List of Plate Ids to Accompany Seton Et. Al. Global Model 000 Hotspots
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Kinematic Reconstruction of the Caribbean Region Since the Early Jurassic
Earth-Science Reviews 138 (2014) 102–136 Contents lists available at ScienceDirect Earth-Science Reviews journal homepage: www.elsevier.com/locate/earscirev Kinematic reconstruction of the Caribbean region since the Early Jurassic Lydian M. Boschman a,⁎, Douwe J.J. van Hinsbergen a, Trond H. Torsvik b,c,d, Wim Spakman a,b, James L. Pindell e,f a Department of Earth Sciences, Utrecht University, Budapestlaan 4, 3584 CD Utrecht, The Netherlands b Center for Earth Evolution and Dynamics (CEED), University of Oslo, Sem Sælands vei 24, NO-0316 Oslo, Norway c Center for Geodynamics, Geological Survey of Norway (NGU), Leiv Eirikssons vei 39, 7491 Trondheim, Norway d School of Geosciences, University of the Witwatersrand, WITS 2050 Johannesburg, South Africa e Tectonic Analysis Ltd., Chestnut House, Duncton, West Sussex, GU28 OLH, England, UK f School of Earth and Ocean Sciences, Cardiff University, Park Place, Cardiff CF10 3YE, UK article info abstract Article history: The Caribbean oceanic crust was formed west of the North and South American continents, probably from Late Received 4 December 2013 Jurassic through Early Cretaceous time. Its subsequent evolution has resulted from a complex tectonic history Accepted 9 August 2014 governed by the interplay of the North American, South American and (Paleo-)Pacific plates. During its entire Available online 23 August 2014 tectonic evolution, the Caribbean plate was largely surrounded by subduction and transform boundaries, and the oceanic crust has been overlain by the Caribbean Large Igneous Province (CLIP) since ~90 Ma. The consequent Keywords: absence of passive margins and measurable marine magnetic anomalies hampers a quantitative integration into GPlates Apparent Polar Wander Path the global circuit of plate motions. -
A Dangling Slab, Amplified Arc Volcanism, Mantle Flow and Seismic Anisotropy in the Kamchatka Plate Corner
AGU Geodynamics Series Volume 30, PLATE BOUNDARY ZONES Edited by Seth Stein and Jeffrey T. Freymueller, p. 295-324 1 A Dangling Slab, Amplified Arc Volcanism, Mantle Flow and Seismic Anisotropy in the Kamchatka Plate Corner Jeffrey Park,1 Yadim Levin,1 Mark Brandon,1 Jonathan Lees,2 Valerie Peyton,3 Evgenii Gordeev ) 4 Alexei Ozerov ,4 Book chapter in press with "Plate Boundary Zones," edited by Seth Stein and Jeffrey Freymuller Abstract The Kamchatka peninsula in Russian East Asia lies at the junction of a transcurrent plate boundary, aligned with the western Aleutian Islands, and a steeply-dipping subduction zone with near-normal convergence. Seismicity patterns and P-wave tomography argue that subducting Pacific lithosphere terminates at the Aleutian junction, and that the downdip extension (>150km depth) of the slab edge is missing. Seismic observables of elastic anisotropy (SKS splitting and Love-Rayleigh scattering) are consistent \Vith asthenospheric strain that rotates from trench-parallel beneath the descending slab to trench-normal beyond its edge. Present-day arc volcanism is concentrated near the slab edge, in the Klyuchevskoy and Sheveluch eruptive centers. Loss of the downdip slab edge, whether from thermo-convective or ductile instability, and subsequent "slab-window" mantle return flow is indicated by widespread Quaternary volcanism in the Sredinny Range inland of Klyuchevskoy and Sheveluch, as well as the inferred Quaternary uplift of the central Kamchatka depression. The slab beneath Klyuchevskoy has shallower dip (35°) than the subduction zone farther south (55°) suggesting a transient lofting of the slab edge, either from asthenospheric flow or the loss of downdip load. -
Breakup and Early Seafloor Spreading Between India and Antarctica
Geophys. J. Int. (2007) 170, 151–169 doi: 10.1111/j.1365-246X.2007.03450.x Breakup and early seafloor spreading between India and Antarctica Carmen Gaina,1 R. Dietmar Muller¨ ,2 Belinda Brown,2 Takemi Ishihara3 and Sergey Ivanov4 1Center for Geodynamics, Geological Survey of Norway, Trondheim, Norway 2Earth Byte Group, School of Geosciences, The University of Sydney, Australia 3Institute of Geology and Geoinformation, National Institute of Advanced Industrial Science and Technology, AIST Central 7, Tsukuba, Japan 4Polar Marine Geophysical Research Expedition, St Petersburg Accepted 2007 March 21. Received 2007 March 21; in original form 2006 May 26 SUMMARY We present a tectonic interpretation of the breakup and early seafloor spreading between India and Antarctica based on improved coverage of potential field and seismic data off the east Antarctic margin between the Gunnerus Ridge and the Bruce Rise. We have identified a series of ENE trending Mesozoic magnetic anomalies from chron M9o (∼130.2 Ma) to M2o (∼124.1 Ma) in the Enderby Basin, and M9o to M4o (∼126.7 Ma) in the Princess Elizabeth Trough and Davis Sea Basin, indicating that India–Antarctica and India–Australia breakups were roughly contemporaneous. We present evidence for an abandoned spreading centre south geoscience of the Elan Bank microcontinent; the estimated timing of its extinction corresponds to the early surface expression of the Kerguelen Plume at the Southern Kerguelen Plateau around rine 120 Ma. We observe an increase in spreading rate from west to east, between chron M9 Ma and M4 (38–54 mm yr–1), along the Antarctic margin and suggest the tectono-magmatic segmentation of oceanic crust has been influenced by inherited crustal structure, the kinematics GJI of Gondwanaland breakup and the proximity to the Kerguelen hotspot. -
Playing Jigsaw with Large Igneous Provinces a Plate Tectonic
PUBLICATIONS Geochemistry, Geophysics, Geosystems RESEARCH ARTICLE Playing jigsaw with Large Igneous Provinces—A plate tectonic 10.1002/2015GC006036 reconstruction of Ontong Java Nui, West Pacific Key Points: Katharina Hochmuth1, Karsten Gohl1, and Gabriele Uenzelmann-Neben1 New plate kinematic reconstruction of the western Pacific during the 1Alfred-Wegener-Institut Helmholtz-Zentrum fur€ Polar- und Meeresforschung, Bremerhaven, Germany Cretaceous Detailed breakup scenario of the ‘‘Super’’-Large Igneous Province Abstract The three largest Large Igneous Provinces (LIP) of the western Pacific—Ontong Java, Manihiki, Ontong Java Nui Ontong Java Nui ‘‘Super’’-Large and Hikurangi Plateaus—were emplaced during the Cretaceous Normal Superchron and show strong simi- Igneous Province as result of larities in their geochemistry and petrology. The plate tectonic relationship between those LIPs, herein plume-ridge interaction referred to as Ontong Java Nui, is uncertain, but a joined emplacement was proposed by Taylor (2006). Since this hypothesis is still highly debated and struggles to explain features such as the strong differences Correspondence to: in crustal thickness between the different plateaus, we revisited the joined emplacement of Ontong Java K. Hochmuth, [email protected] Nui in light of new data from the Manihiki Plateau. By evaluating seismic refraction/wide-angle reflection data along with seismic reflection records of the margins of the proposed ‘‘Super’’-LIP, a detailed scenario Citation: for the emplacement and the initial phase of breakup has been developed. The LIP is a result of an interac- Hochmuth, K., K. Gohl, and tion of the arriving plume head with the Phoenix-Pacific spreading ridge in the Early Cretaceous. The G. -
Shape of the Subducted Rivera and Cocos Plates in Southern Mexico
JOURNALOF GEOPHYSICAL RESEARCH, VOL. 100, NO. B7, PAGES 12,357-12,373, JULY 10, 1995 Shapeof the subductedRivera and Cocosplates in southern Mexico: Seismic and tectonicimplications Mario Pardo and Germdo Sufirez Insfitutode Geoffsica,Universidad Nacional Aut6noma de M6xico Abstract.The geometry of thesubducted Rivera and Cocos plates beneath the North American platein southernMexico was determined based on the accurately located hypocenters oflocal and te!eseismicearthquakes. The hypocenters ofthe teleseisms were relocated, and the focal depths of 21 eventswere constrainedusing a bodywave inversion scheme. The suductionin southern Mexicomay be approximated asa subhorizontalslabbounded atthe edges by the steep subduction geometryof theCocos plate beneath the Caribbean plate to the east and of theRivera plate beneath NorthAmerica to thewest. The dip of theinterplate contact geometry is constantto a depthof 30 kin,and lateral changes in thedip of thesubducted plate are only observed once it isdecoupled fromthe overriding plate. On thebasis of theseismicity, the focal mechanisms, and the geometry ofthe downgoing slab, southern Mexico may be segmented into four regions ß(1) theJalisco regionto thewest, where the Rivera plate subducts at a steepangle that resembles the geometry of theCocos plate beneath the Caribbean plate in CentralAmerica; (2) theMichoacan region, where thedip angleof theCocos plate decreases gradually toward the southeast, (3) theGuerrero-Oaxac.a region,bounded approximately by theonshore projection of theOrozco and O'Gorman -
Spatio-Temporal Characteristics of Frictional Properties on The
Yamada et al. Earth, Planets and Space (2021) 73:18 https://doi.org/10.1186/s40623-020-01326-8 FULL PAPER Open Access Spatio-temporal characteristics of frictional properties on the subducting Pacifc Plate of the east of Tohoku district, Japan estimated from stress drops of small earthquakes Takuji Yamada1* , Meitong Duan2,3 and Jun Kawahara1 Abstract The east coast of the Tohoku district, Japan has a high seismicity, including aftershocks of the 2011 M9 Tohoku earth- quake. We analyzed 1142 earthquakes with 4.4 ≤ MW ≤ 5.0 that occurred in 2003 through 2018 and obtained spatio- temporal pattern of stress drop on the Pacifc Plate that subducts beneath the Okhotsk Plate. Here we show that small earthquakes at edges of a region with a large slip during the 2011 Tohoku earthquake had high values of stress drop, indicating that the areas had a high frictional strength and suppressed the coseismic slip of the 2011 Tohoku earthquake. In addition, stress drops of small earthquakes in some of the areas likely decreased after the 2011 Tohoku earthquake. This indicates that the frictional strength decreased at the areas due to the following aftershocks of the 2011 Tohoku earthquake, consistent with a high aftershock activity. This also supports that the frictional properties on a subducting plate interface can be monitored by stress drops of small earthquakes, as pointed out by some previous studies. Keywords: Frictional properties, Pacifc Plate, Stress drop, Spatio-temporal pattern, Small earthquake, East coast of the Tohoku district, 2011 Tohoku earthquake Background the east coast of the Tohoku district, Japan and found that Tectonics and characteristics of earthquakes of the east areas with a large coseismic displacement, where they coast of the Tohoku district, Japan refer to as asperities, distributed as stepping stones. -
Geologic Report for the Navarin Basin Planning Area, Bering Sea, A1 Aska
OCS Report MMS 85-0045 Geologic Report for the Navarin Basin Planning Area, Bering Sea, A1 aska Ronald F. Turner Gary C. Martin Tabe 0. Flett David A. Steffy edited by Ronald F. Turner United States Department of the Interior Mineral s Management Service Alaska OCS Region Any use of trade names is for descriptive purposes only and does not constitute endorsement of these products by the Minerals Management Service. Engl ish-Metric Conversion (The following table gives the factors used to convert English units to metric units.) -- - -- - - - - -- multiply English units by to obtain metric units feet meters miles (statute) ki1 ometers acres hectares barrel s (U .S. petrol eum) 1i ters cubic meters inches centimeters pounds per gallon grams per cubic centimeter knots kilometers per hour miles per hour kilometers per hour square miles square ki1 ometers To convert from Fahrenheit (OF) to Celsius (OC), subtract 32 then divide by 1.8, - Abbreviations and Acronyms AAPG Arneri can As soci ati on of Petroleum Geol ogi sts aff. affinis (to have affinities with) APD Appl icdL ior~for Permit to Drill ARC0 Atlantic Richfield Company BHT Bottom Hole Temperature bop. before present BS R Bottom-Simulati ng Ref lector C carbon OC degrees Celsius CDP common depth point cf. confer (to be compared with) Co. Company c ommun . communication COST Continental Offshore Stratigraphic Test 0 darcy, darci es D downthrown DS T Drill Stem Test e, E early, Early E east Abbreviations and Acronyms--Continued EA Environmental Assessment ed . edi tor(s ) , edited by " F degrees Fahrenheit fig. figure ft. -
The "Lost Inca Plateau": Cause of Flat Subduction Beneath Peru? M.-A
Earth and Planetary Science Letters Archimer http://www.ifremer.fr/docelec/ SEP 1999; 171(3) : 335-341 Archive Institutionnelle de l’Ifremer http://dx.doi.org/10.1016/S0012-821X(99)00153-3 © 1999 Elsevier ailable on the publisher Web site The “lost Inca Plateau”: cause of flat subduction beneath Peru? M. -A. Gutschera, *, J. -L. Olivetb, D. Aslanianb, J. -P. Eissenc and R. Mauryd a Laboratorie de Géophysique et Tectonique, Université Montpellier II, France b IFREMER, Brest, France c IRD, Brest, France d Université de Bretagne Occidentale, Brest, France *: Corresponding author : IRD Centre de Bretagne (ex ORSTOM), B.P. 70, 29280 Plouzane, France. Tel.: +33 blisher-authenticated version is av 298 22 46 68; Fax: +33 298 224514, E-mail: [email protected] Abstract: Since flat subduction of the Nazca Plate beneath Peru was first recognized in the 1970s and 1980s a satisfactory explanation has eluded researchers. We present evidence that a lost oceanic plateau (Inca Plateau) has subducted beneath northern Peru and propose that the combined buoyancy of Inca Plateau and Nazca Ridge in southern Peru supports a 1500 km long segment of the downgoing slab and shuts off arc volcanism. This conclusion is based on an analysis of the seismicity of the subducting Nazca Plate, the structure and geochemistry of the Marquesas Plateau as well as tectonic reconstructions of the Pacific–Farallon spreading center 34 to 43 Ma. These restore three sub–parallel Pacific oceanic plateaus; the Austral, Tuamotu and Marquesas, to two Farallon Plate counterparts; the Iquique and Nazca Ridges. Inca Plateau is apparently the sixth and missing piece in an ensemble of ‘V-shaped' hotspot tracks formed at on-axis positions. -
Geologic History of Siletzia, a Large Igneous Province in the Oregon And
Geologic history of Siletzia, a large igneous province in the Oregon and Washington Coast Range: Correlation to the geomagnetic polarity time scale and implications for a long-lived Yellowstone hotspot Wells, R., Bukry, D., Friedman, R., Pyle, D., Duncan, R., Haeussler, P., & Wooden, J. (2014). Geologic history of Siletzia, a large igneous province in the Oregon and Washington Coast Range: Correlation to the geomagnetic polarity time scale and implications for a long-lived Yellowstone hotspot. Geosphere, 10 (4), 692-719. doi:10.1130/GES01018.1 10.1130/GES01018.1 Geological Society of America Version of Record http://cdss.library.oregonstate.edu/sa-termsofuse Downloaded from geosphere.gsapubs.org on September 10, 2014 Geologic history of Siletzia, a large igneous province in the Oregon and Washington Coast Range: Correlation to the geomagnetic polarity time scale and implications for a long-lived Yellowstone hotspot Ray Wells1, David Bukry1, Richard Friedman2, Doug Pyle3, Robert Duncan4, Peter Haeussler5, and Joe Wooden6 1U.S. Geological Survey, 345 Middlefi eld Road, Menlo Park, California 94025-3561, USA 2Pacifi c Centre for Isotopic and Geochemical Research, Department of Earth, Ocean and Atmospheric Sciences, 6339 Stores Road, University of British Columbia, Vancouver, BC V6T 1Z4, Canada 3Department of Geology and Geophysics, University of Hawaii at Manoa, 1680 East West Road, Honolulu, Hawaii 96822, USA 4College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, 104 CEOAS Administration Building, Corvallis, Oregon 97331-5503, USA 5U.S. Geological Survey, 4210 University Drive, Anchorage, Alaska 99508-4626, USA 6School of Earth Sciences, Stanford University, 397 Panama Mall Mitchell Building 101, Stanford, California 94305-2210, USA ABSTRACT frames, the Yellowstone hotspot (YHS) is on southern Vancouver Island (Canada) to Rose- or near an inferred northeast-striking Kula- burg, Oregon (Fig. -
The Central Asia Collision Zone: Numerical Modelling of the Lithospheric Structure and the Present-Day Kinematics
Th e Central Asia collision zone: numerical modelling of the lithospheric structure and the present - day kinematics Lavinia Tunini A questa tesi doctoral està subjecta a l a llicència Reconeixement - NoComercial – SenseObraDerivada 3.0. Espanya de Creative Commons . Esta tesis doctoral está sujeta a la licencia Reconocimiento - NoComercial – SinObraDerivada 3.0. España de Creative Commons . Th is doctoral thesis is license d under the Creative Commons Attribution - NonCommercial - NoDerivs 3.0. Spain License . The Central Asia collision zone: numerical modelling of the lithospheric structure and the present-day kinematics Ph.D. thesis presented at the Faculty of Geology of the University of Barcelona to obtain the Degree of Doctor in Earth Sciences Ph.D. student: Lavinia Tunini 1 Supervisors: Tutor: Dra. Ivone Jiménez-Munt 1 Prof. Dr. Juan José Ledo Fernández 2 Prof. Dr. Manel Fernàndez Ortiga 1 1 Institute of Earth Sciences Jaume Almera 2 Department of Geodynamics and Geophysics of the University of Barcelona This thesis has been prepared at the Institute of Earth Sciences Jaume Almera Consejo Superior de Investigaciones Científicas (CSIC) March 2015 Alla mia famiglia La natura non ha fretta, eppure tutto si realizza. – Lao Tzu Agradecimientos En mano tenéis un trabajo de casi 4 años, 173 páginas que no hubieran podido salir a luz sin el apoyo de quienes me han ayudado durante este camino, permitiendo acabar la Tesis antes que la Tesis acabase conmigo. En primer lugar quiero agradecer mis directores de tesis, Ivone Jiménez-Munt y Manel Fernàndez. Gracias por haberme dado la oportunidad de entrar en el proyecto ATIZA, de aprender de la modelización numérica, de participar a múltiples congresos y presentaciones, y, mientras, compartir unas cervezas. -
Dynamic Subsidence of Eastern Australia During the Cretaceous
Gondwana Research 19 (2011) 372–383 Contents lists available at ScienceDirect Gondwana Research journal homepage: www.elsevier.com/locate/gr Dynamic subsidence of Eastern Australia during the Cretaceous Kara J. Matthews a,⁎, Alina J. Hale a, Michael Gurnis b, R. Dietmar Müller a, Lydia DiCaprio a,c a EarthByte Group, School of Geosciences, The University of Sydney, NSW 2006, Australia b Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA c Now at: ExxonMobil Exploration Company, Houston, TX, USA article info abstract Article history: During the Early Cretaceous Australia's eastward passage over sinking subducted slabs induced widespread Received 16 February 2010 dynamic subsidence and formation of a large epeiric sea in the eastern interior. Despite evidence for Received in revised form 25 June 2010 convergence between Australia and the paleo-Pacific, the subduction zone location has been poorly Accepted 28 June 2010 constrained. Using coupled plate tectonic–mantle convection models, we test two end-member scenarios, Available online 13 July 2010 one with subduction directly east of Australia's reconstructed continental margin, and a second with subduction translated ~1000 km east, implying the existence of a back-arc basin. Our models incorporate a Keywords: Geodynamic modelling rheological model for the mantle and lithosphere, plate motions since 140 Ma and evolving plate boundaries. Subduction While mantle rheology affects the magnitude of surface vertical motions, timing of uplift and subsidence Australia depends on plate boundary geometries and kinematics. Computations with a proximal subduction zone Cretaceous result in accelerated basin subsidence occurring 20 Myr too early compared with tectonic subsidence Tectonic subsidence calculated from well data. -
Measurements of Upper Mantle Shear Wave Anisotropy from a Permanent Network in Southern Mexico
GEOFÍSICA INTERNACIONAL (2013) 52-4: 385-402 ORIGINAL PAPER Measurements of upper mantle shear wave anisotropy from a permanent network in southern Mexico Steven A. C. van Benthem, Raúl W. Valenzuela* and Gustavo J. Ponce Received: November 13, 2012; accepted: December 14, 2012; published on line: September 30, 2013 Resumen Abstract Se midió la anisotropía para las ondas de cortante 8SSHU PDQWOH VKHDU ZDYH DQLVRWURS\ XQGHU en el manto superior por debajo de estaciones VWDWLRQVLQVRXWKHUQ0H[LFRZDVPHDVXUHGXVLQJ en el sur de México usando fases SKS. Las records of SKS phases. Fast polarization directions direcciones de polarización rápida donde la placa ZKHUHWKH&RFRVSODWHVXEGXFWVVXEKRUL]RQWDOO\ de Cocos se subduce subhorizontalmente están are oriented in the direction of the relative orientadas aproximadamente paralelas con el PRWLRQEHWZHHQWKH&RFRVDQG1RUWK$PHULFDQ movimiento relativo entre las placas de Cocos y plates, and are trench-perpendicular. This América del Norte y además son perpendiculares SDWWHUQLVLQWHUSUHWHGDVVXEVODEHQWUDLQHGÀRZ DODWULQFKHUD3RUORWDQWRVHLQ¿HUHTXHODSODFD and is similar to that observed at the Cascadia VXEGXFLGD DUUDVWUD HO PDQWR TXH VH HQFXHQWUD subduction zone. Earlier studies have pointed SRUGHEDMR\ORKDFHÀXLU HQWUDLQHGÀRZ 8QD out that both regions have in common the young situación similar existe en la zona de subducción age of the subducting lithosphere. Changes in the GH&DVFDGLD(VWXGLRVSUHYLRVKDQVHxDODGRTXH RULHQWDWLRQRIWKHIDVWD[HVDUHREVHUYHGZKHUH estas dos regiones tienen en común la subducción the subducting