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| Villar-muñoz, Lucía; Vargas-cordero, Iván; Bento, Joaquim; Tinivella, Umberta; Fernandoy, Francisco; Giustiniani, Michela; Behrmann, Jan; Calderón-díaz, Sergio. |
| Large amounts of gas hydrate are present in marine sediments offshore Taitao Peninsula, near the Chile Triple Junction. Here, marine sediments on the forearc contain carbon that is converted to methane in a regime of very high heat flow and intense rock deformation above the downgoing oceanic spreading ridge separating the Nazca and Antarctic plates. This regime enables vigorous fluid migration. Here, we present an analysis of the spatial distribution, concentration, estimate of gas-phases (gas hydrate and free gas) and geothermal gradients in the accretionary prism, and forearc sediments offshore Taitao (45.5°–47° S). Velocity analysis of Seismic Profile RC2901-751 indicates gas hydrate concentration values <10% of the total rock volume and extremely... |
| Tipo: Text |
Palavras-chave: BSR; Gas hydrate; Methane; Seepage; Active margin; Chile Triple Junction. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00475/58678/61173.pdf |
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