Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone
Geophysical Research Letters
By: Richard A. Schultz, Chris H. Okubo, and Haakon Fossen
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Abstract
Determining the rock properties that permit or impede the growth of compaction bands in sedimentary sequences is a critical problem of importance to studies of strain localization and characterization of subsurface geologic reservoirs. We determine the porosity and average grain size of a sequence of stratigraphic layers of Navajo Sandstone that are then used in a critical state model to infer plastic yield envelopes for the layers. Pure compaction bands are formed in layers having the largest average grain sizes (0.42–0.45 mm) and porosities (28%), and correspondingly the smallest values of critical pressure (-22 MPa) in the sequence. The results suggest that compaction bands formed in these layers after burial to -1.5 km depth in association with thrust faulting beneath the nearby East Kaibab monocline, and that hardening of the yield caps accompanied compactional deformation of the layers.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2010GL044909 |
| Volume | 37 |
| Issue | L22306 |
| Year Published | 2010 |
| Language | English |
| Publisher | American Geophysical Union |
| Publisher location | Washington, D.C. |
| Contributing office(s) | Astrogeology Science Center |
| Description | 5 p. |
| Country | United States |
| Other Geospatial | Colorado Plateau, East Kaibab monocline |
| Google Analytic Metrics | Metrics page |