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Development of active low-angle normal fault systems during orogenic collapse; insight from Tibet

Paul Kapp, Michael Taylor, Daniel Stockli and Ding Lin
Development of active low-angle normal fault systems during orogenic collapse; insight from Tibet
Geology (Boulder) (January 2008) 36 (1): 7-10

Abstract

Active north-trending rifts in Tibet vary significantly in their character as a function of extension magnitude. Most rifts are characterized by internally drained basins bounded by high-angle normal faults with Paleogene or older rocks in the footwall. However, the central part of the Yadong-Gulu Rift (near Lhasa) and the newly documented Lunggar Rift in west-central Tibet are bounded by low-angle normal faults (detachments) with mylonitic rocks and Miocene granites in the footwall, and exhibit active basin incision and intrabasin topographic highs in areas of inferred maximum extension. We suggest that Tibetan rifts initiate as high-angle normal fault and half-graben or graben basin systems and evolve in response to increasing extension and footwall isostatic rebound into detachment systems that are active at uppermost crustal levels and above which rift basin fill is being uplifted and eroded.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 36
Serial Issue: 1
Title: Development of active low-angle normal fault systems during orogenic collapse; insight from Tibet
Affiliation: University of Arizona, Department of Geosciences, Tucson, AZ, United States
Pages: 7-10
Published: 200801
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 29
Accession Number: 2008-028887
Categories: Structural geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: With GSA Data Repository Item 2008006
Illustration Description: illus. incl. sects., geol. sketch map
N31°25'00" - N31°49'60", E83°25'00" - E83°45'00"
Secondary Affiliation: University of Kansas, USA, United StatesChinese Academy of Sciences, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 200809
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