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GEOREF RECORD

Meteoric modification of early dolomite and late dolomitization by basinal fluids, upper Arbuckle Group, Slick Hills, southwestern Oklahoma

Gao Guoqiu, Lynton S. Land and Robert L. Folk
Meteoric modification of early dolomite and late dolomitization by basinal fluids, upper Arbuckle Group, Slick Hills, southwestern Oklahoma
AAPG Bulletin (November 1992) 76 (11): 1649-1664

Abstract

Dolomites > 10 m thick consist of early dolomite surrounded by several metres of late dolomite. Late dolomite is a transition zone between early dolomite to limestone. Early dolomite is non- luminescent to dully luminescent, has Fe < 0.1 mole%, Mn < 0.01%, deltaU18O -4 to -8 (PDB) and (super 87) Sr/ (super 86) Sr 0.7085-0.7090 (similar to early Ordovician sea-water). Sr ratios like Ordovician sea-water suggests that early dolomite is syndepositional, but the low delta (super 18) O values suggest it was modified by Ordovician meteoric water. Late dolomite is brightly luminescent, has Fe 0.1- 0.8%, Mn 0.05-0.5%, delta (super 18) O +6 to -2 and (super 87) Sr/ (super 86) Sr 0.7088-0.7099 (mostly higher than early Ordovician sea- water). These values suggest formation from later fluids, perhaps from the adjacent Anadarko basin later in the Palaeozoic.


ISSN: 0149-1423
EISSN: 1558-9153
Coden: AABUD2
Serial Title: AAPG Bulletin
Serial Volume: 76
Serial Issue: 11
Title: Meteoric modification of early dolomite and late dolomitization by basinal fluids, upper Arbuckle Group, Slick Hills, southwestern Oklahoma
Affiliation: Central-South University of Technology, Department of Geology, Changsha, China
Pages: 1649-1664
Published: 199211
Text Language: English
Publisher: American Association of Petroleum Geologists, Tulsa, OK, United States
References: 56
Accession Number: 1992-059662
Categories: Sedimentary petrologyIsotope geochemistry
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, sketch map
N33°34'60" - N37°00'00", W103°00'00" - W94°25'00"
Secondary Affiliation: University of Texas at Austin, USA, United States
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 1992
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