Date File Created Name of Creator 2/13/2008 Sarah Evans GeoRef Data 2006-013198 DN GeoRef TI Timing of Cenozoic volcanism and Basin and Range extension innorthwestern Nevada; new constraints from the northern Pine ForestRange AU "Colgan, Joseph P; Dumitru, Trevor A; McWilliams, Michael O; Miller,Elizabeth L" AF "Stanford University, Department of Geological and EnvironmentalSciences, Stanford, CA, United States (USA)" SP "USGSOP, Non-USGS publications with USGS authors" SO "Geological Society of America Bulletin, vol.118, no.1-2, pp.126-139,Feb 2006" IS 0016-7606 CD BUGMAF DE absolute age; apatite; Ar/Ar; basalts; Basin and Range Province; basinrange structure; Cenozoic; correlation; dates; dip-slip faults;Eocene; exhumation; extension; extension faults; faults; fission-trackdating; geochemistry; Humboldt County Nevada; igneous rocks; lava;lava flows; major elements; Miocene; Neogene; Nevada; normal faults;North America; Oligocene; Paleogene; phosphates; Pine Forest Range;Tertiary; trace elements; United States; uplifts; volcanic rocks;volcanism AB "Eocene-middle Miocene volcanic rocks in the northern Pine ForestRange, Nevada, are ideally situated for reconstructing the timing andstyle of volcanism and extensional faulting in the northwesternmostpart of the Basin and Range province. A conformable sequence ofCenozoic volcanic and sedimentary strata in the northern Pine ForestRange dips approximately 30 degrees W, and 11 new (super 40) Ar/(super 39) Ar ages from this sequence define 3 major episodes ofvolcanic activity. Pre-Tertiary basement and older (ca. 38 Ma)Tertiary intrusive rocks are overlain unconformably by Oligocene (ca.30-23 Ma) basalt flows and dacitic to rhyolitic ash-flow tuffsinterbedded with fine-grained tuffaceous sedimentary rocks. Oligocenerocks are overlain by approximately 550 m of ca. 17-16 Ma basalt flowsequivalent to the Steens Basalt in southern Oregon, and basalt flowsare capped by a thin 16.3 Ma ignimbrite that likely is correlativewith either the Idaho Canyon Tuff or the Tuff of Oregon Cany!" " on. Thenorthern Pine Forest Range is bounded to the east by a majordown-to-the-east normal fault that dips approximately 40 degrees Ewith well-developed fault striations indicative of dip-slip motion.This fault initiated at an angle of approximately 70 degrees and wasrotated approximately 30 degrees during uplift of the range. A suiteof 17 apatite fission-track ages from the Pine Forest footwall blockdemonstrates that exhumation, uplift, and slip on the range-boundingfault began ca. 12-11 Ma and continued until at least 7 Ma, withmoderate slip since then. The Pine Forest Range did not undergosignificant extension before or during peak Oligocene and Miocenevolcanism, and similar geologic relationships in nearby ranges suggestthat a larger region of northwestern Nevada was also little extendedduring this interval. Basin and Range faulting in northwestern Nevadaappears to have begun no earlier than 12 Ma, making it distinctlyyounger than deformation in much of central and sout!" " hern Nevada, wherepeak extension occurred in the middle Miocen!" e or ear "lier.""" LA English NT With GSA Data Repository Item 2006013 FE "References: 63; illus. incl. sect., 2 tables, geol. sketch maps" PY 2006 PT Serial; Analytic CP United States (USA) LL "Latitude:N413000,N420000 Longitude:W1183000,W1185230" CL 16 Structural geology; 03 Geochronology CY "GeoRef, Copyright 2007, American Geological Institute. Referenceincludes data supplied by the Geological Society of America, Boulder,CO, United States" UD 200605 DO 10.1130/B25681.1 AN 2006-013198 Sample Data Item Lat_DD Long_DD Loc_prec Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age Age Max_age Min_age SiO2 Al2O3 TiO2 FeO MnO CaO MgO K2O Na2O P2O5 Ni Cr V Ga Cu Zn Ba Th Nb Y Hf Ta U Pb Rb Cs Sr Sc Zr La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Age Age_max Age_min Sample_description Sample comment Rock_class Rock_type Material State Units DD DD Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma Ma wt % wt % wt % wt % wt % wt % wt % wt % wt % wt % ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm ppm Ma Ma Ma Method 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7 7 8 8 8 9 9 9 10 10 10 11 11 11 11 11 11 11 11 11 11 12 12 12 12 12 12 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 14 14 14 Sample Name JC02-PF25 41.7694 -118.5908 0.0001 15.77 16.48 15.06 16.33 17.28 15.38 46.68 15.93 1.67 11.12 0.19 9.26 9.67 0.7 2.63 0.26 225 144 282 18 178 92 241.93 0.51 6.03 22.55 2.75 0.39 0.18 1.85 9.06 0.11 434.5 29.73 97.11 9.32 21.51 3 14.51 4.25 1.51 4.54 0.75 4.52 0.91 2.34 0.32 1.94 0.3 Steens basalt Basalt Volcanic whole rock Nevada JC02-PF23 41.7892 -118.7036 0.0001 15.97 16.26 15.68 16.07 16.36 15.78 47.12 16.93 1.85 11.82 0.18 9.28 7.69 0.85 2.86 0.29 160 81 294 19 193 96 293.17 0.55 6.85 24.63 3.05 0.45 0.17 2.04 11.81 0.12 940.18 26.54 109.05 10.96 25.42 3.52 16.93 4.77 1.7 5 0.8 4.8 0.96 2.45 0.64 2.05 0.31 Steens basalt Basalt Volcanic whole rock Nevada JC02-PF24 41.7836 -118.7011 0.0001 16.2 16.76 15.64 17.1 18.9 15.3 48.15 15.59 1.34 10.35 0.18 10.74 8.94 0.66 2.48 0.18 172 332 280 14 139 72 217.79 0.61 4.09 20.87 2.21 0.25 0.21 1.64 9.38 0.08 412.54 38.25 78.27 7.58 16.87 2.35 11.39 3.5 1.27 3.9 0.65 4.07 0.82 2.2 0.31 1.83 0.29 Steens basalt sill below Ashdown Tuff Basalt Volcanic whole rock Nevada JC02-PF21 41.7992 -118.705 0.0001 23.65 23.82 23.48 23.51 23.96 23.06 52 16.37 1.48 8.45 0.1 7.94 5.38 2.41 3.29 0.64 152 311 213 18 56 83 790.46 3.98 21.03 21.5 4.53 1.24 1.02 4.63 69.42 0.8 785.44 22.55 169.07 28.5 55.64 6.77 28.62 6.24 1.92 5.31 0.76 4.22 0.79 2.04 0.28 1.68 0.26 Thin Basalt flow above Ashdown Tuff Basalt Volcanic whole rock Nevada JC02-PF13 41.8003 -118.6939 0.0001 26.2 26.59 25.81 26.06 26.48 25.64 49.53 16.7 1.7 9.87 0.18 8.6 7.15 1.54 3.07 0.5 97 156 256 17 93 90 552.13 2.44 7.08 22.83 2.71 0.39 0.68 5.2 17.43 1.24 931.37 30.11 97.02 21.2 44.08 5.67 25.41 6 1.89 5.29 0.77 4.4 0.86 2.26 0.32 1.92 0.29 Thin Basalt flow below Ashdown Tuff Basalt Volcanic whole rock Nevada JC02-PF27 41.78 -118.6686 0.0001 30.07 30.47 29.67 29.59 30.41 28.77 54.53 16.2 1.09 6.83 0.11 7.23 5.66 1.94 3.76 0.5 116 228 172 17 62 89 1049.11 5.57 8.71 15.7 3.49 0.52 1.73 10.31 48.33 2.03 1021.61 20.03 130.21 28.92 54.78 6.52 27.41 5.77 1.68 4.51 0.61 3.22 0.59 1.46 0.2 1.2 0.18 Oldest basalt flow in paleovalley Basalt Volcanic whole rock Nevada JC02-PF42 41.77 -118.6786 0.0001 38.21 38.5 37.92 38.66 39.03 38.29 Trachyandesite porphyry Trachyandesite Volcanic mineral Nevada JC02-PF46 41.7717 -118.7314 0.0001 16.32 16.46 16.17 Tuff of Oregon Canyon? Or Idaho Canyon? Tuff Volcanic mineral Nevada JC02-PF17 41.7989 -118.7039 0.0001 25.27 25.44 25.1 Ash-flow tuff above Ashdown Tuff Tuff Volcanic mineral Nevada JC02-PF28 41.8294 -118.7003 0.0001 26.09 26.4 25.78 Ashdown Tuff at Ashdown Mine Tuff Volcanic mineral Nevada JC02-PF3 41.8294 -118.6944 0.0001 26.9 28 25.8 "Tuff of Alder Creek, south Ashdown Mine" Tuff Volcanic mineral Nevada JC00-PF1 41.7694 -118.5908 0.0001 8.8 9.9 7.7 Granite Plutonic mineral Nevada JC01-PF2 41.76 -118.5947 0.0001 11 12 10 Granite Plutonic mineral Nevada JC01-PF3 41.7617 -118.5983 0.0001 9.3 10.3 8.3 Granite Plutonic mineral Nevada JC01-PF4 41.7625 -118.6017 0.0001 10.8 11.8 9.8 Granite Plutonic mineral Nevada JC01-PF5 41.7631 -118.6058 0.0001 11.1 12.1 10.1 Granite Plutonic mineral Nevada JC01-PF6 41.7636 -118.6114 0.0001 12 13 11 Granite Plutonic mineral Nevada JC01-PF7 41.7653 -118.6161 0.0001 14 15.2 12.8 Granite Plutonic mineral Nevada JC01-PF8 41.7653 -118.6214 0.0001 24.7 26.6 22.8 Granite Plutonic mineral Nevada JC01-PF9 41.7636 -118.6294 0.0001 33.7 35.5 31.9 Granite Plutonic mineral Nevada JC01-PF10 41.7642 -118.6364 0.0001 33.1 34.8 31.4 Granite Plutonic mineral Nevada JC01-PF11 41.7642 -118.6444 0.0001 21.8 22.9 20.7 Granite Plutonic mineral Nevada JC01-PF12 41.7647 -118.6539 0.0001 39.2 41.1 37.3 Granite Plutonic mineral Nevada JC01-PF13 41.7642 -118.6633 0.0001 83.1 85.9 80.3 Granite Plutonic mineral Nevada JC01-PF14 41.7636 -118.6731 0.0001 75 77.4 72.6 Granite Plutonic mineral Nevada JC01-PF44 41.5667 -118.7556 0.0001 79.3 83.3 75.3 Granite Plutonic mineral Nevada JC01-PF47 41.7964 -118.5911 0.0001 7.3 8.3 6.3 Granite Plutonic mineral Nevada JC01-PF48 41.7297 -118.5867 0.0001 7 7.7 6.3 Granite Plutonic mineral Nevada JC02-PF20 41.7833 -118.6908 0.0001 59.69 17.94 0.98 5.83 0.08 5.8 2.05 2.59 4.37 0.49 36 35 137 21 37 94 1175.4 5.4 7.98 15.83 3.98 0.51 1.53 12.38 46.57 0.73 1087.38 11.05 146.21 33.62 63.34 7.65 31.62 6.44 1.8 4.94 0.63 3.21 0.58 1.41 0.19 1.16 0.18 38.21 38.5 37.92 Andesite porphyry Andesite Volcanic whole rock Nevada JC02-PF49 41.7094 -118.7544 0.0001 61.97 17.94 0.59 3.86 0.07 4.25 1.55 2.84 4.72 0.33 5 5 63 23 14 85 1430.57 6.13 8.63 16.19 4.61 0.5 1.94 14.02 52.7 0.51 1048.75 4.6 177.6 39.44 72.48 8.58 33.48 6.62 1.78 4.4 0.6 3.22 0.57 1.47 0.21 1.32 0.21 38.21 38.5 37.92 Andesite porphyry Andesite Volcanic whole rock Nevada JC02-PF10 41.795 -118.6944 0.0001 68.43 16.46 0.54 2.32 0.12 1 0.29 5.57 5.25 0.03 6 0 33 19 6 56 936.44 17.95 24.98 30.08 10.25 1.7 5.88 16.76 144.33 5.27 148.7 5.83 410.8 42.01 70.24 8.53 31.87 6.25 1.28 5.28 0.84 5.05 1.04 2.96 0.46 3.05 0.5 26.9 28 25.8 Tuff of Alder Creek Tuff Volcanic whole rock Nevada JC02-PF50 41.7114 -118.7889 0.0001 67.86 15.71 0.52 2.31 0.08 1.18 0.36 5.15 5.18 0.37 5 0 19 18 6 53 1099.19 16.59 23.2 23.69 9.74 1.61 54.5 10.18 134.46 3.99 183.96 5.21 380.13 37.54 69.16 7.5 27.66 5.47 1.29 4.4 0.69 4.22 0.86 2.45 0.38 2.54 0.43 26.9 28 25.8 Tuff of Alder Creek Tuff Volcanic whole rock Nevada JC02-PF28 41.8294 -118.7003 0.0001 71.02 14.23 0.42 2.29 0.07 0.31 0.24 5.47 5.01 0.13 7 8 16 23 3 71 176.85 15.81 42.7 46.74 12.65 2.97 5.26 16.01 142.83 3.12 44.65 7.37 480.54 53.97 100.34 11.27 42.54 9.13 0.86 7.83 1.33 8.18 1.67 4.68 0.73 4.72 0.73 26.09 26.4 25.78 Ashdown Tuff Tuff Volcanic whole rock Nevada JC03-PF60A 41.5928 -118.8486 0.0001 68.91 15.53 0.51 2.22 0.14 0.49 0.33 5.23 5.69 0.12 9 5 19 18 4 82 341.66 12.51 36.23 39.45 10.15 2.45 4.26 14.69 119.74 2.87 58.99 8.66 390.33 47.52 92.89 10.33 40.32 8.84 1.32 7.63 1.22 7.35 1.49 3.98 0.61 3.76 0.61 26.09 26.4 25.78 Ashdown Tuff Tuff Volcanic whole rock Nevada JC03-PF60B 41.5928 -118.8486 0.0001 70.61 13.19 0.38 1.99 0.15 0.29 0.23 6.49 3.89 0.05 1 0 16 24 2 106 13.25 18.32 52.5 54.05 15.21 3.6 6.18 22 169.38 5.78 2.75 7.92 591.81 63.39 119.18 13.21 48.5 10.46 0.77 8.77 1.52 9.46 1.95 5.48 0.85 5.44 0.88 26.09 26.4 25.78 Ashdown Tuff Tuff Volcanic whole rock Nevada JC02-PF52 41.7381 -118.8358 0.0001 74.19 11.3 0.21 2.88 0.04 0.23 0.16 5.65 2.93 0.02 1 0 3 22 4 181 36.28 17.96 33.01 99.43 16.77 2.19 6.83 29.54 196.36 5.37 15.22 1.33 625.7 68.52 133.33 16.29 67.79 16.83 0.76 16.27 2.81 17.63 3.67 10.27 1.51 9.44 1.47 16.32 16.47 16.17 Miocene Tuff Tuff Volcanic whole rock Nevada JC02-PF45 41.7586 -118.7147 0.0001 76.1 11.53 0.21 2.63 0.04 0.23 0.09 4.68 4.4 0.04 3 0 13 23 3 167 46.44 17.59 27.08 89.74 16.38 2.14 5.91 25.28 171.48 3.72 10.49 2.03 583.95 65.12 122.48 15.67 65.03 15.99 0.84 14.91 2.59 16.16 3.29 9.2 1.39 8.73 1.37 16.32 16.47 16.17 Miocene Tuff Tuff Volcanic whole rock Nevada Method Data 1 TABLE 2006-013198 2 AR-AR:GM 180 3 AR-AR:BIO 180 4 AR-AR:Plateau Age:GM 180 5 AR-AR:Plateau Age: BIO 180 6 AR-AR:Isochron Age:GM 180 7 AR-AR:Isochron Age: BIO 180 8 AR-AR:SAN 180 9 AR-AR:ANORTHOCLASE 180 10 FIS:APATITE 11 11 NN 57 12 XRF 57 13 ICP-MS 57 14 REG_CORR 2006-013198