Hydro-geochemical studies of uranium mill tailing piles at Riverton, Wyoming and Maybell, Colorado. Annual report for FY 1981

Narasimhan, T. N.; Galbraith, Robert M.; White, Art F.; Smith, Andy; Schmidt, Harold; Moed, B.A.; Tokunaga, Takahisa

doi:10.2172/5057050

Cited by 1 publication

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Present-day shallow groundwater ␦ 18 O values are Ϫ15 to Ϫ17‰ at Riverton, Wyoming, and Ϫ16.3‰ at Douglas, Wyoming (Narasimhan et al 1982;Lander 1991). However, the probable direction of any change in ␦ 18 O of formation water with depth can be constrained by examination of modern soil carbonates.…”

Section: Time Of Formationmentioning

confidence: 98%

Hematite and Calcite Coatings on Fossil Vertebrates

Bao¹

1998

SEPM JSR

View full text Add to dashboard Cite

Hematite coatings are common on vertebrate fossils from Paleocene/Eocene paleosol deposits in the Bighorn Basin, Wyoming. In general, hematite coatings are found only on fossils and are limited to soils exhibiting hydromorphic features and moderate maturity. Petrographic and isotopic evidence suggests that hematite and micritic calcite formed at nearly the same time in a pedogenic environment, whereas sparry calcite formed later at greater burial depths. The parent material of paleosols is rich in iron, supplying an ample source of iron for hematite formation. Decomposition of animal tissues around bones may enhance the weathering of iron-bearing minerals in soils surrounding carcasses, while the bones might provide favorable sites for iron accumulation. The predominance of discrete smectite, together with regional geothermal history, suggests that burial temperatures have not exceeded 70؇C. Hematite coatings on fossils can serve as a substrate for geochemical analysis in continental paleoclimatic research, owing to their pedogenic origin, abundance, and resistance to diagenetic alteration.

show abstract

Section: Time Of Formationmentioning

confidence: 98%

Hematite and Calcite Coatings on Fossil Vertebrates

Bao¹

1998

SEPM JSR

View full text Add to dashboard Cite

show abstract

Hydro-geochemical studies of uranium mill tailing piles at Riverton, Wyoming and Maybell, Colorado. Annual report for FY 1981

Cited by 1 publication

References 2 publications

Hematite and Calcite Coatings on Fossil Vertebrates

Hematite and Calcite Coatings on Fossil Vertebrates

Contact Info

Product

Resources

About