Date File Created Name of Creator 4/10/2009 Sheryl Singerling GeoRef Data 2008-110000 DN GeoRef TI Late Jurassic plutonism in the southwest U. S. Cordillera AU "Barth, Andrew P; Wooden, Joseph L; Howard, Keith A; Richards, JoshuaL" AF "Indiana University-Purdue University, Department of Earth Sciences,Indianapolis, IN, United States (USA)" AF "Utah State University, United States (USA); U. S. Geological Survey,United States (USA)" MT "Ophiolites, arcs, and batholiths; a tribute to Cliff Hopson" ED "Wright, James E; Shervais, John W" AF "University of Georgia, Department of Geology, Athens, GA, UnitedStates (USA)" CF "Ophiolites, batholiths, and regional geology; a session in honor ofCliff Hopson; Geological Society of America 2005 Cordilleran Sectionmeeting, San Jose, CA, United States, April 29-May 1, 2005" SP "USGSOP, Non-USGS publications with USGS authors" SO "Special Paper - Geological Society of America, vol. 438, pp.379-396,2008" IS 0072-1077 CD GSAPAZ IB 9.78081E+12 PB "Geological Society of America (GSA), Boulder, CO, United States (USA)" DE absolute age; basins; batholiths; California; Cenozoic; chemicalcomposition; dates; fore-arc basins; geochemistry; intrusions; ionprobe data; Jurassic; magmatism; major elements; mass spectra;Mesozoic; Mojave Desert; North America; North American Cordillera;paleoenvironment; Paleogene; Paleozoic; Permian; plate tectonics;reconstruction; SHRIMP data; Southern California; Southwestern U.S.;spectra; subduction; Tertiary; thermal ionization mass spectra; traceelements; Transverse Ranges; U/Pb; United States; Upper Jurassic AB "Although plate reconstructions suggest that subduction was anapproximately steady-state process from the mid-Mesozoic through theearly Tertiary, recent precise geochronologic studies suggest highlyepisodic emplacement of voluminous continental-margin batholiths inthe U.S. Cordillera. In central and southern California and westernArizona, major episodes of batholithic magmatism are known to haveoccurred in Permian-Triassic, Middle Jurassic, and late Early to LateCretaceous time. However, recent studies of forearc-basin andcontinental-interior sediments suggest that Late Jurassic time wasprobably also a period of significant magmatism, although few datedplutons of this age have been recognized. We describe a belt of LateJurassic plutonic and hypabyssal rocks at least 200 km in length thatextends from the northwestern Mojave Desert through the TransverseRanges. The belt lies outboard of both the voluminous Middle Jurassicarc and the ca. 148 Ma Independence dike swarm at these latitudes. Theplutons include two intrusive suites emplaced between 157 and 149 Ma:a calc-alkaline suite compositionally unlike Permian-Triassic andMiddle Jurassic monzonitic suites but similar to Late Cretaceous arcplutons emplaced across this region, and a contemporaneous but notcomagmatic alkaline suite. The Late Jurassic was thus a time of bothtectonic and magmatic transitions in the southern Cordillera." LA English FE "References: 94; illus. incl. 4 tables, geol. sketch map" PY 2008 PT Serial; Conference document; Analytic CP United States (USA) LL "Latitude:N333000,N343000 Longitude:W1153000,W1171500" CL "05A, Igneous and metamorphic petrology" CY "GeoRef, Copyright 2008, American Geological Institute." UD 200819 DO 10.1130/2008.2438(13) AN 2008-110000 JV 438 JP 379-396 Sample Data Item Age Max_age Min_age LatDD LongDD Loc_prec Location_Name Rock_Class Rock_Type Collected_by Material State Units Ma Ma Ma DD DD Method 1 1 1 2 2 Sample Name AM6 152 154 150 34.6392 -118.949 0.001 Stewart Mountain pluton granodiorite plutonic Barth and others mineral California AM11 155 157 153 34.6701 -118.9822 0.001 Lockwood Creek pluton granite plutonic Barth and others mineral California PN19 165 167 163 34.0239 -115.9881 0.001 Gold Park granodiorite plutonic Barth and others mineral California JW176 161 164 158 34.0339 -115.92 0.001 Music Valley granodiorite plutonic Barth and others mineral California JW178 161 164 158 34.0342 -115.9869 0.001 Gold Park granodiorite plutonic Barth and others mineral California 179 167 168 166 34.0739 -115.8947 0.001 Marbolite Mine granite plutonic Barth and others mineral California JW180 167 168 166 34.0581 -115.8989 0.001 Marbolite Mine diorite plutonic Barth and others mineral California JW282 152 155 149 34.3545 -117.0941 0.001 Rattlesnake Mountain pluton quartz diorite plutonic Barth and others mineral California 3438 151 153 149 34.36585741 -117.092559 0.0001 Rattlesnake Mountain pluton granite plutonic Barth and others mineral California JW273 156 159 153 34.3262 -116.9777 0.001 Crystal Creek monzonite plutonic Barth and others mineral California 3436 150 152 148 34.31575576 -116.9787516 0.0001 Greenlead Creek granite plutonic Barth and others mineral California JW275 154 157 151 34.3126 -116.9057 0.001 John Bull Flat granodiorite plutonic Barth and others mineral California JW274 150 152 148 34.3208 -116.9039 0.001 John Bull Flat granite plutonic Barth and others mineral California 3422 150 153 147 34.2830454 -116.9167233 0.0001 Bertha Peak diorite plutonic Barth and others mineral California 3440 149 151 147 34.28301698 -116.882098 0.0001 Van Dusen Canyon granite plutonic Barth and others mineral California 3435 150 152 148 34.32157822 -116.940446 0.0001 Holcomb Creek rhyodacite volcanic Barth and others mineral California 3439 150 152 148 34.28476628 -116.9142553 0.0001 Holcomb Creek trachyte volcanic Barth and others mineral California 3504 151 152 150 33.98691687 -116.0438224 0.0001 White Tank granite plutonic Barth and others mineral California 3455 155 157 153 33.78784678 -115.8364761 0.0001 Cottonwood granite plutonic Barth and others mineral California JW218 157 159 155 33.7206 -115.8122 0.001 Cottonwood granite plutonic Barth and others mineral California Method Data 1 U-PB6:ZIRC 180 2 TABLE 2008-110000