Completed Study |
Publication Hudec, M. R., and Jackson, M. P. A., 2002, Structural segmentation, inversion, and salt tectonics on a passive margin: evolution of the Inner Kwanza Basin, Angola: Geological Society of America Bulletin, v. 114, p. 1222-1244 |
Structural
Segmentation, Inversion, and Salt Tectonics on a Passive Margin: Tectonic
Evolution of the Inner Kwanza Basin, Angola
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Abstract Structural segmentation of the Inner Kwanza Basin played a central role in the evolution of salt structures. Adjacent to basement uplifts, diapirs were initiated as buckle folds. Some anticlines were unroofed by erosion and evolved into passive salt walls. In other areas, broad salt "megawalls" were triggered by either detached extension or basement-block uplift. These walls grew until they exhausted their supply of salt. Thereafter, dissolution rates exceeded rates of salt inflow, so the megawalls began to subside. Withdrawal of salt from the megawalls produced the elongate sedimentary troughs for which the basin is famous. Trough fill ranges in age from Cenomanian to Pliocene, and this age varies greatly from trough to trough and along strike in a single trough. |
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For more information, please contact Michael Hudec. Telephone 512-471-1428. E-mail michael.hudec@beg.utexas.edu. | |
March
2003
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