A geochemical clogging model with carbonate precipitation rates under hydrothermal conditions
نویسندگان
چکیده
منابع مشابه
Seeking a geochemical identifier for authigenic carbonate.
Authigenic carbonate was recently invoked as a third major global carbon sink in addition to primary marine carbonate and organic carbon. Distinguishing the two carbonate sinks is fundamental to our understanding of Earth's carbon cycle and its role in regulating the evolution of atmospheric oxygen. Here, using microscale geochemical measurements of carbonates in Early Triassic strata, we show ...
متن کاملSpeciation of Molybdates under Hydrothermal Conditions
In situ Raman spectroscopy was applied to investigate the speciation of molybdates under hydrothermal conditions in 0.2 M aqueous solution in the temperature range between 20°C and 200°C and at pH values between 7 and 1. The nature and abundance of molecular and supra-molecular species differs significantly compared to the distribution of species under ambient conditions at the same pH. Whereas...
متن کاملOrganic Geochemical Biosignatures in Alkaline Hydrothermal Ecosystems
The 13C content of microbial products are controlled by many factors, including the 13C content of the growth substrate, growth rate, the flux of carbon through various parts of the biochemical network, and the isotopic fractionation imposed by the enzymes of that network. We analyzed the 13C content of products of the methanogen Methanosarcina barkeri and found that fractionation varied strong...
متن کاملExperimental investigation of single carbon compounds under hydrothermal conditions
The speciation of carbon in subseafloor hydrothermal systems has direct implications for the maintenance of life in present-day vent ecosystems and possibly the origin of life on early Earth. Carbon monoxide is of particular interest because it represents a key reactant during the abiotic synthesis of reduced carbon compounds via Fischer–Tropsch-type processes. Laboratory experiments were condu...
متن کاملHomometallic UO2(2+) diphosphonates assembled under ambient and hydrothermal conditions.
Four uranyl methylenediphosphonates have been synthesized from reactions of uranyl nitrate and methylenediphosphonate in water. Three of the compounds, (1) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 2 H(2)O, (2) (UO(2))[CH(2)(PO(3)H)(2)](H(2)O) x 4 H(2)O, and (3) (UO(2))[O(3)PCH(2)PO(3)H](H(2)O) x 3 H(2)O x NH(4), have been synthesized under ambient conditions whereas compound 4, (UO(2))[CH(2)(PO(3)H)(...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Applied Geochemistry
سال: 2013
ISSN: 0883-2927
DOI: 10.1016/j.apgeochem.2012.07.018