Show simple item record

dc.contributor.authorSarkar, Sudipta
dc.contributor.authorMoser, Manuel
dc.contributor.authorBerndt, Christian
dc.contributor.authorDoll, Mechthild
dc.contributor.authorBöttner, Christoph
dc.contributor.authorChi, Wu-Cheng
dc.contributor.authorKlaeschen, Dirk
dc.contributor.authorGalerne, Christophe
dc.contributor.authorKarstens, Jens
dc.contributor.authorGeilert, Sonja
dc.contributor.authorMortera-Gutierrez, C.
dc.contributor.authorHensen, Christian
dc.date.accessioned2022-09-07T07:50:44Z
dc.date.available2022-09-07T07:50:44Z
dc.date.issued2022-08-20
dc.description.abstractSeafloor heat flow provides information about the thermal evolution of the lithosphere, the magnitude and timing of volcanic activity, and hydrothermal circulation patterns. In the central Gulf of California, the Guaymas Basin is part of a young marginal spreading rift system that experiences high sedimentation (1–5 km/Myr) and widespread magmatic intrusions in the axial troughs and the off-axis regions. Heat flow variations record magmatic and sedimentary processes affecting the thermal evolution of the basin. Here, we present new seismic evidence of a widespread bottom-simulating reflection (BSR) in the northwestern Guaymas Basin. Using the BSR depths and thermal conductivity measurements, we determine geothermal gradient and surface heat flow variations. The BSR-derived heat flow values are less than the conductive lithospheric heat flow predictions for mid-oceanic ridges. They suggest that high sedimentation (0.3–1 km/Myr) suppresses the lithospheric heat flow. In the central and southeastern regions of the basin, the BSR-derived geothermal gradient increases as the intruded magmatic units reach shallower subsurface depths. Thermal modeling shows that recent (<5000 years) igneous intrusions (<500 m below the seafloor) and associated fluid flow elevate the surface heat flow up to five times. BSR-derived geothermal gradients correlate little with the depth of the shallowest magmatic emplacements to the north, where the intrusions have already cooled for some time, and the associated hydrothermal activity is about to shut downen_US
dc.identifier.citationSarkar S, Moser M, Berndt C, Doll, Böttner C, Chi, Klaeschen D, Galerne C, Karstens J, Geilert S, Mortera-Gutierrez, Hensen C. Thermal state of the Guaymas Basin derived from gas hydrate bottom simulating reflections and heat flow measurements. Journal of Geophysical Research (JGR): Solid Earth. 2022;127en_US
dc.identifier.cristinIDFRIDAID 2046193
dc.identifier.doi10.1029/2021JB023909
dc.identifier.issn2169-9313
dc.identifier.issn2169-9356
dc.identifier.urihttps://hdl.handle.net/10037/26701
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalJournal of Geophysical Research (JGR): Solid Earth
dc.relation.projectIDNorges forskningsråd: 223259en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.titleThermal state of the Guaymas Basin derived from gas hydrate bottom simulating reflections and heat flow measurementsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record