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	Provedor de dados 5 (3) Autor Maia, M. (3) Bollinger, C. (1) Cali, J. (1) D'Eu, J. F. (1) Graham, D.w. (1) Guillou, H. (1) Hemond, C. (1) Janin, M. (1) Johnson, K. T. M. (1) Liorzou, C. (1) Mittelstaedt, E. (1) Mudholkar, A. (1) Roussel, C (1) Sibrant, A.l.r. (1) Verdun, J. (1) Mais... Palavra-chave Amsterdam-St (1) Autonomous Underwater Vehicle (1) Capricorn plate (1) Electrostatic accelerometer (1) Geophysical and geochemical evidence (1) Hot spot (1) Indian Ocean (1) K-Ar geochronology (1) Moving vectorial gravimetry and gradiometry (1) Oceanic plateaus (1) Paul Plateau (1) Plume-ridge interaction (1) Ridge–hot spot interaction (1) SEIR (1) South East Indian Ridge (1) Unscented Kalman filtering (1) Ywords (1) Mais... Tipo do documento Text (3) Ano 2019 (1) 2015 (1) 2011 (1) País France (3) Idioma Inglês (3)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 3 Primeira ... 1 ... Última Variable crustal production originating from mantle source heterogeneity beneath the South East Indian Ridge and Amsterdam‐St. Paul Plateau 5 Sibrant, A.l.r.; Maia, M.; Mittelstaedt, E.; Graham, D.w.. The Amsterdam‐St. Paul (ASP) Plateau formed by interaction between the South East Indian Ridge (SEIR) and the ASP mantle plume during the last 10 Myr. The combined bathymetry and gravity‐derived crustal thickness anomalies along the present and paleoaxes of the SEIR atop the plateau indicate: (1) a thicker crust and shallower water depth along the southern part of segment I2 during much of the last 10 Myr; (2) an earlier decrease (~1.4 Ma) in crustal thickness along the southern part of I2 compared to the northern part (~0.9 Ma) during the most recent period of reduced magmatism; (3) a topographic transition at ~0.7 Ma and during the last 0.1 Myr; and (4) an approximately uniform crustal thickness (8 km) along the entire I2 segment today. These... Tipo: Text Palavras-chave: Ywords; Oceanic plateaus; Plume-ridge interaction; Amsterdam-St; Paul Plateau; South East Indian Ridge; Geophysical and geochemical evidence. Ano: 2019 URL: https://archimer.ifremer.fr/doc/00587/69863/67761.pdf Integration of a strapdown gravimeter system in an autonomous underwater vehicle 5 Roussel, C; Verdun, J.; Cali, J.; Maia, M.; D'Eu, J. F.. We present a new mobile instrument for measuring dynamically the gravity vector and its gradients in underwater environment, named GRAVIMOB. Our instrument is a strapdown sensor, consisted of electrostatic accelerometers installed in a waterproof sphere. It is designed to be embedded in an Autonomous Underwater Vehicle (AUV). Since the positioning of an AUV is approximate in underwater environment, the key issue raised here is to estimate the uncertainty in the gravity field resulting from the use of such position data. This paper focuses on the assessment of the system performances. The latter have been studied by simulation with reference data calculated from actual submarine geological structures, on which different noise models have been added. Results... Tipo: Text Palavras-chave: Autonomous Underwater Vehicle; Moving vectorial gravimetry and gradiometry; Electrostatic accelerometer; Unscented Kalman filtering. Ano: 2015 URL: https://archimer.ifremer.fr/doc/00639/75147/75504.pdf Hot spot activity and tectonic settings near Amsterdam-St. Paul plateau (Indian Ocean) 5 Janin, M.; Hemond, C.; Guillou, H.; Maia, M.; Johnson, K. T. M.; Bollinger, C.; Liorzou, C.; Mudholkar, A.. The Amsterdam-St. Paul (ASP) plateau is located in the central part of the Indian Ocean and results from the interaction between the ASP hot spot and the Southeast Indian Ridge (SEIR). It is located near the diffuse boundary between the Capricorn and Australian plates. The seamount chain of the Dead Poets (CDP) is northeast of the ASP plateau and may represent older volcanism related to the ASP hot spot; this chain consists of two groups of seamounts: (1) large flat-topped seamounts formed 8-10 Ma and (2) smaller conical seamounts formed during the last 2 Myr. The ASP hot spot has produced two pulses of magmatism that have been ponded under the ASP plateau and erupted along the divergent boundary between the Capricorn and Australian plates. The N65 degrees... Tipo: Text Palavras-chave: Ridge–hot spot interaction; K-Ar geochronology; Hot spot; SEIR; Indian Ocean; Capricorn plate. Ano: 2011 URL: https://archimer.ifremer.fr/doc/00213/32469/30938.pdf Registros recuperados: 3 Primeira ... 1 ... Última

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