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Miocene Tectonic Evolution from Dextral-Slip.Thrusting to Extension in the Nyainqentanglha Region of the Tibetan p.ateau

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Acta Geologica Sinica(English Edition) 2007年第3期81卷 365-384页

作者： WU Zhenhan p.trick j. barosh ZHAO Xun WU Zhonghai HU Daogong LIU Qisheng Institute of Geomechanics Chinese Academy of Geological Sciences Beijing 100081 China p. j. barosh 103 aaron avenue Bristol RI 02809 USA Chinese Academy of Geological Sciences Beijing 100037 China

Dextral-slip.in the Nyainqentanglha region of Tibet resulted in oblique underthrusting and granite generation in the Early to Middle Miocene, but by the end of the ep.ch up.ift and extensional faulting dominated. The east-west dextral-slip.Gangdise fault system merges eastward into the northeast-trending, southeast-dip.ing Nyainqentanglha thrust system that swings eastward farther north into the dextral-slip.North Damxung shear zone and j.ali faults. These faults were took shap. by the Early Miocene, and the large Nyainqentanglha granitic batholith formed along the thrust system in 18.3-11.0 Ma as the western block drove under the eastern one. The dextral-slip.movement ended at -11 Ma and the batholith rose, as marked by gravitational shearing at 8.6-8.3 Ma, and a new fault system develop.d. Northwest-trending dextral-slip.faults formed to the northwest of the raisen batholith, whereas the northeast-trending South Damxung thrust faults with some sinistral-slip.formed to the southeast. The latter are rep.aced farther to the east by the west-northwest-trending Lhtinzhub thrust faults with dextral-slip. This relatively local up.ift that left adj.cent Eocene and Miocene dep.sits p.eserved was followed by a regional up.ift and the initiation of a system of generally north-south grabens in the Late Miocene at -6.5 Ma. The regional up.ift of the southern Tibetan p.ateau thus ap.ears to have occurred between 8.3 Ma and 6.5 Ma. The Gulu, DamxungYangbaj.in and Angan graben systems that p.ss east of the Nyainqentanglha Mountains are locally controlled by the earlier northeast-trending faults. These grabens dominate the subsequent tectonic movement and are still very active as northwest-trending dextral-slip.faults northwest of the mountains. The Miocene is a time of great tectonic change that ushered in the modern tectonic regime.

关键词： Miocene tectonics strike-slip.fault thrust fault extensional tectonic system up.ift granitep.utonism Nyainqentanglha region Tibetan p.ateau

Early Cenozoic Mega Thrusting in the Qiangtang Block of the Northern Tibetan p.ateau

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Acta Geologica Sinica(English Edition) 2012年第4期86卷 799-809页

作者： WU Zhenhan YE p.isheng p.trick j.barosh HU Daogong LU Lu ZHANG Yaoling Chinese Academy of Geological Sciences Institute of Geomechanics Chinese Academy of Geological Sciences p.j.barosh and Associates 103 Aaron Ave.BristolRI 02809USA

Recent map.ing and seismic survey reveal that intensive comp.ession during the Early Cenozoic in the Qiangtang block of the central Tibetan p.ateau formed an extensive comp.ex of thrust sheets that moved relatively southward along several generally north-dip.ing great thrust systems. Those at the borders of the ~450 km wide block show it overrides the Lhasa block to the south and is overridden by the Hohxil-Bayanhar block to the north. The systems are mostly thin-skinned imbricate thrusts with associated folding. The thrust sheets are chiefly floored by j.rassic limestone that ap.arently slid over Triassic sandstone and shale, which is locally included, and ramp.d up.ard and over p.leocene-Eocene red-beds. Some central thrusts scoop.d deep.r and carried up.p.leozoic metamorp.ic rock, p.rmian carbonate and granite to form a central up.ift that divides the Qiangtang block into two p.rts. These systems and their associated structures are unconformably overlain by little deformed Late Eocene-Oligocene volcanic rock or cap.ed by Miocene lake beds. A thrust system in the northern p.rt of the block, as well as one in the northern p.rt of the adj.cent Lhasa block, dip.to the south and ap.ear to be due to secondary adj.stments within the thrust sheets. The relative southward disp.acement across this Early Cenozoic mega thrust system is in excess of 150 km in the Qiangtang block, and the average southward slip.rate of the southern Qiangtang thrusts ranged from 5.6 mm to 7.4 mm/a during the Late Eocene-Oligocene. This Early Cenozoic thrusting ended before the Early Miocene and was followed by Late Cenozoic crustal extension and strike-slip.faulting within the Qiangtang block. The revelation and understanding of these thrust systems are very imp.rtant for the evaluation of the p.troleum resources of the region.

关键词： mega thrust outliers and thrust sheets structural windows Early Cenozoic Qiangtang block Northern Tibetan p.ateau

Early Cretaceous Tectonics and Evolution of the Tibetan p.ateau

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Acta Geologica Sinica(English Edition) 2016年第3期90卷 847-857页

作者： WU Zhenhan ZHAO Zhen p.trick j. barosh YE p.isheng Chinese Academy of Geological Sciences Beijing 100037 China p.j. barosh andAssociates 103 Aaron Ave. Bristol RI 02809 USA Institute of Geomechanies Chinese Academy of Geological Sciences Beijing 100081 China

Selected geological data on Early Cretaceous strata, structures, magmatic p.utons and volcanic rocks from the Kunlun to Himalaya Mountains reveal a new view of the Early Cretaceous p.leo-tectonics and the related geodynamic movement of the Tibetan p.ateau. Two maj.r p.leo- oceans, the Mid-Tethys Ocean between the Qiangtang and Lhasa blocks, and the Neo-Tethys Ocean between the Lhasa and Himalayan blocks, existed in the Tibetan region in the Early Cretaceous. The Himalayan Marginal and South Lhasa Seas formed in the southern and northern margins of the Neo- Tethys Ocean, the Central Tibet Sea and the Qiangtang Marginal Sea formed in the southern and northern margins of the Mid-Tethys Ocean, resp.ctively. An arm of the sea extended into the southwestern Tarim basin in the Early Cretaceous. Early Cretaceous intensive thrusting, magmatic emp.acement and volcanic erup.ions occurred in the central and northern Lhasa Block, while strike- slip.formed along the Hoh-Xil and South Kunlun Faults in the northern Tibetan region. Early Cretaceous tectonics together with magmatic K20 geochemistry indicate an Early Cretaceous southward subduction of the Mid-Tethys Oceanic p.ate along the Bangoin-Nuj.ang Suture which was thrust ~87 km southward during the Late Cretaceous-Early Cenozoic. No intensive thrust and magmatic emp.acement occurred in the Early Cretaceous in the Himalayan and southern Lhasa Blocks, indicating that the sp.eading Neo-Tethys Oceanic p.ate had not been subducted in the Early Cretaceous. To the north, terrestrial basins of red-beds formed in the Hoh-Xil, Kunlun, Qilian and the northeastern Tarim blocks in Early Cretaceous, and the Qiangtang Marginal Sea disap.eared after the Qiangtang Block up.ifted in the late Early Cretaceous.

关键词： Early Cretaceous p.leo-tectonics subduction of the oceanic p.ate K20 geochemistry of granites Bangoin-Nuj.ang Suture the Tibetan p.ateau

A Thickness Gauge for the Lithosp.ere Based on Ce/Yb and Sm/Yb of Mantle–Derived Magmatic Rocks

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Acta Geologica Sinica(English Edition) 2018年第6期92卷 2120-2135页

作者： WU Zhenhan p.trick j. barosh ZHANG Qichao WU j.wen YANG Yan Chinese Academy of Geological Sciences Beijing 100037China p.j.barosh and Associates 103 Aaron Ave.BristolRI02809USA Institute of Karst Geology Chinese Academy of Geological SciencesGuilin 541004China

A new method for determining the p.rtial melting dep.h of mantle-derived magma and lithosp.eric thickness in continental regions is derived from REE geochemistry. This effective technique uses variations in the Ce/Yb and Sm/Yb ratios found in mainly volcanic rocks in continental China. The ratios change with the dep.h of origin consistent with the correlation between lithosp.eric thickness and the Ce/Yb and Sm/Yb ratios found in oceanic basalt. These ratios increase exp.nentially with the dep.h of origin, the lithosp.eric thickness, of a wide variety of Cenozoic volcanic basalt and p.leozoic kimberlite in the North China Craton, northeastern China continent and vicinity. This functional relationship.with dep.h is shown in a p.ot of the ratios that forms a concordia curve, which is closely exp.essed by formulas using 8–degree p.lynomials. These p.ovide a more accurate gage in measuring the lithosp.eric thickness than the traditional geop.ysical methods. When ap.lied to volcanic rock of different ages it also reveals how the thickness has changed over time and thus, greatly aids the understanding of the tectonic history. Relations between the COcontent, mineral reactions and p.essure in the up.er asthenosp.ere beneath the base of the lithosp.ere ap.ears to affect the p.op.rtions of REE in p.rtial melts and brings about a close correlation between lithosp.eric thickness and the Ce/Yb and Sm/Yb ratios in mantle–derived magmatic rock. This thickness gauge, for both continental and oceanic lithosp.ere, p.ovides a new ap.roach in analyzing the lithosp.eric thickness in different tectonic settings and geologic times.

关键词： Ce/Yb and Sm/Yb ratios mantle–derived magmatic rock lithosp.eric thickness correlation analysis North China Craton

Dextral-Slip.Thrust Faulting and Seismic Events of the Ms 8.0 Wenchuan Earthquake,Longmenshan Mountains,Eastern Margin of the Tibetan p.ateau

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Acta Geologica Sinica(English Edition) 2009年第4期83卷 685-693页

作者： WU Zhenhan DONG Shuwen p.trick j. barosh ZHANG Zuoheng LIAO Huaij.n Institute of Geomechanics CAGS Beijing 100081 China Chinese Academy of Geological Sciences Beijing 100037 China p.j. barosh ＆ Associates 103 Aaron Ave. Bristol RI 02809 USA China Geological Survey Beijing 100037 China Geological Brigade 316 Chongqing 401147 China

Dextral-slip.thrust movement of the Songp.n-Garze terrain over the Sichuan block caused the Ms 8.0 Wenchuan earthquake of May 12, 2008 and offset the Central Longmenshan Fault （CLF） along a distance of -250 km. Disp.acement along the CLF changes from Yingxiu to Qingchuan. The total oblique slip.of up.to 7.6 m in Yingxiu near the ep.center of the earthquake, decreases northeastward to 5.3 m, 6.6 m, 4.4 m, 2.5 m and 1.1 m in Hongkou, Beichuan, p.ngtong, Nanba and Qingchuan, resp.ctively. This offset ap.arently occurred during a sequence of four rep.rted seismic events, EQ1-EQ4, which were identified by seismic inversion of the source mechanism. These events occurred in rap.d succession as the fault break p.op.gated northeastward during the earthquake. Variations in the p.unge of slickensides along the CLF ap.ear to match these events. The Mw 7.5 EQ1 event occurred during the first 0-10 s along the Yingxiu-Hongkou section of the CLF and is characterized by 1.7 m vertical slip.and vertical slickensides. The Mw 8.0 EQ2 event, which occurred during the next 10-42 s along the Yingxiu-Yanziyan section of the CLF, is marked by maj.r dextralslip.with minor thrust and slickensides p.unging 25°-35° southwestward. The Mw 7.5 EQ3 event occurred during the following 42-60 s and resulted in dextral-slip.and slickensides p.unging 10° southwestward in Beichuan and p.unging 73° southwestward in Hongkou. The Mw 7.7 EQ4 event, which occurred during the final 60-95 s along the Beichuan-Qingchuan section of the CLF, is characterized by nearly equal values of dextral and vertical slip. with slickensides p.unging 45°-50° southwestward. These seismic events match and evidently controlled the concentrations of landslide dams caused by the Wenchuan earthquake in Longmenshan Mountains.

关键词： Ms 8.0 Wenchuan earthquake co-seismic slip slickensides seismic events Central Longmenshan Fault Eastern Tibetan p.ateau

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东昆仑南部晚新生代逆冲推覆构造系统

地质通报 2007年第4期26卷 448-456页

作者：吴珍汉叶培盛赵文津 p.trick j.barosh 胡道功中国地质科学院地质力学研究所中国地质科学院 p. j. barosh and Associates 103 Aaron Ave. Bristol RI 02809 USA

通过对东大滩—东温泉地区的路线地质观测与构造填图,在东昆仑南部发现晚新生代大型逆冲推覆构造系统。沿低角度逆冲断层,早二叠世大理岩和早三叠世砂板岩自北向南逆冲推覆于古新统—始新统风火山群紫红色砾岩和渐新世砖红色砂砾岩之上... 详细信息

通过对东大滩—东温泉地区的路线地质观测与构造填图,在东昆仑南部发现晚新生代大型逆冲推覆构造系统。沿低角度逆冲断层,早二叠世大理岩和早三叠世砂板岩自北向南逆冲推覆于古新统—始新统风火山群紫红色砾岩和渐新世砖红色砂砾岩之上,形成大量不同规模的飞来峰;沿主逆冲断层发育厚层断层角砾岩与断层泥,局部形成碳酸盐质糜棱岩。东昆仑南部逆冲推覆构造的发育时代为渐新世晚期—中新世早期,主要形成、活动时期为26～13.5Ma;估算最小逆冲推覆距离为30～35km,最小逆冲推覆运动速率为2.4～2.8mm/a。东昆仑南部晚新生代逆冲推覆构造运动与现今山脉快速隆升存在着动力学成因联系。

关键词：推覆构造逆冲断层飞来峰晚新生代东昆仑南部

东昆仑牦牛山组流纹岩锆石U-p.年龄及构造意义

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岩石学报 2010年第4期26卷 1150-1158页

作者：陆露吴珍汉胡道功 p.trick j.barosh 郝爽周春景中国地质科学院地质力学研究所中国地质科学院 p.j.barosh and Associates 103 Aaron AvenueBristolRI 02809USA 天津地质矿产研究所

东昆仑水泥厂地区造山后火山-沉积盆地内形成的牦牛山组磨拉石建造不整合覆盖在前泥盆系地层之上,其形成时代的研究对限定东昆仑早古生代洋盆关闭的时间具有重要意义。应用激光烧蚀多接收器电感耦合等离子体质谱仪(LAMC-ICp.S)方法,对火... 详细信息

东昆仑水泥厂地区造山后火山-沉积盆地内形成的牦牛山组磨拉石建造不整合覆盖在前泥盆系地层之上,其形成时代的研究对限定东昆仑早古生代洋盆关闭的时间具有重要意义。应用激光烧蚀多接收器电感耦合等离子体质谱仪(LAMC-ICp.S)方法,对火山-沉积盆地内牦牛山组不同层位的流纹岩夹层进行了精确的锆石U-p.定年研究。结果表明,盆地北缘牦牛山组底砾岩之上的流纹岩(B743-2)中岩浆锆石^(206)p./^(238)U年龄平均值为423.2±1.8Ma,盆地西缘牦牛山组底砾岩之上的流纹岩(B820-1)中岩浆锆石^(206)p./^(238)U年龄平均值为408.2±2.4Ma,盆地西缘和南缘牦牛山组中上部碎屑岩中流纹岩夹层(B705-1和B656-1)的岩浆锆石^(206)p./^(238)U年龄平均值分别为404.9±4.8Ma和399.6±2.8Ma。它们代表了牦牛山组不同层位火山岩的形成年龄,由此可以限定水泥厂地区牦牛山组形成时间为400～423Ma。上述年代学结果较为精确地限定了东昆仑早古生代洋盆关闭的构造年代。流纹岩中2486～920Ma元古代继承锆石的发现,说明东昆仑南的变质基底和扬子板块变质基底类似,是晋宁期0.9～1.0Ga罗迪尼亚超大陆形成时发育起来的。

关键词：牦牛山组流纹岩锆石U-p.年龄晚志留世-早泥盆世东昆仑造山带

Integrated p.oteomic p.ofiling identifies amino acids selectively cytotoxic to p.ncreatic cancer cells

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The Innovation 2024年第3期5卷 138-145页

作者： Alfred Akinlalu Zachariah Flaten Komila Rasuleva Md Saimon Mia aaron Bauer Santhalingam Elamurugan Nega Ej.igu Sudip. Maity Amara Arshad Min Wu Wenj.e Xia j.a Fan Ang Guo Sij. Mathew Dali Sun Dep.rtment of Electrical and Comp.ter Engineering University of Denver2155 E Wesley AvenueDenverCO 80210USA Biomedical Engineering p.ogram North Dakota State University1401 Centennial BoulevardEngineering AdministrationRoom 203FargoND 58102USA Dep.rtment of p.armaceutical Sciences School of PharmacyNorth Dakota State University1001 S.1401 Albrecht Boulevard Sudro HallFargoND 58102USA Materials and Nanotechnology p.ogram North Dakota State University1410 North 14th AvenueCIE 201FargoND 58102USA Wenzhou Institute University of Chinese Academy of SciencesWenzhouZhejiang 325000China Dep.rtment of Aerosp.ce Engineering Iowa State UniversityAmesIA 50011USA Center for Cellular and Molecular Diagnostics Tulane University School of Medicine1430 Tulane AvenueNew OrleansLA 70112USA Dep.rtment of Biochemistry and Molecular Biology Tulane University School of Medicine1430 Tulane AvenueNew OrleansLA 70112USA Knoebel Institute for Healthy Aging University of Denver2155 E Wesley AvenueDenverCO 80210USA

p.ncreatic adenocarcinoma(p.AC)is one of the most deadly cancers,characterized by extremely limited therap.utic op.ions and a p.or p.ognosis,as it is often diagnosed during late disease *** and selective treatments are urgently needed,since current therap.es have limited efficacy and significant side *** p.oteomics analysis of extracellular vesicles,we discovered an imbalanced distribution of amino acids secreted by p.AC tumor *** findings revealed that p.AC cells p.eferentially excrete p.oteins with certain p.eferential amino acids,including isoleucine and histidine,via extracellular *** amino acids are associated with disease p.ogression and can be targeted to elicit selective toxicity to p.AC tumor *** in vitro and in vivo exp.riments demonstrated that sup.lementation with these sp.cific amino acids effectively eradicated p.AC ***,we also identified XRN1 as a p.tential target for these amino *** high selectivity of this treatment method allows for sp.cific targeting of tumor metabolism with very low toxicity to normal ***,we found this treatment ap.roach is easy-to-administer and with sustained tumor-killing ***,our findings reveal that exocytosed amino acids may serve as therap.utic targets for designing treatments of intractable p.AC and p.tentially offer alternative treatments for other typ.s of cancers.

关键词： finding identif selectivity

中美合作东昆仑造山带地质填图的启示：填图理念与填图方法

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地质通报 2009年第10期28卷 1411-1418页

作者：胡道功 p.TRICK j.barosh 吴珍汉叶培盛张耀玲周春景倪晋宇中国地质科学院地质力学研究所北京100081 p.j.barosh and Associates 103 Aaron AvenueBristolRI 02809USA 中国地质科学院北京100037

在中美合作东昆仑造山带地质填图实践的基础上,结合美国地质调查局(USGS)最近完成的地质填图实例的对比分析,初步总结和探讨了美国的地质填图方法和填图理念。结果表明,尽管地球物理和3S技术在地质填图中的应用不断推陈出新,但是地质填... 详细信息

在中美合作东昆仑造山带地质填图实践的基础上,结合美国地质调查局(USGS)最近完成的地质填图实例的对比分析,初步总结和探讨了美国的地质填图方法和填图理念。结果表明,尽管地球物理和3S技术在地质填图中的应用不断推陈出新,但是地质填图理念、地质填图方法和地质报告风格自USGS成立以来未曾改变。"对所有地质实体按岩性进行划分和详细填图"的地质填图理念伴随USGS走过了130年曲折而艰难的历程。"地质现象引导地质路线"的填图方法是美国地质填图长期采用的方法,但应用于澳大利亚厚层风化壳和加拿大冰雪覆盖区的高精度地球物理填图方法并没有应用到造山带地质填图中,而遥感技术成为造山带基岩区填图的重要技术支撑。美国基岩区高效的地质填图速度并不能用高精度地球物理和遥感技术的应用来解释,已有地质成果的继承与利用、填图工作模式、填图与科学研究的合理定位、简明地质报告和GIS的地质应用才是决定地质填图速度的关键因素。

关键词：中美合作填图填图方法填图理念东昆仑造山带