Arid
DOI10.1130/B31142.1
Detrital zircon geochronology of Neoproterozoic-Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave-Snow Lake fault hypothesis
Chapman, Alan D.1,2; Ernst, W. G.1; Gottlieb, Eric1; Powerman, Vladislav1,3; Metzger, Ellen P.4
通讯作者Chapman, Alan D.
来源期刊GEOLOGICAL SOCIETY OF AMERICA BULLETIN
ISSN0016-7606
EISSN1943-2674
出版年2015
卷号127期号:7-8页码:926-944
英文摘要

Correlation of lithotectonic packages across major transcurrent structures is critical to understanding the tectonic evolution of the North American continental margin. Detrital zircon geochronology of uppermost Proterozoic to Lower Paleozoic miogeoclinal strata from the White-Inyo Mountains permits evaluation of: (1) the age and provenance of these metasediments and (2) a model for truncation of the passive margin along a postulated large-magnitude Cretaceous dextral shear zone, i.e., the Mojave-Snow Lake fault. U-Pb ages of detrital zircons from the Neoproterozoic Wyman Formation, the upper-most Proterozoic Reed Dolomite (Hines Tongue Member), and clastic strata of the Lower Cambrian Deep Springs, Campito (Montenegro Member), Poleta, and Harkless formations reflect ultimate derivation from the adjacent 1.7-pre-1.8 Ga Mojavia terrane and/or 1.7-1.8 Ga Yavapai continental basement, with subsidiary sources in both the ca. 1.4 Ga Yavapai-Mazatzal anorogenic granitoids and the >2.5 Ga North American craton, and a small proportion of 1.0-1.3 Ga grains, most likely reworked from Grenville clastic wedge deposits. Detrital zircon age spectra from the Lower Cambrian Andrews Mountain Member of the Campito Formation are unique in comparison with the remainder of the studied section, containing a major age peak centered at ca. 1.1 Ga and a subsidiary Lower Cambrian age peak, permitting calculation of a ca. 527 +/- 12 (2 sigma) Ma maximum depositional age. These features, in addition to abundant detrital magnetite-ilmenite grains, reflect a distal source for these rocks, most likely from the ca. 1.1 Ga Pikes Peak batholith and/or the Midcontinent rift and ca. 0.53 Ga bimodal intrusions of the Oklahoma-Colorado aulacogen. In terms of zircon age distribution, allochthonous metamorphic pendants in the Snow Lake terrane of the central Sierra Nevada batholith are most similar to those of stratigraphically equivalent units in the Death Valley region and, to lesser degrees, the White-Inyo section, and the Mojave Desert region. Given the similarity and relative proximity of Death Valley facies-assemblages to the Snow Lake terrane, we suggest that the latter was not transported northward from the Mojave Desert region and instead represents footwall assemblages of a late Early to early Middle Jurassic low-angle normal fault system, probably along the outer transform-truncated margin of the Last Chance thrust stack. This model implies a few tens of kilometers of offset, in contrast to the hundreds of kilometers required by the Mojave-Snow Lake fault hypothesis.


类型Article
语种英语
国家USA ; Russia
收录类别SCI-E
WOS记录号WOS:000359010800002
WOS关键词CENTRAL SIERRA-NEVADA ; U-PB GEOCHRONOLOGY ; ROBERTS-MOUNTAINS ALLOCHTHON ; WESTERN UNITED-STATES ; DEATH-VALLEY REGION ; TECTONIC EVOLUTION ; SEDIMENTARY-ROCKS ; CONTACT-METAMORPHISM ; ISOTOPE SYSTEMATICS ; MIOGEOCLINAL ROCKS
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187493
作者单位1.Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA;
2.Missouri Univ Sci & Technol, Dept Geosci & Geol & Petr Engn, Rolla, MO 65409 USA;
3.Russian Acad Sci, Schmidt Inst Phys Earth, Moscow, Russia;
4.San Jose State Univ, Dept Geol, San Jose, CA 95192 USA
推荐引用方式
GB/T 7714
Chapman, Alan D.,Ernst, W. G.,Gottlieb, Eric,et al. Detrital zircon geochronology of Neoproterozoic-Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave-Snow Lake fault hypothesis[J],2015,127(7-8):926-944.
APA Chapman, Alan D.,Ernst, W. G.,Gottlieb, Eric,Powerman, Vladislav,&Metzger, Ellen P..(2015).Detrital zircon geochronology of Neoproterozoic-Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave-Snow Lake fault hypothesis.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,127(7-8),926-944.
MLA Chapman, Alan D.,et al."Detrital zircon geochronology of Neoproterozoic-Lower Cambrian passive-margin strata of the White-Inyo Range, east-central California: Implications for the Mojave-Snow Lake fault hypothesis".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 127.7-8(2015):926-944.
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