Exhuming the Remains of the Inactive Mountain-Front Pirate Fault, Santa Catalina Mountains, Southeastern Arizona

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Author
Hoxie, D.T.
Issue Date
2012-11-26
Keywords
Arizona Geological Survey Contributed Reports
Proterozoic
Miocene
Early Pliocene
Tertiary
Basin and Range Province
Tucson
Oro Valley
Pusch Ridge
Cañada del Oro

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Citation
Hoxie, D.T., Exhuming the Remains of the Inactive Mountain-Front Pirate Fault, Santa Catalina Mountains, Southeastern Arizona. Arizona Geological Survey Contributed Report CR-12-F, 18 p.
Description
The ~25 km accessible trace of the north-south trending, west-side down, normal, mountain-front Pirate fault has been mapped to locate and describe those erosionally exhumed remnants of the fault that together provide a basis for structural reconstruction of this nominally Basin-Range tectonic feature. The fault forms the western boundary of the Santa Catalina Mountains in southeastern Arizona, where it separates the uplifted Santa Catalina structural block on the east from the down-dropped, alluvial Cañada del Oro basin on the west. Vertical displacement on the fault is estimated to be ~4 km, accumulated over a ~6 my active duration from ~12 to ~6 Ma. Following cessation of active uplift, the fault was buried under detritus eroded from the uplifted Santa Catalina block and, currently, is being exhumed by the downcutting Cañada del Oro and its tributaries. This field examination reveals the fault to have left a sparse but diverse collection of remains implying a varied history of fault development and evolution.
URI
http://hdl.handle.net/10150/628798
Additional Links
https://library.azgs.arizona.edu/item/AGCR-1552427672866-378
Language
en
Series/Report no.
CR-12-F
Rights
Arizona Geological Survey. All rights reserved.
Collection Information
Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
North Bounding Coordinate
32.5819
South Bounding Coordinate
32.3456
West Bounding Coordinate
-110.981
East Bounding Coordinate
-110.778
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