Concordant paleolatitudes for Neoproterozoic ophiolitic rocks of the Trinity Complex, Klamath Mountains, California
نویسندگان
چکیده
منابع مشابه
Metamorphism, geochemistry and origin of magnesian volcanic rocks, Klamath Mountains, California
, ABSTRACT Metabasaltic rocks in the Klamath Mountains of California with 'komatiitic' major element concentrations were investigated in order to elucidate the origin of the magnesian signature. Trace-element concentrations preserve relict igneous trends and suggest that the rocks are not komatiitic basalts, but im~at~re arc rocks and within-plate alkalic lavas. Correlation of 'excess' MgO with...
متن کاملPostglacial vegetation and fire history, eastern Klamath Mountains, California, USA
Pollen and high-resolution charcoal data from Bluff Lake and Crater Lake, California, indicate similar changes in climate, vegetation and fire history during the last 15 500 years. Pollen data at Bluff Lake suggest that the vegetation between c. 15 500 and 13 100 cal. BP consisted of subalpine parkland with scattered Pinus and Abies. After 13 100 cal. BP a relatively closed forest of P. montico...
متن کاملOpen - and Closed - System Characteristics of a Tilted Plutonic System , Klamath Mountains , California
The Wooley Creek batholith and Slinkard pluton are adjacent plutons with identical U-Pb zircon ages of 161 +4/-2 Ma. The plutons dip toward each other, which suggests that they are connected in the subsurface. Geologic and thermochemical evidence shows that the Slinkard pluton is the structurally lowest part of the system and the Wooley Creek batholith the structurally highest, with a total str...
متن کاملTectonic Relations between the Galice Formation and the Condrey Mountain Schist, Klamath Mountains, Northern California
The Upper Jurassic Galice Formation and parts of its 164 to 162 Ma Josephine ophiolite basement, both of the western Klamath terrane (WKT) have been suggested to constitute lower grade equivalents of the Condrey Mountain Schist (CMS) . The high P/T CMS is exposed through a window within the Rattlesnake Creek terrane (RCT) which has been thrust westward over the WKT. The Ga lice-CMS correlation ...
متن کاملFire history and landscape dynamics in a late-successional reserve, Klamath Mountains, California, USA
The frequency, extent, and severity of ®res strongly in ̄uence development patterns of forests dominated by Douglas-®r in the Paci®c Northwest. Limited data on ®re history and stand structure suggest that there is geographical variation in ®re regimes and that this variation contributes to regional differences in stand and landscape structure. Managers need region-speci®c ®re regime data to deve...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Solid Earth
سال: 2002
ISSN: 0148-0227
DOI: 10.1029/2001jb001623