Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions

DeMets, Charles; Gordon, Richard G.; Argus, Donald F.; Stein, Seth

doi:10.1029/94gl02118

Cited by 3,163 publications

(2,223 citation statements)

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“…The westernmost part of the Mediterranean is a region of a great research interest due to its complex geodynamic setting. Several models constructed from geophysical and geologic data have been proposed for the present-day geodynamic setting of the region (Argus et al, 1989;Dewey et al, 1989;DeMets et al, 1994;Calais et al, 2003). More recently, new geodetic data have been used to improve these models (McClusky et al, 2003;Nocquet and Calais, 2003;Stich et al, 2006;Fadil et al, 2006;Serpelloni et al, 2007;Fernandes et al, 2007;Tahayt et al, 2008;Perez-Peña et al, 2010;Vernant et al, 2010;Palano et al, 2011;Koulali et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Sánchez‐Alzola

Sánchez

Giménez

et al. 2014

Journal of Geodynamics

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Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010)(2011)(2012)(2013), Journal of Geodynamics (2014), http://dx.doi.org/10. 1016/j.jog.2014.05.005 This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. AbstractIn this paper, we present a first estimation, using the GIPSY-OASIS software, of the crustal velocity and strain rate fields in the Balearic Islands (Spain), based on continuous GPS observations from the XGAIB network spanning the period 2010-2013. The XGAIB network consists of nine permanent, widely distributed stations that have operated continuously since 2010. In this paper, we describe the XGAIB network and the CGPS data processing and present our principle results in terms of the position time series and velocities of all of the sites, which were observed for more than three and a half years. In addition, strain tensors were estimated from the velocity field to obtain the first realistic crustal deformation model of the archipelago.The strains exhibit gradual variation across the Balearic Islands, from WNW-ESE extension in the southwest (Ibiza and Formentera) to NW-SE compression in the A c c e p t e d M a n u s c r i p t 2 northeast (Menorca). These results constitute an advance in our knowledge of the tectonics of the western Mediterranean region. Highlights-We model the crustal velocity and strain rate fields in the Balearic Islands.-We use continuous GPS observations from a permanent GNSS network.-The strains exhibit gradual variation from WNW-ESE in the southwest to NW-SE in the northeast.

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Section: Introductionmentioning

confidence: 99%

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Sánchez‐Alzola

Sánchez

Giménez

et al. 2014

Journal of Geodynamics

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“…In terms of global kinematics, our data show that, on average, the Suez-Sinai area motion (ITRF00 velocities) matches the African plate motion defined by the NNR-NUVEL-1A model [De Mets et al, 1994], even if space geodetic rates result on average slower than those predicted by about 7% (Figure 3). …”

Section: Data Processingmentioning

confidence: 63%

Current motion and short-term deformations in the Suez–Sinai area from GPS observations

Riguzzi

Pietrantonio

Piersanti

et al. 2006

Journal of Geodynamics

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SUMMARYWe analyze data from four GPS campaigns carried out between 1997 and 2002 on a network of 11 sites in the Suez-Sinai, the area of collision between the African and the Arabian plates. This is the key area to understand how and in which way Sinai behaves like a sub-plate of the African plate and the role played between seismic and geodetic (long term) deformation release.Our analysis shows that, on average, the Suez-Sinai area motion (in terms of ITRF00 velocities) matches African plate motion (NNR-NUVEL-1A model).However, the baseline length variations show transient deformations in Sinai and across the Gulf of Suez, reaching up a maximum value of about 1.5 cm in five years.Since current geodynamical models do not predict significant tectonic deformation in this area, we worked under the hypothesis that a contribute may be due to post-seismic relaxation. However, since the modelled post-seismic effect results modest and a certain amount of the detected deformation is not accounted for, we think that an improved modelling should take into account the lateral heterogeneities of crust and upper mantle structures.

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“…12.4c). Interestingly, it is generally accepted that OCCs occur only in slow-to ultra-slow-spreading ridges under magmastarved conditions (Escartin et al 2003;Cannat et al 2006), whereas the CIR has been classified as an intermediate-spreading ridge with a spreading speed of 47.5 mm/year (DeMets et al 1994).…”

Section: Kairei Hydrothermal Fieldmentioning

confidence: 99%

Indian Ocean Hydrothermal Systems: Seafloor Hydrothermal Activities, Physical and Chemical Characteristics of Hydrothermal Fluids, and Vent-Associated Biological Communities

Nakamura

Takai

2014

Subseafloor Biosphere Linked to Hydrothermal Systems

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In the nearly 40 years since the discovery of the deep-sea hydrothermal vent site at the Galápagos spreading center, more than 300 sites of high-temperature hydrothermal venting have been discovered and investigated around the world. Surprisingly, however, most of these sites are located in the Pacific and Atlantic Oceans, whereas only five hydrothermal vent sites have been discovered in the Indian Ocean. During the TAIGA project, we conducted four research cruises to investigate four of the five Indian Ocean hydrothermal vent sites (two of which were newly discovered during one of the TAIGA cruises) located along the Central Indian Ridge (CIR). The results of geological and geochemical analyses demonstrate wide variation in fluid chemistry, reflecting the diverse geological background of the CIR hydrothermal vent fields. Although the CIR is an intermediate-spreading ridge, the geological and geochemical features of the Kairei hydrothermal field appear to be similar to ultramafic rock-hosted hydrothermal fields found along the slow-spreading Mid-Atlantic Ridge (MAR). By contrast, the Dodo hydrothermal field shares similarities with the hydrothermal vent sites found along the fast-spreading East Pacific Rise. The Solitaire and Edmond hydrothermal fields are characterized by high pH and Cl levels, respectively, although the geological background underlying the unusual chemistry of their hydrothermal fluids is still uncertain. Additionally, extensive microbiological analyses of the Kairei hydrothermal vent site revealed that its microbial communities are affected by the chemical characteristics of the hydrothermal vent fluids. Macrofaunal analyses also revealed new faunal data for the Indian Ocean hydrothermal vents, including novel genera and families that are potentially indigenous to the Indian Ocean hydrothermal systems. In particular, the discovery and characterization of a new morphotype of "scaly-foot" gastropod raises the question of the mechanism and physiological role of iron sulfide mineralization. The results of our investigations extended knowledge of the Indian Ocean hydrothermal systems including geochemical variations of hydrothermal fluids, their relationships to the geological

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Effect of recent revisions to the geomagnetic reversal time scale on estimates of current plate motions

Cited by 3,163 publications

References 18 publications

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Crustal velocity and strain rate fields in the Balearic Islands based on continuous GPS time series from the XGAIB network (2010–2013)

Current motion and short-term deformations in the Suez–Sinai area from GPS observations

Indian Ocean Hydrothermal Systems: Seafloor Hydrothermal Activities, Physical and Chemical Characteristics of Hydrothermal Fluids, and Vent-Associated Biological Communities

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