Precipitation rates for quartz cement in sandstones determined by fluid-inclusion microthermometry and temperature-history modeling

Journal Article · Fri Apr 01 00:00:00 EST 1994 · Journal of Sedimentary Research - Section A; (United States)

DOI:https://doi.org/10.2110/jsr.64.324· OSTI ID:7233621

Walderhaug, O ^[1]

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1. Rogaland Research, Stavanger (Norway)

Precipitation rates for quartz cement in quartz-rich Jurassic sandstones from the Norwegian shelf have been determined by combining petrographic data, fluid-inclusion data, and temperature-history modeling. Thin-section petrography enables the number of moles of quartz cement precipitated in a sample and the surface area available for precipitation to be determined. Measurement of homogenization temperatures for fluid inclusions located at the boundaries between quartz clasts and quartz overgrowths permits the temperature of initial quartz cementation to be found, and this temperature may be translated to date by constructing a temperature-history curve for each sandstone. Since quartz cementation has continued up to the present in the studied sandstones, precipitation rates for quartz cement per unit time and surface area can be calculated. The calculated precipitation rates enable an equation giving quartz precipitation rate as a function of temperature to be defined. Quartz cementation, and consequently also porosity evolution, in deeply buried quartz-rich sandstones can therefore be predicted quantitatively.

• OSTI ID: 7233621
• Journal Information: Journal of Sedimentary Research - Section A; (United States), Vol. A64:2
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
GEOLOGIC DEPOSITS
DIAGENESIS
GEOTHERMOMETRY
PETROGRAPHY
NORWAY
QUARTZ
PRECIPITATION
SANDSTONES
CONTINENTAL SHELF
NORTH SEA
ATLANTIC OCEAN
CONTINENTAL MARGIN
DEVELOPED COUNTRIES
EUROPE
GEOLOGY
MINERALS
OXIDE MINERALS
ROCKS
SCANDINAVIA
SEAS
SEDIMENTARY ROCKS
SEPARATION PROCESSES
SURFACE WATERS
WESTERN EUROPE
580000* - Geosciences