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.
Suggested Citation
Schultz, R.A., Okubo, C., and Fossen, H., 2010, Porosity and grain size controls on compaction band formation in Jurassic Navajo Sandstone: Geophysical Research Letters, v. 37, no. L22306, 5 p., https://doi.org/10.1029/2010GL044909.
| 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 |
| Publication Date | November 20, 2010 |
| 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 |