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Pedogenic

Sur cia.1 Deposits. Uraniferous surficial deposits maybe broadly defined as uraniferous sediments, usually of Tertiary to recent age which have not been subjected to deep burial and may or may not have been calcified to some degree. The uranium deposits associated with calcrete, which occur in Australia, Namibia, and Somaha in semiarid areas where water movement is chiefly subterranean, are included in this type. Additional environments for uranium deposition include peat and bog, karst caverns, as well as pedogenic and stmctural fills (15). [Pg.185]

Ludwig KR, Paces JB (2002) Uranitrm-series dating of pedogenic silica and carbonate. Crater Flat, Nevada. Geochim Cosmochim Acta 66 487-506... [Pg.457]

Quade J, Ceding TE, Bowman JR (1989) Systematic variations in the carbon and oxygen isotopic composition of pedogenic carbonate along elevation transects in the southern Great Basin. United States Geol Soc Am Bull 101 464-475... [Pg.458]

Ku T-L, Bull WE, Frieman ST, Knauss KG (1979) °Th/ " U dating of pedogenic carbonates in gravelly desert soils of Vidal Valley, Southeastern California. Geol Soc Am Bull 90 1063-1073 Ku TH, Krauss KG, Mathieu GG (1977) Uranium in open ocean concentration and isotopic composition. Deep Sea Res 24 1005-1017... [Pg.572]

Frink, D. S. (1995), Application of the oxidizable carbon ratio (OCR) dating procedure and its implications for pedogenic research, in Pedological Perspectives in Archaeological Research, Soil Science Society Special Publication, Vol. 44, Soil Science Society of America, Madison, WI. [Pg.576]

Schwertmann U (1985) The effect of pedogenic environments on iron oxide minerals. Adv Soil Sci 1 171-200... [Pg.36]

The total calculated C02 sink of 0.30 Pg C/a is very close to that of Gombert (2002 0.302 Pg C/a), who used a different approach. Although our method seems valid, in terranes with large amounts of pedogenic carbonate (48% continental... [Pg.478]

Important, poorly-constrained variables in this carbon balance include temporal and spatial variations in precipitation and RO DIC, carbonate dust, and pedogenic carbonate and soil C02. In addition, ocean and lake response to river carbon input is not well known. Although marine and freshwater aquatic organisms can be fertilized by increases in N, P, Si, Fe, Zn and C02 (Cassar et al. 2004 Zondervan 2007), it is not clear how much of the... [Pg.479]

Substrate types and the pedogenic processes they prompt can influence the results in partial leach experiments. [Pg.42]

Gold in pedogenic carbonate revealed Meivyn J. Lintern Chris G. Ryan Robert M. Hough ... [Pg.71]

Data has been obtained from published sources and listed data held in the library of the Geological Survey of Namibia. This data has been used to assess the geochemical environment in the vicinity of channel fill and pedogenic uraniumbearing calcrete deposits. The data has been analysed by various methods and laboratories so direct comparison of the data has to be treated with caution. A summary table of the geochemistry of waters from each of the deposits is given in Table 1. [Pg.426]

Quasi A, Hoefs J, Paul J (2006) Pedogenic carbonates as a proxy for palaeo-C02 in the Paleozoic atmosphere. Palaeogeogr Palaeochmatol Palaeoecol 242 110-125 Quay PD, TUbrook B, Wong CS (1992) Oceanic uptake of fossil fuel CO2 carbon-13 evidence. Science 256 74-79... [Pg.264]

Stein LY, Yung YL (2003) Production, isotopic composition, and atmospheric fate of biologically produced nitrous oxide. Ann Rev Earth Planet Sci 31 329-356 Stem LA, Chamberlain CP, Reynolds RC, Johnson CD (1997) Oxygen isotope evidence of climate change from pedogenic clay minerals in the Himalayan molasse. Geochim Cosmochim Acta 61 731-744... [Pg.272]

Terrestrial- pedogenic supergene massive vesicular pisolithic Gt, Hm, Fh soils Laterite Bog iron Ferricrete... [Pg.416]

Almost all rocks contain at least some iron. The more important minerals, in which Fe is a major constituent, are given with their Fe contents in Table 16.1. In all of these minerals except magnetite, iron is exclusively or predominantly in the bivalent state. During weathering, the iron is released from these minerals and secondary , pedogenic iron minerals are formed. The most important ones are Fe-contain-ing clay silicates and Fe oxides but under reducing conditions, Fe carbonates, sulphides and phosphates may also be formed. [Pg.433]

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See also in sourсe #XX -- [ Pg.178 ]



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Calcrete pedogenic

Carbonate cements pedogenic

Carbonates, pedogenic

Gold in pedogenic carbonate revealed

Iron pedogenic

Pedogenic horizons

Pedogenic horizons surface horizon

Pedogenic processes

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