortening between the Siberian and Indian plates since the Early Cretaceous 显示文摘LI PENGWU CUI JUNWEN LI LI 2002Journal of Asian Earth Sciences2002,20,3:1
12CPSDv0: a forest stand structure database for plantation forests in China显示文摘Forest stand structure is not only a crucial factor for regulating forest functioning but also an important indicator for sustainable forest management and ecosystem services.Although there exists a few national/global structure databases for natural forests,a country-wide synthetic structure database for plantation forests over China,the world’s largest player in plantation forests,has not been achieved.In this study,we built a country-wide synthetic stand structure database by surveying more than 600 peer-reviewed literature.The database covers tree species,mean stand age,mean tree height,stand density,canopy coverage,diameter at breast height,as well as the associated ancillary in-situ topographical and soil properties.A total of 594 pub-lished studies concerning diverse forest stand structure parameters were compiled for 46 tree species.This first synthesis for stand structure of plantation forests over China supports studies on the evolution/health of plantation forests in response to rapid climate change and intensified disturbances,and benefits country-wide sustainable forest management,future afforestation or reforestation planning.Potential users include those studying forest community dynamics,regional tree growth,ecosystem stability,and health,as well as those working with conservation and sustainable management.This dataset is freely acces-sible at http://gffzza4c772bdab62464fhxoo5bn0p9qnn665o.ffgz.tsg.suse.edu.cn/10.11922/sciencedb.j00076.00091.Xiuchen Wu Xiaofei Jiang Hongyan Liu Craig Allen Xiaoyan Li Pei Wang Zongshan Li Yuting Yang Shulei Zhang Fangzhong Shi Jiaojun Zhu Pengtao Yu Mei Zhou Pengwu Zhao Yanhui Wang Chao Yue Deliang Chen 2023Big Earth Data2023,7,1:0
13Structural Characteristics of the Basement beneath Qiangtang Basin in Qinghai-Tibet Plateau: Results of Interaction Interpretation from Seismic Reflection/Refraction Data显示文摘The studies on configuration, character/property of the basement of Qiangtang basin is helpful for evaluating petroleum and nature gas resources as well as understanding the basin evolvement. Recently a moderate to high-grade metamorphic gneiss rock was found underlying beneath very low metamorphic Ordovician strata in Mayer Kangri to the north of the central uplift. That fact actually proved existence of the crystalline basement just the distribution and structures of pre-Paleozoic crystalline basement still remain puzzle. In recent years a number of active sources deep seismic profiling, to aim at lithospheric structure of northern Tibet and petroleum resources of the Qiangtang basin, had been conducted that make it possible to image the structure of the basement of the Qiangtang. Near vertical reflection profiles, included those acquired previously and those during 2004 to 2008, have been utilized in this study. By through the interaction process and interpretation between the reflection profiles and the wide-angle profile, a model with the detailed structure and velocity distribution from surface to the depth of 20 km of Qiangtang basin has been imaged.Based on the results and discussions of this study, the preliminary conclusions are as follows: (1) The velocity structure section (~20 km) that is interactively constrained by the refraction and reflection seismic data reveals that the sedimentary stratum gently lie until 10 km in the south Qiangtang basin. (2) The basement consists of fold basement (the upper) and crystalline basement (the lower).The fold basement buried at the average depth of 6 km with a velocity of 5.2-5.8 km/s. The shallowest appear at range of the central uplift. The crystalline basement is underlying beneath the fold basement at the average depth of 10 km with a velocity of 5.9-6.0 km/s except near Bangong-Nujiang suture. (3) The high-velocity body at the depth range of 3-6 km of the central uplift is considered as a fragment of the crystalline basement that perhaps was raised by Thermal or deformation. (4) The lower-consolidated fold basement show more affinity of Yangtze block but the crystalline basement seems more approximate to Lhasa terrene in geophysical nature. We have attempted to improve the resolution and reliability by interaction of the active seismic data and prove it effective to image complex basement structure. It will be a potential to process the piggy-back acquisition data and has wide prospects.LI Qiusheng GAO Rui FENG Shaoying LU Zhanwu HOU Hesheng GUAN Ye LI Pengwu WANG Haiyan YE Zhuo XIONG Xiaosong LIU Jinkai HE Rizheng 2013Acta Geologica Sinica(English Edition)2013,87,2:0
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