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- Carbonate–silicate_cycle abstract "The carbonate–silicate geochemical cycle describes the transformation of silicate rocks to carbonate rocks by weathering and sedimentation at Earth's surface and the transformation of carbonate rocks back into silicates by metamorphism and magmatism. It plays a large part in the carbon cycle, since the equilibrium point of the carbonate-silicate cycle dictates the pace of carbon release from the lithosphere.The carbonate-silicate cycle involves several chemical reactions that occur in different environments. In the atmosphere, gaseous carbon dioxide (CO2) dissolves in rainwater, forming natural carbonic acid (H2CO3). This weak acid weathers silicate rocks on continents, slowly dissolving the rock and releasing aqueous minerals through the chemical reaction CaSiO3(s) (wollastonite) + 2CO2(g) + H2O(l) → Ca2+(aq) + 2HCO3- (aq) (bicarbonate) + SiO2(aq) (dissolved silica). These dissolved minerals are eventually carried by water to the ocean, where they are used by living organisms such as foraminifera, radiolarians, coccolithopores, and diatoms to create shells of CaCO3 (calcite) or SiO2 (opal) through the reactions Ca2+ (aq) + 2HCO3-(aq) → CaCO3(s) + CO2(g) + H2O(l) (for calcite precipitation) and SiO2(aq) → SiO2(s) (for opal precipitation). When these organisms die, many shells are remineralized but some shells fall all the way to the sea floor and are buried. The cycle is completed when the sea floor is subducted and carbonate minerals recombine with silicate minerals under temperatures above 300 °C to reform calcium silicates and release gaseous CO2 through volcanism (CaCO3(s) + SiO2(s) → CaSiO3(s) + CO2(g)).The carbonate-silicate cycle effects the global carbon cycle as carbon dioxide is removed from the Earth's surface through the burial of weathered minerals in deep ocean sediments and returned to the atmosphere through metamorphism and volcanism. However, this process is far from being a closed loop. In Earth history generally the formation of carbonates significantly outpaces the formation of silicates, effectively removing carbon dioxide from the atmosphere. Because carbon dioxide is a potent greenhouse gas, the carbonate-silicate cycle is suspected to initiate ice ages by creating a negative feedback on the global temperature with a typical time scale of a few million years that is capable of countering water vapor and carbon dioxide short-term positive feedback on global temperature.The carbonate-silicate cycle equilibrium point is shifted on Venus due to surface temperatures above 300 °C , which favor the formation of calcium silicates over weathering. Thus, Venus has a high-density carbon-dioxide atmosphere.".
- Carbonate–silicate_cycle wikiPageID "21051206".
- Carbonate–silicate_cycle wikiPageLength "5678".
- Carbonate–silicate_cycle wikiPageOutDegree "42".
- Carbonate–silicate_cycle wikiPageRevisionID "703392704".
- Carbonate–silicate_cycle wikiPageWikiLink Atmosphere_of_Earth.
- Carbonate–silicate_cycle wikiPageWikiLink Atmosphere_of_Venus.
- Carbonate–silicate_cycle wikiPageWikiLink Calcite.
- Carbonate–silicate_cycle wikiPageWikiLink Carbon_cycle.
- Carbonate–silicate_cycle wikiPageWikiLink Carbon_dioxide.
- Carbonate–silicate_cycle wikiPageWikiLink Carbonate_rock.
- Carbonate–silicate_cycle wikiPageWikiLink Carbonic_acid.
- Carbonate–silicate_cycle wikiPageWikiLink Category:Climate_forcing_agents.
- Carbonate–silicate_cycle wikiPageWikiLink Category:Climate_history.
- Carbonate–silicate_cycle wikiPageWikiLink Category:Geochemistry.
- Carbonate–silicate_cycle wikiPageWikiLink Chemical_reaction.
- Carbonate–silicate_cycle wikiPageWikiLink Closed_ecological_system.
- Carbonate–silicate_cycle wikiPageWikiLink Coccolithophore.
- Carbonate–silicate_cycle wikiPageWikiLink Daisyworld.
- Carbonate–silicate_cycle wikiPageWikiLink Diatom.
- Carbonate–silicate_cycle wikiPageWikiLink Foraminifera.
- Carbonate–silicate_cycle wikiPageWikiLink Gaia_hypothesis.
- Carbonate–silicate_cycle wikiPageWikiLink Global_temperature.
- Carbonate–silicate_cycle wikiPageWikiLink History_of_Earth.
- Carbonate–silicate_cycle wikiPageWikiLink Ice_age.
- Carbonate–silicate_cycle wikiPageWikiLink Lake_Nyos.
- Carbonate–silicate_cycle wikiPageWikiLink Lithosphere.
- Carbonate–silicate_cycle wikiPageWikiLink Magmatism.
- Carbonate–silicate_cycle wikiPageWikiLink Metamorphism.
- Carbonate–silicate_cycle wikiPageWikiLink Negative_feedback.
- Carbonate–silicate_cycle wikiPageWikiLink Opal.
- Carbonate–silicate_cycle wikiPageWikiLink Positive_feedback.
- Carbonate–silicate_cycle wikiPageWikiLink Radiolaria.
- Carbonate–silicate_cycle wikiPageWikiLink Remineralisation.
- Carbonate–silicate_cycle wikiPageWikiLink Runaway_greenhouse_effect.
- Carbonate–silicate_cycle wikiPageWikiLink Sediment.
- Carbonate–silicate_cycle wikiPageWikiLink Sedimentation.
- Carbonate–silicate_cycle wikiPageWikiLink Silicate.
- Carbonate–silicate_cycle wikiPageWikiLink Snowball_Earth.
- Carbonate–silicate_cycle wikiPageWikiLink Subduction.
- Carbonate–silicate_cycle wikiPageWikiLink Thermodynamic_equilibrium.
- Carbonate–silicate_cycle wikiPageWikiLink Venus.
- Carbonate–silicate_cycle wikiPageWikiLink Volcanism.
- Carbonate–silicate_cycle wikiPageWikiLink Water_vapor.
- Carbonate–silicate_cycle wikiPageWikiLink Weathering.
- Carbonate–silicate_cycle wikiPageWikiLinkText "Carbonate–silicate cycle".
- Carbonate–silicate_cycle wikiPageWikiLinkText "carbonate–silicate cycle".
- Carbonate–silicate_cycle wikiPageUsesTemplate Template:Geology-stub.
- Carbonate–silicate_cycle wikiPageUsesTemplate Template:Reflist.
- Carbonate–silicate_cycle subject Category:Climate_forcing_agents.
- Carbonate–silicate_cycle subject Category:Climate_history.
- Carbonate–silicate_cycle subject Category:Geochemistry.
- Carbonate–silicate_cycle type Redirect.
- Carbonate–silicate_cycle type Subfield.
- Carbonate–silicate_cycle comment "The carbonate–silicate geochemical cycle describes the transformation of silicate rocks to carbonate rocks by weathering and sedimentation at Earth's surface and the transformation of carbonate rocks back into silicates by metamorphism and magmatism.".
- Carbonate–silicate_cycle label "Carbonate–silicate cycle".
- Carbonate–silicate_cycle sameAs Q209890.
- Carbonate–silicate_cycle sameAs Carbonat-Silicat-Zyklus.
- Carbonate–silicate_cycle sameAs Karbonat-silikat-ciklo.
- Carbonate–silicate_cycle sameAs Carbonaat-silicaat-cyclus.
- Carbonate–silicate_cycle sameAs Cykl_węglanowo-krzemianowy.
- Carbonate–silicate_cycle sameAs m.05b35jd.
- Carbonate–silicate_cycle sameAs Q209890.
- Carbonate–silicate_cycle wasDerivedFrom Carbonate–silicate_cycle?oldid=703392704.
- Carbonate–silicate_cycle isPrimaryTopicOf Carbonate–silicate_cycle.