The relationship between fracturing, asymmetric folding, and normal faulting in Lisburne Group carbonates : West Porcupine Lake Valley, Northeastern Brooks Range, Alaska
Title:
The relationship between fracturing, asymmetric folding, and normal faulting in Lisburne Group carbonates : West Porcupine Lake Valley, Northeastern Brooks Range, Alaska
JLCTITLE245:
by John Ryan Shackleton.
Personal Author:
Publication Information:
[2003].
Physical Description:
xv, 189 leaves : ill., maps ; 28 cm. + 1 CD-ROM.
General Note:
"May 2003."
Three folded maps in pocket.
Dissertaton Note:
Thesis (M.S.)--University of Alaska, Fairbanks, 2003.
Abstract:
"The distribution of fold related fractures and other mesoscopic structures in asymmetrically folded Mississippian to Pennsylvanian Lisburne Group carbonates gives clues concerning the mechanism of folding. Since fracture sets pre-date and post-date folding, it is important, but sometimes difficult, to determine which fracture sets are related to folding. Higher density of fold related fractures and dissolution cleavage in the hinges than limbs of two folds in the study area is evidence for fixed hinge detachment folding. However, geometric modeling of box shaped folds in the study area suggests that some folds may have formed by either detachment folding or trishear fault propagation folding. Formulaic modeling of fracture density in a stratigraphic section using stratigraphic attributes such as lithology, bed thickness, and chert content predicts general trends in fracture density, but other factors such as slip along bed contacts may obscure the relationship between fracture density, lithology and bed thickness"--Leaf iii.
Bibliography Note:
Includes bibliographical references (leaves 185-189).
Corporate Subject:
Added Corporate Author:
Additional Physical Form Available:
Online version available via The University of Alaska Fairbanks http://hdl.handle.net/11122/14933
Contents:
1. Introduction -- 2. Geologic setting -- 3. Background information on fractures and folds -- 4. Methodology -- 5. General geology of the study area -- 6. The relationship between mechanical stratigraphy and fracture density and character -- 7. Fracturing and folding in the northern fold train -- 8. Evaluation of application fold models using fracture data and field documentation of fold geometry -- 9. Conclusions -- References.