Cited by 129Geochemistry and Elemental AnalysisPaleontology and Stratigraphy of FossilsGeological and Geophysical Studies

Low-Temperature Alteration of the Seafloor: Impacts on Ocean Chemistry

Coogan, Laurence A., Gillis, Kathryn M.·2018·Annual Review of Earth and Planetary Sciences

Abstract

Over 50% of Earth is covered by oceanic crust, the uppermost portion of which is a high-permeability layer of basaltic lavas through which seawater continuously circulates. Fluid flow is driven by heat lost from the oceanic lithosphere; the global fluid flux is dependent on plate creation rates and the thickness and distribution of overlying sediment, which acts as a low-permeability layer impeding seawater access to the crust. Fluid-rock reactions in the crust, and global chemical fluxes, depend on the average temperature in the aquifer, the fluid flux, and the composition of seawater. The average temperature in the aquifer depends largely on bottom water temperature and, to a lesser extent, on the average seafloor sediment thickness. Feedbacks between off-axis chemical fluxes and their controls may play an important role in modulating ocean chemistry and planetary climate on long timescales, but more work is needed to quantify these feedbacks.

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Registry

Crossref · 10.1146/annurev-earth-082517-010027

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  • Seafloor weathering occurs when water in the permeable abyssal plains dissolves basaltic minerals, releasing calcium ions and precipitating calcium carbonate in veins and pores.

    “Seafloor weathering occurs when water in the permeable abyssal plains dissolves basaltic minerals, releasing calcium ions and precipitating calcium carbonate in veins and pores (175).”

    From The Archean atmosphere (2020) · cites this paper as [175]

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Authors
Coogan, L. A., & Gillis, K. M.
Affiliations
University of Victoria (CA)
Venue
Annual Review of Earth and Planetary Sciences
Published
2018-05-30
Volume
46
Issue
1
Pages
21-45
ISSN
  • 0084-6597 (ISSN-L)
  • 1545-4495
OpenAlex
W2792378909
Cited by
129
References
106
Citations by year
2026: 13 · 2025: 19 · 2024: 24 · 2023: 11 · 2022: 15 · 2021: 22 · 2020: 14 · 2019: 9 · 2018: 2
FWCI
2.03
Type
journal article
Language
en
Open access
closed
Locations
Annual Review of Earth and Planetary Sciences (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geochemistry and Elemental Analysis
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geology › Geological and Geophysical Studies
Keywords
low-temperature alteration, ocean floor, oceanic crust, basaltic aquifers, ocean circulation, fluid-rock interaction, chemical fluxes, bottom water temperature, sediment thickness, seawater chemistry, climate feedbacks, plate tectonics

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