Vitrinite reflectance data for the Paleocene Fort Union and Eocene Wind River formations, and burial history of a drill hole located in central Wind River basin, Wyoming

1994 ◽  
Author(s):  
V.F. Nuccio
Keyword(s):  
River Basin ◽  
Vitrinite Reflectance ◽  
Drill Hole ◽  
Burial History ◽  
Wind River Basin ◽  
History Of ◽  
Reflectance Data

Vitrinite Reflectance Data for the Wind River Basin, Central Wyoming

2006 ◽  
Author(s):  
Thomas M. Finn ◽  
Laura N.R. Roberts ◽  
Mark J. Pawlewicz
Keyword(s):  
River Basin ◽  
Vitrinite Reflectance ◽  
Wind River Basin ◽  
Reflectance Data

The Variscan thermal history of west Clare, Ireland

1994 ◽  
Vol 131 (4) ◽  
pp. 545-558 ◽  
Author(s):  
E. Fitzgerald ◽  
M. Feely ◽  
J. D. Johnston ◽  
G. Clayton ◽  
L. J. Fitzgerald ◽  
...  
Keyword(s):  
Fluid Inclusion ◽  
Vitrinite Reflectance ◽  
Sedimentary Basins ◽  
Fluid Migration ◽  
Burial History ◽  
Vertical Movements ◽  
Quartz Veins ◽  
History Of ◽  
Exploration Well ◽  
Reflectance Data

AbstractVitrinite reflectance data from Namurian rocks in west Clare suggest that high maturation levels, corresponding to palaeotemperatures of 340–370 °C, were attained prior to Variscan deformation. Fluid inclusions in syntectonic quartz veins homogenize between 330 °C and 50 °C with an accompanying decrease in salinity from 27 to 5 eq. wt % NaCl. Maximum fluid inclusion entrapment temperatures ranged from more than 300 °C to 250 °C during Variscan folding in County Clare. The observed maturation levels (c. 7.5% Rmax) far exceed values for simple burial maturation based on the estimated burial history and ‘normal’ geothermal gradients, and do not increase with depth in the Doonbeg No. 1 exploration well. Fluid advective heating is suggested as the most likely mechanism consistent with the Clare reflectance and thermometric data. Vein and shear zone dimensions preclude rapid vertical movements of hot fluids through the section, and extensive lateral fluid migration from sedimentary basins undergoing tectonically driven dewatering to the south or west is therefore proposed.

Sign in / Sign up

Export Citation Format

Share Document