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A magnetotelluric investigation of the San Andreas Fault at Carrizo Plain, California
Author(s) -
Mackie Randall L.,
Livelybrooks Dean W.,
Madden Theodore R.,
Larsen Jimmy C.
Publication year - 1997
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/97gl01604
Subject(s) - magnetotellurics , geology , san andreas fault , seismology , fault (geology) , drilling , metamorphic rock , paleontology , electrical resistivity and conductivity , mechanical engineering , electrical engineering , engineering
High quality, wide‐band magnetotelluric data were collected along two profiles crossing the San Andreas fault at Carrizo Plain, California for crustal imaging as part of the San Andreas Deep Drilling Project. Two‐dimensional inversions of the data indicate that the upper crustal part of the San Andreas fault does not appear here as an anomalously conductive zone. Additionally, a broad resistive zone under the Temblor Mountains (east of the fault) suggests resistive crystalline or metamorphic rocks may be present here as opposed to the more conducting Franciscan assemblage, contradicting the generally‐accepted geologic model.