Results 71 to 80 of about 1,123 (164)

Morphology and tectonics of the Mid-Atlantic Ridge, 7°–12°S

, 2003
We present swath bathymetric, gravity, and magnetic data from the Mid-Atlantic Ridge between the Ascension and the Bode Verde fracture zones, where significant ridge–hot spot interaction has been inferred.
Bijwaard, Bonatti, Bougault, Bourdon, Brozena, Brozena, Bruguier, Cande, Cande, Carlson, Chen, Davies, Delaney, DeMets, Dosso, Fontignie, Graham, Grindlay, Hanan, Heirtzler, Hey, Ito, Ito, J. M. Brozena, Johnson, Kincaid, Klingelhoefer, Kuo, LaBrecque, Macdonald, Malamud, Michael, Miller, Minshull, Minshull, N. J. Bruguier, Naar, Niu, O'Connor, Parker, Parker, Parsons, Phipps Morgan, Reid, Sandwell, Schilling, Schilling, Shen, Shirey, Sleep, Small, T. A. Minshull, Tucholke, van Andel, Verma, Vogt, Wolfe   +56 more
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Origin, structural and tectonic history of the Macquarie Island region [PDF]

, 1988
Macquarie Island, in the Southern Ocean, was formed by oceanic crust uplift due to transpressive forces between the Indian / Australian and Pacific oceanic plates, in a transpressional regime which has persisted over the last 10 Ma. The amount of uplift
Williamson, PE
core   +3 more sources

A Contiguous Taltson‐Thelon Margin Revisited

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 7, July 2024.
Abstract The amalgamation of Laurentia was initiated along the western margin of the Rae craton. However, the tectonic setting that generated magmatic rocks along this margin has long been debated, with the Thelon tectonic zone in the north having formed in an arc setting, and the Taltson magmatic zone in the south variably attributed to either ...
J. A. Cutts, B. V. Dyck, M. G. Perrot, J. H. F. L. Davies, A. M. Osinchuk, D. Šilerová, R. A. Stern, M. Chiaradia, R. Canam   +8 more
wiley   +1 more source

The Architecture of a Root Zone of a Large Magmatic Conduit System From High Resolution Magnetic, Gravity and Petrophysical Data: The Reinfjord Ultramafic Complex

Journal of Geophysical Research: Solid Earth, Volume 129, Issue 4, April 2024.
Abstract The Seiland Igneous Province (SIP) is a large province of mafic and ultramafic (UM) complexes interpreted to be relics of a giant plumbing system feeding the Ediacaran Central Iapetus Magmatic Province. The Reinfjord Ultramafic Complex (RUC) is one of the four major ultramafic complexes of the SIP.
Z. Pastore, N. S. Church, C. Fichler, A. Michels, G. W. ter Maat, R. B. Larsen, S. A. McEnroe   +6 more
wiley   +1 more source

Effective elastic thickness and crustal thickness variations in west central Africa inferred from gravity data

, 1995
International audienceThe west central African region is characterized by various geological features: Cretaceous rifts (Benue), Tertiary domal uplift (Adamawa volcanic uplift), Tertiary-Recent volcanoes (Cameroon Volcanic Line or CVL), Tertiary ...
Diament, M, Ebinger, C.J., Fairhead, J,, Nnange, J.,, Poudjodmj Oma, Y.,   +4 more
core   +3 more sources

Crustal Architecture of the Paleo‐Pacific Rift Margin of East Antarctica: Evidence From U‐Pb Ages and O‐Hf Isotope Compositions of Ross Orogen Granitoids

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 4, April 2024.
Abstract Granitic batholiths of the ∼500 Ma Ross Orogen in Antarctica are voluminous in scale, reflecting prolific magmatism along the active early Paleozoic convergent margin of Gondwana. New age and isotopic analysis of zircons from a large suite of Ross granitoids spanning >2,000 km along the orogen provide a wealth of geochronologic, tracer, and ...
John W. Goodge, C. Mark Fanning, Christopher M. Fisher, Jeffrey D. Vervoort   +3 more
wiley   +1 more source

An airborne geophysical survey of part of west Dyfed, South Wales, and some related ground surveys [PDF]

, 1986
A detailed airborne geophysical survey has been made of part of west Dyfed at a flying height of 75 m with magnetic, electromagnetic (VLF-EM) and radiometric equipment mounted in a helicopter.
Cave, R., Cornwell, J.D.
core  

The joint US/UK 1990 epoch world magnetic model [PDF]

A detailed summary of the data used, analyses performed, modeling techniques employed, and results obtained in the course of the 1990 Epoch World Magnetic Modeling effort are given. Also, use and limitations of the GEOMAG algorithm are presented.
Coleman, Rachel J., Lauber, Stephen E., Peck, Michael R., Quinn, John M.   +3 more
core   +1 more source

Crustal structure from 2-D gravity and magnetic data modeling, magnetic power spectrum inversion, and seismotectonics in the Laguna Salada basin, northern Baja California, Mexico [PDF]

Geofísica Internacional, 2001
We have constructed a 2-D model of the crustal structure that accounts for gravity and aeromagnetic data across the Laguna Salada basin, using independent inferences from seismic refraction studies and the Airy-Heiskanen model of isostatic compensation ...
Víctor Manuel Wong-Ortega, Luis Munguía-Orozco, Juan Manuel Espinosa-Cardeña, Juan García-Abdeslem, Jorge Ramírez-Hernández   +4 more
doaj  

GRAVSAT error analysis by means of global spectral analyses of the marine geoid from SEASAT altimeter data [PDF]

The geographical variability of short wavelength geoid power spectra (geoid roughness), was mapped for the world's oceans between latitudes 72 deg N and 72 deg S. A spectral analysis of SEASAT altimeter data, reduced to sea surface heights, was performed

core   +1 more source