Micro-scale damage characterized within part of a dismembered positive flower structure, San Jacinto fault, southern California, USA

Autor:	Addison K. Richter, Daniel W. Peppard, Keith W. Kastama, Dan Puckett, Kristen N. Dennis, Emma J. Vierra, Mark A. Korte-Nahabedian, Gary H. Girty, Chelsea M. Blanton, Heather N. Webb, Thomas K. Rockwell, Ariella I. Goldstein, Jack F. Brown
Rok vydání:	2018
Předmět:	geography geography.geographical_feature_category Cataclasite 010504 meteorology & atmospheric sciences Pleistocene Geochemistry Geology Fault (geology) 010502 geochemistry & geophysics 01 natural sciences Cretaceous Sedimentary rock 0105 earth and related environmental sciences Gneiss
Zdroj:	Journal of Structural Geology. 112:53-68
ISSN:	0191-8141
DOI:	10.1016/j.jsg.2018.04.014
Popis:	To better understand the processes that control sub-grain fracturing in fault damage zones, we studied micro-scale damage in sandstones adjacent to the San Jacinto fault (SJF) where it is exhumed from a total depth of ∼220 m beneath a northeast-verging thrust that comprises part of a relic and dismembered flower structure. The thrust places high grade gneiss of the pre-middle Cretaceous Burnt Valley complex over sedimentary rocks of the Pleistocene Bautista Formation. An ∼10–12 cm thick zone of cataclasite is present along the northeast side of the fault adjacent to a narrow black ultracataclasite core. Non-pervasive microscopic damage, characterized by pulverized sand grains, extends outward from the zone of cataclasites tens of meters. Such textures are better developed in sandstones that contain
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6793227951319dbcc752f64e416a6093 https://doi.org/10.1016/j.jsg.2018.04.014 Zobrazit plný text záznamu Full Text from ScienceDirect