Dolomites formed under conditions of deep burial: Hunton Group carbonate rocks (Upper Ordovician to Lower Devonian) in the deep Anadarko Basin of Oklahoma and Texas

1986 ◽  
Vol 1 (1) ◽  
pp. 61-73 ◽  
Author(s):  
Charles A. Sternbach ◽  
Gerald M. Friedman
Keyword(s):  
Carbonate Rocks ◽  
Lower Devonian ◽  
Upper Ordovician ◽  
Anadarko Basin ◽  
Deep Burial

scholarly journals Chrono-, litho- and conodont bio-stratigraphy of the Rauchkofel Boden Section (Upper Ordovician – Lower Devonian), Carnic Alps, Austria

2017 ◽  
Vol 50 (4) ◽  
pp. 445-469 ◽  
Author(s):  
Hans Peter Schönlaub ◽  
Carlo Corradini ◽  
Maria G. Corriga ◽  
Annalisa Ferretti
Keyword(s):  
Lower Devonian ◽  
Upper Ordovician ◽  
Carnic Alps

scholarly journals Experimental simulation of chemomechanical processes during deep burial diagenesis of carbonate rocks

2014 ◽  
Vol 119 (2) ◽  
pp. 984-1007 ◽  
Author(s):  
L. Neveux ◽  
D. Grgic ◽  
C. Carpentier ◽  
J. Pironon ◽  
L. Truche ◽  
...  
Keyword(s):  
Carbonate Rocks ◽  
Experimental Simulation ◽  
Burial Diagenesis ◽  
Deep Burial

Authigenic albite in carbonate rocks - a tracer for deep-burial brine migration?

Sedimentology ◽  
1999 ◽  
Vol 46 (4) ◽  
pp. 649-666 ◽  
Author(s):  
Christoph Spotl ◽  
Fred J. Longstaffe ◽  
Karl Ramseyer ◽  
Bernd Rudinger
Keyword(s):  
Carbonate Rocks ◽  
Deep Burial ◽  
Brine Migration

Isotope geochemistry of dissolved, precipitated, airborne, and fallout sulfur species associated with springs near Paige Mountain, Norman Range, N.W.T.

1982 ◽  
Vol 19 (7) ◽  
pp. 1395-1407 ◽  
Author(s):  
Robert O. van Everdingen ◽  
M. Asif Shakur ◽  
H. Roy Krouse
Keyword(s):  
Sulfate Reduction ◽  
Water Vapour ◽  
Carbonate Rocks ◽  
Isotope Fractionation ◽  
Lower Devonian ◽  
Isotope Geochemistry ◽  
Spring Water ◽  
Sulfate Radical ◽  
Sulfur Species ◽  
Rock Formation

δ34S values determined for dissolved sulfate in water discharged by sulfurous springs near Paige Mountain identify gypsum beds in the Lower Devonian Bear Rock Formation as the sulfate source, whereas relatively low δ18O values show that as much as 30% of the sulfate may have gone through a reduction–re-oxidation cycle. Reduced sulfur species in the spring water have negative δ34S values as a result of microbiological isotope fractionation during sulfate reduction; airborne sulfur species (H2S, SO2, H2SO4) and gypsum formed through reaction of H2SO4 fallout with exposed carbonate rocks show similar negative δ34S values. Negative δ18O values for the sulfate radical in H2SO4 fallout and in the alteration product indicate that more than half of the oxygen reacting with airborne H2S is derived from water vapour.

Chronometric calibration of mid-Ordovician to Tournaisian conodont zones: a compilation from recent graphic-correlation and isotope studies

1992 ◽  
Vol 129 (6) ◽  
pp. 709-721 ◽  
Author(s):  
Barry G. Fordham
Keyword(s):  
High Resolution ◽  
High Precision ◽  
Time Scale ◽  
Lower Devonian ◽  
New South ◽  
Upper Ordovician ◽  
South Wales ◽  
Isotope Studies ◽  
Stratotype Section ◽  
Upper Silurian

AbstractThree available graphic-correlation analyses are used to calibrate mid-Palaeozoic conodont zonations: Sweet's scheme for the mid- to Upper Ordovician; Kleffner's for the mid- to Upper Silurian; and Murphy & Berry's for the lower and middle Lower Devonian. The scheme of Sweet is scaled by applying the high-precision U-Pb zircon date of Tucker and others for the Rocklandian and linked with that of Kleffner by scaling the graptolite sequence of the Ordovician-Silurian global stratotype section to fit two similarly derived dates from this sequence. The top of Kleffner's scheme, all of Murphy & Berry's, as well as standard zones to the Frasnian are calibrated by using tie-points of the latest Cambridge-BP time-scale (GTS 89). However, the recent microbeam zircon date by Claoué-Long and others for the Hasselbachtal Devonian-Carboniferous auxiliary stratotype is used to calibrate the standard Famennian zones. Also the similarly derived but preliminary determination reported by Roberts and others from the Isismurra Formation of New South Wales is tentatively taken as the top of the Tournaisian and so used to calibrate Tournaisian zones. Despite the considerable extrapolation required to compile these schemes and their inherent errors, the resultant time-scale closely agrees with other dates of Tucker and others from the Llanvirn as well as the GTS 89 Homerian-Gorstian tie-point. This suggests that stratigraphic methods can be usefully applied to geochronometry. The Llandovery appears to have lasted longer (16 m. y.) than usually envisaged and the Ordovician-Silurian boundary may need to be lowered to approximately 443.5 Ma. Certainly, chrons varied widely in duration and further stratigraphic studies to estimate their relative durations as well as high-resolution dating for their calibration will be crucial to more accurate biochronometries.

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