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Aragonite and the Genesis of Carbonates in Mahogany Zone Oil Shales of Colorado's Green River Formation.

Authors
Smith-JW; Robb-WA
Source
NTIS: PB 227 187 :21 pages
Link
NIOSHTIC No.
10008977
Abstract
Aragonite, co-occurring with calcite and dolomite as matrix minerals, has been discovered in mahogany zone oil shales of Colorado's Eocene Green River Formation, posing puzzles on the geochemical patterns of their separate origins, reasons for their simultaneous existence, and their interrelation. The presence of aragonite is demonstrated by x-ray diffraction. Amounts of aragonite and dolomite are significantly and inversely related, but the calcite quantity is essentially independent of either aragonite or dolomite quantity. A geochemical pattern outlining the deposition conditions that created the Green River Formation oil shale is postulated from characteristics of the oil shale. The development of the three separate carbonates--aragonite, calcite, and dolomite--the inverse relationship between aragonite and dolomite, and the independence of amounts of calcite and the other two carbonates are shown to be natural consequences of this oil- shale genesis pattern.
Publication Date
19730101
Document Type
IH; Report of Investigation;
Fiscal Year
1973
NTIS Accession No.
PB-227187
NTIS Price
A03
Identifying No.
RI 7727
NIOSH Division
LERC;
Source Name
NTIS: PB 227 187
State
CO;
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