Heat flow and 2D multichannel seismic reflection survey of the Devil's Hole geothermal reservoir in the Wagner basin, northern Gulf of California

Peña-Domínguez, Juan Gerardo; Negrete-Aranda, R.; Neumann, Florian; Contreras, Juan; Spelz, Ronald M.; Vega-Ramirez, L. A.; González‐Fernández, Antonio

doi:10.1016/j.geothermics.2022.102415

Cited by 6 publications

(1 citation statement)

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“…Although these rates are enough to decrease heat flow by 8% and 20%, respectively (see Figure S2 and Table S2 in Supplemental Information), they appear to be on the low side. For example, heat suppression in the Wagner Basin in the northern GOC, whose tectonostratigraphy might be analogous to the central GB, can be as high as 50% (Neumann et al, 2017; Peña‐Domínguez et al, 2022). In either case, the corrected heat flow would still be lower than that predicted by the cooling model.…”

Section: Discussionmentioning

confidence: 99%

Heat flow and thermal regime in the Guaymas Basin, Gulf of California: Estimates of conductive and advective heat transport

et al. 2023

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Heat flow is estimated at eight sites drilled int the Guaymas Basin, Gulf of California, during the International Ocean Discovery Program Expedition 385. The expedition sought to understand the thermal regime of the basin and heat transfer between off‐axis sills intruding the organic‐rich sediments of the Guaymas Basin, and the basin floor. The distinct sedimentation rates, active tectonics, and magmatism make the basin interesting for scientific discoveries. Results show that sedimentation corrected heat flow values range 119–221 mW/m2 in the basin and 257–1003 mW/m2 at the site of a young sill intrusion, denominated Ringvent. Thermal analysis shows that heat in the Guaymas Basin is being dissipated by conduction for plate ages >0.2 Ma, whereas younger plate ages are in a state of transient cooling by both conduction and advection. Drilling sites show that Ringvent is an active sill being cooled down slowly by circulating fluids with discharge velocities of 10–200 mm/yr. Possible recharge sites are located ca. 1 km away from the sill's border. Modelling of the heat output at Ringvent indicates a sill thickness of ca. 240 m. A simple order‐of‐magnitude model predicts that relatively small amounts of magma are needed to account for the elevated heat flow in non‐volcanic, sediment‐filled rifts like the central and northern Gulf of California in which heating of the upper crust is achieved via advection by sill emplacement and hydrothermal circulation. Multiple timescales of cooling control the crustal, chemical and biological evolution of the Guaymas Basin. Here, we recognize at least four timescales: the time interval between intrusions (ca. 103 yr), the thermal relaxation time of sills (ca. 104 yr), the characteristic cooling time of the sediments (ca. 105 yr), and the cooling of the entire crust at geologic timescales.

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Section: Discussionmentioning

confidence: 99%