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Article: Active surface salt structures of the western Kuqa fold-thrust belt, northwestern China

TitleActive surface salt structures of the western Kuqa fold-thrust belt, northwestern China
Authors
Issue Date2014
Citation
Geosphere, 2014, v. 10, n. 6, p. 1219-1234 How to Cite?
Abstract© 2014 Geological Society of America. The western Kuqa fold-thrust belt of Xinjiang Province, China, hosts a series of surface salt structures. Here we present preliminary analysis of the geometry, kinematics, and surface processes of three of these structures: the Quele open-toed salt thrust sheet, Tuzimazha salt wall, and Awate salt fountain. The first two are line-sourced, the third appears to be point-sourced, and all are active. The ~35-km-long, 200-m-thick Quele open-toed salt thrust sheet features internal folding, salt-lined transfer structures, dissolution topography, flanking growth strata, and alluvial fan/stream-network interactions. The ~10-km-long, 50-m-wide Tuzimazha salt wall marks a local topographic high, such that fluvial stream networks are deflected by the rising weak tabular salt body. The salt wall is also flanked by growth strata and normal faults. The ~2-km-long Awate salt fountain represents salt exhumation coincident with the intersection of multiple structures and a river. Therefore this salt body may respond to local structural and/or erosional variations, or it may play a key role determining such variations-or both. Activity along all three structures confirms that active deformation occurs from foreland to hinterland across the western Kuqa fold-thrust belt. Gradual lateral transition from bedded strata to flow-banded halite observed within the Quele open-toed salt thrust sheet implies that similar transitions observed in seismic reflection data do not require interpretation as diapiric cut-offrelationships. The surface salt structures of the western Kuqa fold-thrust belt display a variety of erosiontectonics interactions, with nuances reflecting the low viscosity and high erodibility of salt, including stream deflections, potential tectonic aneurysm development, and even an upper-crustal test site for channel flow-focused denudation models.
Persistent Identifierhttp://hdl.handle.net/10722/224064

 

DC FieldValueLanguage
dc.contributor.authorLi, Jianghai-
dc.contributor.authorWebb, A. Alexander G-
dc.contributor.authorMao, Xiang-
dc.contributor.authorEckhoff, Ingrid-
dc.contributor.authorColón, Cindy-
dc.contributor.authorZhang, Kexin-
dc.contributor.authorWang, Honghao-
dc.contributor.authorLi, An-
dc.contributor.authorHe, Dian-
dc.date.accessioned2016-03-18T06:21:16Z-
dc.date.available2016-03-18T06:21:16Z-
dc.date.issued2014-
dc.identifier.citationGeosphere, 2014, v. 10, n. 6, p. 1219-1234-
dc.identifier.urihttp://hdl.handle.net/10722/224064-
dc.description.abstract© 2014 Geological Society of America. The western Kuqa fold-thrust belt of Xinjiang Province, China, hosts a series of surface salt structures. Here we present preliminary analysis of the geometry, kinematics, and surface processes of three of these structures: the Quele open-toed salt thrust sheet, Tuzimazha salt wall, and Awate salt fountain. The first two are line-sourced, the third appears to be point-sourced, and all are active. The ~35-km-long, 200-m-thick Quele open-toed salt thrust sheet features internal folding, salt-lined transfer structures, dissolution topography, flanking growth strata, and alluvial fan/stream-network interactions. The ~10-km-long, 50-m-wide Tuzimazha salt wall marks a local topographic high, such that fluvial stream networks are deflected by the rising weak tabular salt body. The salt wall is also flanked by growth strata and normal faults. The ~2-km-long Awate salt fountain represents salt exhumation coincident with the intersection of multiple structures and a river. Therefore this salt body may respond to local structural and/or erosional variations, or it may play a key role determining such variations-or both. Activity along all three structures confirms that active deformation occurs from foreland to hinterland across the western Kuqa fold-thrust belt. Gradual lateral transition from bedded strata to flow-banded halite observed within the Quele open-toed salt thrust sheet implies that similar transitions observed in seismic reflection data do not require interpretation as diapiric cut-offrelationships. The surface salt structures of the western Kuqa fold-thrust belt display a variety of erosiontectonics interactions, with nuances reflecting the low viscosity and high erodibility of salt, including stream deflections, potential tectonic aneurysm development, and even an upper-crustal test site for channel flow-focused denudation models.-
dc.languageeng-
dc.relation.ispartofGeosphere-
dc.titleActive surface salt structures of the western Kuqa fold-thrust belt, northwestern China-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1130/GES01021.1-
dc.identifier.scopuseid_2-s2.0-84920150992-
dc.identifier.volume10-
dc.identifier.issue6-
dc.identifier.spage1219-
dc.identifier.epage1234-
dc.identifier.eissn1553-040X-

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