Secular variation in carbon uptake into the ocean crust

Gillis, K. M.; Coogan, L. A.

doi:10.1016/j.epsl.2010.12.030

Cited by 105 publications

(146 citation statements)

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“…Taken together, we conclude that the investigated calcite veins most likely precipitated shortly or within a few millions years after the formation of the Shatsky Rise volcanic edifices. Such interpretation is consistent with previous suggestions that secondary carbonate formation largely occurs within ≤10 Myr (Staudigel et al, 1981;Coggon and Teagle, 2011) or <20 Myr (Gillis and Coogan, 2011) after oceanic crust formation.…”

Section: Accepted M Manuscriptsupporting

confidence: 81%

Composition and timing of carbonate vein precipitation within the igneous basement of the Early Cretaceous Shatsky Rise, NW Pacific

Geldmacher

Hauff

et al. 2014

Marine Geology

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Section: Accepted M Manuscriptsupporting

confidence: 81%

Composition and timing of carbonate vein precipitation within the igneous basement of the Early Cretaceous Shatsky Rise, NW Pacific

Geldmacher

Hauff

et al. 2014

Marine Geology

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“…The oceanic crust is a significant global sink for carbon, and carbonate is more abundant in the volcanic section of crust formed at slow spreading rates than in upper crust formed at intermediate and fast spreading rates (Alt & Teagle, 1999;Gillis & Coogan, 2011). Vein carbonates recovered from core samples of the oceanic crust are valuable recorders of fluid chemical evolution as the seafloor ages, indicating variations in both crustal and seawater composition and temperature (e.g., Expedition 301 carbonates, Coggon et al, 2004Coggon et al, , 2010Gillis & Coogan, 2011;Rausch, Böhm, Bach, Klügel, & Eisenhauer, 2013).…”

Section: 23)mentioning

confidence: 99%

“…Vein carbonates recovered from core samples of the oceanic crust are valuable recorders of fluid chemical evolution as the seafloor ages, indicating variations in both crustal and seawater composition and temperature (e.g., Expedition 301 carbonates, Coggon et al, 2004Coggon et al, , 2010Gillis & Coogan, 2011;Rausch, Böhm, Bach, Klügel, & Eisenhauer, 2013).…”

Section: 23)mentioning

confidence: 99%

Hydrogeologic Properties, Processes, and Alteration in the Igneous Ocean Crust

Fisher

Alt

Bach

2014

Earth and Life Processes Discovered From Subseafloor Environments - A Decade of Science Achieved by the Integrated Ocean Drilli

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“…Furthermore, the lower carbonate content in the 2.6 Ga greenstones compared to those in the 3.5 and 3.2 Ga greenstones indicated that the CO 2 concentration in seawater decreased during Late Archean period-possibly caused by the formation and breakdown of the supercontinent at around 2.7 Ga (Shibuya et al 2013a). However, there are no data for the carbonation of subseafloor crust after 2.6 Ga, although the data from the DSDP/ODP drill cores have been obtained from the Phanerozoic crusts (Alt and Teagle 1999;Gillis and Coogan 2011).…”

Section: Introductionmentioning

confidence: 99%

Weak hydrothermal carbonation of the Ongeluk volcanics: evidence for low CO2 concentrations in seawater and atmosphere during the Paleoproterozoic global glaciation

Shibuya

Komiya

Takai

et al. 2017

Prog Earth Planet Sci

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It was previously revealed that the total CO 2 concentration in seawater decreased during the Late Archean. In this paper, to assess the secular change of total CO 2 concentration in seawater, we focused on the Paleoproterozoic era when the Earth experienced its first recorded global glaciation. The 2.4 Ga Ongeluk Formation outcrops in the Kaapvaal Craton, South Africa. The formation consists mainly of submarine volcanic rocks that have erupted during the global glaciation. The undeformed lavas are mostly carbonate-free but contain rare disseminated calcites. The carbon isotope ratio of the disseminated calcite (δ 13 C cc vs. VPDB) ranges from − 31.9 to − 13.2 ‰. The relatively low δ 13 C cc values clearly indicate that the carbonation was partially contributed by 13 C-depleted CO 2 derived from decomposition of organic matter beneath the seafloor. The absence of δ 13 C cc higher than − 13.2‰ is consistent with the exceptionally 13 C-depleted CO 2 in the Ongeluk seawater during glaciation. The results suggest that carbonation occurred during subseafloor hydrothermal circulation just after the eruption of the lavas. Previously, it was reported that the carbonate content in the uppermost subseafloor crust decreased from 3.2 to 2.6 Ga, indicating a decrease in total CO 2 concentration in seawater during that time. However, the average CO 2 (as carbonate) content in the Ongeluk lavas (< 0.001 wt%) is much lower than those of 2.6 Ga representatives and even of modern equivalents. This finding suggests that the total CO 2 concentration in seawater further decreased during the period between 2.6 and 2.4 Ga. Thus, the very low content of carbonate in the Ongeluk lavas is probable evidence for the extremely low CO 2 concentration in seawater during the global glaciation. Considering that the carbonate content of the subseafloor crusts also shows a good correlation with independently estimated atmospheric pCO 2 levels through the Earth history, it seem highly likely that the low carbonate content in the Ongeluk lavas reflects the low atmospheric pCO 2 at that time. We conclude that the continuous decrease in CO 2 concentration of seawater/atm. from 3.2 Ga was one of the contributing factors to the Paleoproterozoic global glaciation.

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Secular variation in carbon uptake into the ocean crust

Cited by 105 publications

References 32 publications

Composition and timing of carbonate vein precipitation within the igneous basement of the Early Cretaceous Shatsky Rise, NW Pacific

Composition and timing of carbonate vein precipitation within the igneous basement of the Early Cretaceous Shatsky Rise, NW Pacific

Hydrogeologic Properties, Processes, and Alteration in the Igneous Ocean Crust

Weak hydrothermal carbonation of the Ongeluk volcanics: evidence for low CO2 concentrations in seawater and atmosphere during the Paleoproterozoic global glaciation

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