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potential role of strike-slip faults in opening up the South China Sea

National Science Review 2019年第5期6卷 891-901页

作者： Chi-Yue Huang pinxian Wang Mengming Yu Chen-Feng You Char-Shine Liu Xixi Zhao Lei Shao Guangfa Zhong graciano p.yumul jr State Key Laboratory of Marine Geology School of Ocean and Earth Science Tongji University Department of Earth Science Cheng Kung University Institute of Oceanography Taiwan University Earth and planetary Sciences University of California School of Environmental Science and Management University of the Philippines Los Banos College

Radiometric dates of key rock units indicate that a remnant Late Mesozoic ocean of the Huatung Basin is still preserved today east of the South China Sea(SCS).We integrate regional geology with a Cretaceous oceanic basement in the vicinity of the Huatung Basin to reconstruct the Huatung plate east of the Eurasian *** of geophysical investigations, four expeditions of deep-sea drilling and a renaissance of regional geology allow us to propose a hypothesis that the mechanism responsible for the SCS opening was raised from strike-slip fault on the *** hypothesis suggests that the SCS opening could highly relate to the strike-slip faults inherited from Late Mesozoic structures onshore–offshore the SE Cathaysia Block to develop rhombic-shaped extensional basins en echelon on the thinned Eurasian continental crust in the Early *** was followed by sinistral strike-slip movements along the boundary between the Eurasian plate and the Huatung plate driven by oblique subduction of the Huatung plate to the northwest coupled with slab-pull force by southward subduction of the proto-SCS to open up the triangle-shaped oceanic East Sub-basin in the Early Oligocene(33/34 Ma).The spreading ridge then propagated southwestward in the step-over segment between the Zhongnan-Lile and the Red River strike-slip fault systems to open the triangle-shaped oceanic Southwest Sub-basin by 23 *** plate boundary fault was subsequently converted into the Manila Trench when the Eocene Sierra Madre arc of the Huatung plate had moved from the south to its present latitude by the Middle Miocene.

关键词： South China Sea Huatung Basin Eurasian continent strike-slip fault plate boundary

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Characterization of the proto-philippine Sea plate:Evidence from the emplaced oceanic lithospheric fragments along eastern philippines

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Geoscience Frontiers 2020年第1期11卷 3-21页

作者： Carla B.Dimalanta Decibel V.Faustino-Eslava Jillian Aira S.Gabo-Ratio Edanjarlo J.Marquez Jenielyn T.padrones Betchaida D.payot Karlo L.Queano Noelynna T.Ramos graciano p.yumul jr. Rushurgent Working Group National Institute of Geological SciencesCollege of ScienceUniversity of the PhilippinesDilimanQuezon CityPhilippines School of Environmental Science and Management University of the PhilippinesLos BañosLagunaPhilippines Department of physical Sciences and Mathematics University of the Philippines-ManilaPadre FauraManilaPhilippines Institute of Renewable Natural Resources University of the PhilippinesLos BañosLagunaPhilippines Department of Environmental Science Ateneo de Manila UniversityQuezon CityPhilippines Itogon-Suyoc Resources Inc. OrtigasPasig CityPhilippines Apex Mining Company Inc. OrtigasPasig CityPhilippines

The proto-philippine Sea plate(ppSp)has been proposed by several authors to account for the origin of the Mesozoic supra-subduction ophiolites along the philippine *** this paper,a comprehensive review of the ophiolites in the eastern portion of the philippines is *** data on the geology,ages and geochemical signatures of the oceanic lithospheric fragments in Luzon(Isabela,Lagonoy in Camarines Norte,and Rapu-Rapu island),Central philippines(Samar,Tacloban,Malitbog and Southeast Bohol),and eastern Mindanao(Dinagat and pujada)are *** of the Halmahera Ophiolite to the south of the philippines are also reviewed for *** all of the crust-mantle sequences preserved along the eastern philippines share Early to Late Cretaceous *** geochemical signatures of mantle and crustal sections reflect both mid-oceanic ridge and suprasubduction *** paleomagnetic information is currently limited to the Samar Ophiolite,results indicate a near-equatorial Mesozoic supra-subduction zone *** general,correlation of the crust-mantle sequences along the eastern edge of the philippines reveal that they likely are fragments of the Mesozoic ppSp.

关键词： Eastern philippines Ophiolites proto-philippine Sea plate

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Slab rollback and microcontinent subduction in the evolution of the Zambales Ophiolite Complex(philippines):A review

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Geoscience Frontiers 2020年第1期11卷 23-36页

作者： graciano p.yumul jr. Carla B.Dimalanta Ricky C.Salapare Karlo L.Queano Decibel V.Faustino-Eslava Edanjarlo J.Marquez Noelynna T.Ramos Betchaida D.payot Juan Miguel R.Guotana Jillian Aira S.Gabo-Ratio Leo T.Armada Jenielyn T.padrones Keisuke Ishida Shigeyuki Suzuki Apex Mining Company Inc. OrtigasPasig CityPhilippines Rushurgent Working Group National Institute of Geological SciencesCollege of ScienceUniversity of the PhilippinesDilimanQuezon CityPhilippines GHD Chino Roces AvenueMakati CityPhilippines Department of Environmental Science Ateneo de Manila UniversityQuezon CityPhilippines School of Environmental Science and Management University of the Philippines-Los BañosLagunaPhilippines Department of physical Sciences and Mathematics University of the Philippines-ManilaPadre FauraManilaPhilippines Graduate School of Natural Science and Technology Kanazawa UniversityJapan Institute of Renewable Natural Resources University of the Philippines-Los BañosLagunaPhilippines Institute of Socio-Arts and Sciences University of TokushimaTokushimaJapan Department of Earth Sciences Okayama UniversityOkayamaJapan

New radiolarian ages show that the island arc-related Acoje block of the Zambales Ophiolite Complex is possibly of Late Jurassic to Early Cretaceous *** dating of its plutonic and volcanichypabyssal rocks yielded middle Eocene *** the other hand,the paleontological dating of the sedimentary carapace of the transitional mid-ocean ridge-island arc affiliated Coto block of the ophiolite complex,together with isotopic age datings of its dikes and mafic cumulate rocks,also yielded Eocene *** offers the possibility that the Zambales Ophiolite Complex could have:(1)evolved from a Mesozoic arc(Acoje block)that split to form a Cenozoic back-arc basin(Coto block),(2)through faulting,structurally juxtaposed a Mesozoic oceanic crust with a younger Cenozoic lithospheric fragment or(3)through the interplay of slab rollback,slab break-off and,at a later time,collision with a microcontinent fragment,caused the formation of an island arc-related ophiolite block(Acoje)that migrated trench-ward resulting into the generation of a back-arc basin(Coto block)with a limited subduction *** Meso-Cenozoic ophiolite complex is compared with the other oceanic lithosphere fragments along the western seaboard of the philippines in the context of their evolution in terms of their recognized environments of generation.

关键词： Ophiolite Slab rollback Radiolarians Subduction Zambales philippines

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菲律宾Zambales蛇绿岩套的再研究:对其特提斯来源的启示(英文)

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地球学报 2012年第S1期33卷 58-58页

作者： Karlo L.QUEANO Carla B.DIMALANTA graciano p.yumul jr Decibel V.FAUSTINO-ESLAVA Edanjarlo J.MARQUEZ Noelynna T.RAMOS Keisuke ISHIDA Shigeyuki SUZUKI Ricky C.SALApARE Michael peter M.SANCHEZ Juan Miguel R.GUOTANA Rose Ann B.CONCEpCION School of Civil Environmental and Geological EngineeringMapua Institute of TechnologyMuralla St.IntramurosManilaPhilippines Rushurgent Working Group National Institute of Geological SciencesUniversity of the Philippines-DilimanQuezon CityPhilippines Monte Oro Resources and Energy Inc. Makati CityPhilippines School of Environmental Science and Management University of the Philippines-Los Ba osLagunaPhilippines Department of physical Sciences and Mathematics University of the Philippines-ManilaPadre FauraManilaPhilippines Institute of Socio-Arts and Sciences University of TokushimaJapan Department of Earth Sciences Okayama UniversityJapan Department of Civil Engineering Adamson UniversityManilaPhilippines

A number of geological studies have already been conducted on the Zambales Ophiolite Complex(ZOC), a north-south trending complete ophiolite sequence exposed in the western portion of Central Luzon, *** works recogniz... 详细信息

关键词： Zambales Ophiolite Complex Tethyan radiolarians philippines

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The meteorologically abnormal year of 2006 and natural disasters in the philippines

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Episodes 2008年第4期31卷 378-383页

作者： graciano p. yumul jr. Nathaniel A. Cruz Nathaniel T. Servando Carla B. Dimalanta National Institute of Geological Sciences College of Science University of the Philippines Diliman Quezon City Philippines philippine Atmospheric Geophysical and Astronomical Services Administration Department of Science and Technology Quezon City Philippines

In the early part of 2006 the philippines was hit by a La Nina event which brought floods, flashfloods and landslides. The most significant event was the February 2006 landslide that covered the whole community of Guinsaugon, in Southern Leyte, resulting in 154 deaths with 973 people still missing. Another rare event was the simultaneous presence of two tropical cyclones inside the philippine Area of Responsibility （pAR） in August-- Tropical Depression Bopha and Tropical Storm Saomai--that enhanced the southwest monsoon. With the strong winds and high waves associated with the southwest mon- soon, an oil tanker, the M/T Solar 1, sank, resulting in the worst oil spill the country has ever suffered. Lastly, with a weak El Nino phenomenon forming in the pacific Ocean and affecting the philippines, a destructive typhoon, Xangsane, made a multi-landfall before hitting Metropolitan Manila. This was followed by the landfall of three superty- phoons--Cimaron, Chebi and Durian--during the last quarter of the year, bringing tremendous destruction of life and property. The occurrence of these weather events are attributed to climate variability the effects of which were exacerbated by a range of factors that include inappropriate land use.

关键词：菲律宾灾难洪水旋风气候反常

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Crustal thickening in an active margin setting （philippines）： The whys and the hows

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Episodes 2004年第4期27卷 260-264页

作者： C.B.Dimalanta G.p.yumul,jr. NationalInstituteofGeologicalSciences CollegeofScienceUniversityofthePhilippinesDilimanQuezonCityPhilippines1101.

A synthesis of crustal thickness estimates was made recently utilizing available field, geochemical, seismicity, shear wave velocity and gravity data in the philippines. The results show that a significant portion of the philippine archipelago is generally characterized by crust with a thickness of around 25 to 30 kilometers. However, two zones, which are made up of a thicker crust (from 30 to 65 km) have also been delineated. The Luzon Central Cordillera region is characterized by thick crust. Another belt of thickened crust is observed in the Bicol-Negros-panay-Central Mindanao region. This paper examines the interplay of tectonic and magmatic processes and their role in modifying philippine arc crust. The processes, which could account for the observed crustal thicknesses, are presented. The contributions of magmatic arcs as compared to the contribution of the emplacement and accretion of ophiolite complexes to crustal thickness are also discussed.

关键词：地壳增厚活跃边缘环境剪力波速度菲律宾群岛地质构造

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北吕宋岛菲律宾活动带蛇绿岩及其上覆浊积岩的放射虫研究新进展(英文)

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地球学报 2012年第S1期33卷 29-31页

作者： Keisuke ISHIDA Shigeyuki SUZUKI Carla DIMALANTA graciano yumul jr. Karlo QUEANO Decibel FAUSTINO-ESLAVA Edanjarlo MARQUEZ Noelynna RAMOS Rolando pENA Institute of Socio-Arts and Sciences University of TokushimaJapan Department of Earth Sciences Okayama UniversityJapan Rushurgent Working Group National Institute of Geological SciencesUniversity of the PhilippinesDilimanQuezon CityPhilippines 1101 Monte Oro Resources and Energy Inc. PasigPhilippines Mines and Geosciences Bureau DilimanQuezon CityPhilippines School of Environmental Science and Management University of the Philippines-Los Ba osLagunaPhilippines Department of physical Sciences and Mathematics University of the Philippines-ManilaPhilippines Mines and Geosciences Bureau(MGB) Philippines

The basement of the philippine Mobile Belt (pMB) is mainly composed of ophiolites that are mostly overlain by paleogene to Miocene turbidites in central *** clarify the geological development of the pMB with respect t... 详细信息

关键词： philippine Mobile Belt Radiolarian fauna Ophiolitic Complex Turbidites

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Measuring magnetic declination with a compass, virtual globes and a global positioning system

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International Journal of Digital Earth 2009年第1期2卷 31-43页

作者： William p.O’Brien jr physics Department Southwestern UniversityGeorgetownTexas78626USA

Earth’s magnetic declination was experimentally measured at 15 sites in western USA from Alaska to Texas;each site exhibited a large linear feature identifiable in virtual globe imagery(NASA’s World Wind or Google Earth).The difference between the geographic bearing of the linear feature measured directly on a virtual globe image and the magnetic bearing of the same linear feature measured on the ground with a compass defines the magnetic declination d for that *** all 15 sites,d values,determined by this differencing procedure,ranged from about 208 to 58 E and fell within 18(over half within 0.58)of expected *** positioning system(GpS)data recorded at most sites and plotted on virtual globe images aided in the identification of relevant *** straightforward method for determining magnetic declination using virtual globe software and a compass provides a contemporary geospatial field/laboratory activity that dramatically elucidates and contrasts features of magnetic and geographic coordinate systems for students in various disciplines involving geomagnetism,navigation,geography or spherical polar geometry.

关键词： Earth observation GpS magnetic declination geophysics

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A pseudo-Stokes Mesh Motion Algorithm

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Advances in Applied Mathematics and Mechanics 2013年第2期5卷 194-211页

作者： Luciano Goncalves Noleto Manuel N.D.Barcelos jr. Antonio C.p.Brasil jr. Universidade de Brasılia Faculdade de TecnologiaDepartamento de Engenharia MecanicaLaboratorio de Energia e Ambiente.Asa Norte.Brasılia-DFBrasil70.910-900 Universidade de Brasılia no Gama.Complexo de Educa¸c˜ao CulturaEsporte e Lazer.A rea Especial de Industria 1Setor LesteFaculdade Lote 1.Gama-DFBrasil72.444-210

This work presents a moving mesh methodology based on the solution of a pseudo flow *** mesh motion is modeled as a pseudo Stokes problem solved by an explicit finite element projection *** mesh quality requirements are satisfied by employing a null divergent velocity *** methodology is applied to triangular unstructured meshes and compared to well known approaches such as the ones based on diffusion and pseudo structural *** of the test cases is an airfoil with a fully meshed domain.A specific rotation velocity is imposed as the airfoil boundary *** other test is a set of two cylinders that move toward each other.A mesh quality criteria is employed to identify critically distorted elements and to evaluate the performance of each mesh motion *** results obtained for each test case show that the pseudo-flow methodology produces satisfactory meshes during the moving process.

关键词： Moving boundaries mesh motion strategy finite element projection methods

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SEM in situ laboratory investigations on damage growth in GFRp composite under three-point bending tests

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Chinese Science Bulletin 2010年第12期55卷 1199-1208页

作者： ZHOU HongWei MISHNAEVSKY jr L BRONDSTED p TAN JinBiao GUI LeLe State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology (Beijing) Beijing 100083 China Rise National Laboratory for Sustainable Energy DTU AFM-228 P.O. Box 49 DK-4000 Roskilde Denmark

Glass fiber-reinforced polymer (GFRp) composites are widely used in low-weight *** (scanning electron microscopy) in situ experiments of damage growth in GFRp composite under three-point bending loads are carried *** summarizing the experimental results of three groups of samples with different orientation angles of fibers,the dependence of mechanical parameters on the orientation angles of fibers are *** regression analysis show that the peak strengths,the elastic strengths and the elastic modulus of the composites decease with the orientation angles of fibers almost ***,the damage growth and meso-scale structure changes in GFRp composites during three-point bending loading are analyzed.

关键词：玻璃钢复合材料三点弯曲试验实验室扫描电镜现场调查损伤纤维增强聚合物扫描电子显微镜

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