 | | Report (issue) | | the coverâTurquois crystals from Lynch Station, Virginia; x ca.; pho tograph by Neal Ycdlin; color plates...C. A. Michael. COLD NUGGET FROM SPOTSYLVANIA COUNTY: Longest dimension approximately 13 cm., photograph...of Virginia R. V. DIETRICH* Professor of Geology and Associate Dean of Arts & Sciences, Virginia Polytechnic...Polytechnic Institute Research Division Bulletin 47 Virginia Polytechnic Institute, Blacksburg, Va. 24061 *... © R. V. Dietrich and the Research Division of Virginia Polytechnic Institute, 1970 Printed and bound |  | | Journal (issue) | | DECORATIVE-ORNAMENTAL STONES OF VIRGINIA D. Allen Penick, Jr. Virginia is noted particularly for beautiful...amazonite, fine moonstone, and topaz. In addition Virginia is well known for staurolite, prehnite, turquoise...minerals, rocks and organic materials found in Virginia, which have been used as gemstones and decora...report. Many of the localities will be familiar to Virginia mineral collectors. Someof the areas mentioned...collect minerals. There has been much written on Virginia mineral localities but no reports are available |  | | Journal (issue) | | the Virginia Polytechnic Institute, Engineering Experiment Station Series, dealing with Virginia Mineral...Mineral Localities: Virginia Mineral Localities (1960 Edition) Virginia Mineral Localities (Supplement...(Supplement I) Virginia Mineral Localities (Supplement II) Virginia Minerals and Rocks (3rd Edition) Ex LIBRIS...\I i! II II BULLETIN OF THE ·, I !V I ii VIRGINIA POLYTECHNIC INSTITUTE Engineering Experiment Station...Series No. 151 Ii !I ·1 " ii :c H I I I I ! VIRGINIA MINERAL LOCALITIES ( SUPPLEMENT II ) By Richard |  | | Journal (article/letter/editorial) | | William H. Amidon a,â, Dylan H. Rood b, Kenneth A. Farley a a b California Institute of Technology, GPS...established (Dunai and Roselieb, 1996; Farley, 2002; Shuster and Farley, 2005; Copeland et al., 2007), but...apatite, titanite and kyanite (Gayer et al., 2004; Farley et al., 2006; Gayer et al., 2006; Amidon et al...epsl.2009.01.031 Ti oxides and calcite (Bryce and Farley, 2002; Kober et al., 2005; Amidon et al., 2008b)...phases due to their small size and high energy (Farley et al., 2006); 3) cosmogenic 3He must be deconvolved |  | Liu, Xuan, Fan, Hong-rui, Evans, Noreen J., Batt, Geoffrey E., McInnes, Brent I. A., Yang, Kui-feng, Qin, Ke-zhang (2014) Cooling and exhumation of the mid-Jurassic porphyry copper systems in Dexing City, SE China: insights from geo- and thermochronology. Mineralium Deposita, 49 (7) 809-819 doi:10.1007/s00126-014-0536-1 | Journal (article/letter/editorial) | | respectively (Wolf et al. 1996; Reiners and Farley 1999; Farley 2000; Farley and Stöckli 2002; Reiners 2005). It...alteration, collected from the #3 porphyry of the Yinshan mine (Table 2 in Appendix II). Three zircon grains were...collected from the Tongchang open pit of the Dexing mine (Table 2 in Appendix II). Four zircon grains from...phenocrysts contains plagioclase, quartz, hornblende, biotite; matrix consists of the same mineral assemblage;...sometimes replaced by secondary K-feldspar and biotite 10YS10 Jiuqu open pit of the Yinshan deposit |  | | Journal (article/letter/editorial) | | 21 Ne dating of biotite and hornblende William H. Amidon a,â, Kenneth A. Farley b a b Middlebury...readily measured in biotite and hornblende. 21Ne production rates in hornblende and biotite are similar, and...reaction 19F(α,n) 22Ne in F-rich phases such as biotite. Our results show that hornblende is a suitable...cosmogenic 3He dating, but that 3He is lost from biotite at Earth surface temperatures. Comparison of 3He...investigate helium and neon in hornblende and biotite. Just like in olivine and pyroxene, in these ubiquitous |  | | Journal (article/letter/editorial) | | volcanic allanite Stephen E. Cox a,â, Kenneth A. Farley a, Sidney R. Hemming b a b Division of Geological...California Institute of Technology, Pasadena, CA 91125, USA Department of Earth and Environmental Sciences and...Observatory of Columbia University, Palisades, NY 10964, USA a r t i c l e i n f o Article history: Received...from the 79 AD eruption of Mount Vesuvius, and Farley et al. (2002) dated apatite and zircon from the...decay rates of different isotopes of U and Th (Farley et al., 2002). Isotopic disequilibrium must therefore |  | | Report (chapter) | | NEf008-05 hornblende 40Ar/39Ar molybdenite Re-Os biotite K-Ar zircon fission track rutile (U-Th)/He zircon/titanite...apatite (see comprehensive reviews by Farley 2002 and Ehlers and Farley 2003). Apatite makes an ideal (U-Th)/He...al. 1987; Wolf et al. 1996; Farley et al. 1998; House et al. 1998; Farley 2002 and references therein)...history is more likely (see Wolf et al. 1998 and Farley 2002 for more discussion). Similar scenarios have...from ~75 °C to ~200 °C (Crowhurst et al. 2002; Farley 2002; Reiners et al. 2002; Evans et al. 2005). |  | Wu, Li-Yan, Stuart, Finlay M., Di Nicola, Luigia, Heizler, Matthew, Benvenuti, Marco, Hu, Rui-Zhong (2019) Multi-aliquot method for determining (UâŻ+âŻTh)/He ages of hydrothermal hematite: Returning to Elba. Chemical Geology, 504. 151-157 doi:10.1016/j.chemgeo.2018.11.005 | Journal (article/letter/editorial) | | New Mexico Bureau of Geology, Socorro NM 87801, USA d Department of Earth Sciences, University of Florence...diffusion and recoil. Hematite (n=6) from the Rio Marina mine, PT Elba (Italy) yields (U+Th)/He ages that range... Lippolt et al., MA 1993; BĂ€hr et al., 1994; Farley and Flowers, 2012). This has been confirmed by...the same sub-mg-sized fragments of material (e.g. Farley and Flower, 2012; CE Vasconcelos et al. 2013)...The ore bodies of the first type at the Rio Marina mine are typically stratiform PT E D and vein-type |  | Zhao, Junxing, Qin, Kezhang, Li, Guangming, Cao, Mingjian, Evans, Noreen J., McInnes, Brent I.A., Li, Jinxiang, Xiao, Bo, Chen, Lei (2015) The exhumation history of collision-related mineralizing systems in Tibet: Insights from thermal studies of the Sharang and Yaguila deposits, central Lhasa. Ore Geology Reviews, 65. 1043-1061 doi:10.1016/j.oregeorev.2014.09.026 | Journal (article/letter/editorial) | | and cut by calcite vein at last (D), porphyritic biotite granite (E) and granodiorite porphyry (F). All...cross-polarized light. Kf = K-feldspar, Q = quartz, Bio = biotite, Plag = plagioclase, Ser = sericite, Cc = calcite...groundmass of quartz, plagioclase, K-feldspar and minor biotite (Figs. 4A and 5A). Porphyritic granite, the central...Potassic alteration, mainly K-feldspar and secondary biotite, is mainly developed in the pre-ore intrusives...volcanic rocks, granite porphyry, porphyritic biotite granite and granodiorite porphyry (Fig. 4). Rhyolitic |  | McDannell, Kalin T., Zeitler, Peter K., Janes, Darwin G., Idleman, Bruce D., Fayon, Annia K. (2018) Screening apatites for (U-Th)/He thermochronometry via continuous ramped heating: He age components and implications for age dispersion. Geochimica et Cosmochimica Acta, 223. 90-106 doi:10.1016/j.gca.2017.11.031 | Journal (article/letter/editorial) | | this phase (e.g., Farley et al., 1996; Wolf et al., 1996; Warnock et al., 1997; Farley, 2000; Shuster et...(Murray et al., 2014), fluid and mineral inclusions, (Farley, 2002; Vermeesch et al., 2007), and broken grains...where the crystal size is the diffusion domain (Farley, 2000) and He outgassing produces a simple, smooth...kcal/mol) and ln Do/a2 = 13 m2/s (Do of 50 cm2/s); Farley (2000)). (A) Curves illustrate the difference between...observed in apatite at temperatures above 280-325°C (Farley, 2000; Shuster et al., 2006). In cases of complex |  | | Journal (article/letter/editorial) | | Geology, 1475 Jayhawk Blvd Rm 120, Lawrence, KS 66044, USA Department of Terrestrial Magnetism, Carnegie Institution...20015-1305, USA Kansas Geological Survey, 1930 Constant Ave., Lawrence, KS 66047-3726, USA a r t i c...Leonardville kimberlite pipes, located in Riley County, Kansas. Zircon from the Tuttle pipe and titanite...helium closure temperatures (Reiners and Farley, 1999; Farley, 2000; Reiners et al., 2004). As a result...kimberlites in Riley and Marshall Counties Kansas, USA. Only ïŹve kimberlites, Stockdale, Randolph 1 and |  | Zeng, Qingtao, Evans, Noreen J., McInnes, Brent I. A., Batt, Geoffrey E., McCuaig, Campbell T., Bagas, Leon, Tohver, Eric (2013) Geological and thermochronological studies of the Dashui gold deposit, West Qinling Orogen, Central China. Mineralium Deposita, 48 (3) 397-412 doi:10.1007/s00126-012-0433-4 | Journal (article/letter/editorial) | | hanging wall to the gold mineralisation at the Dashui mine and defines the contact between Middle Triassic...better way to preserve and increase the life of a mine and to maximise the potential value of a deposit...et al. 1999, 2005). Understanding structures at a mine-scale requires detailed geological mapping and kinematic...gold deposit is located in central China, in Maqu County of the Gannan Tibetan Autonomous Prefecture, Gansu...enlarging the reserves and extending the life of the mine. Herein, we seek to enhance understanding of the |  | | Journal (article/letter/editorial) | | NorthRyde,NewSouthWales 1670,Australia KENNETH A. FARLEY, Division ofGeological andPlanetary Sciences,...of the major Chuquieamataopen-pit GeologicSetting mine(Fig.1).TheChuquieamata porphyry copperorebody Chuquieamata...Fortuna T (ĂžC) Granodiorite 100 10 4OO 3OO Biotite Ar-Ar 200 K-Feldspar Ar-Ar âą âąatiteFissionTrack...t operation of an efficienthydrothermal convec- USA BilateralScienceandTechnology Collaboration protioncellalsoleadsto...westernportionof the Chuquieamata porphyrycopperde- Farley, K., Wolf,R., andSilver,L., 1996,The effectsof |  | | Journal (article/letter/editorial) | | Copyright© 1997 ElsevierScienceLtd Printed in the USA. All rights reserved 0016-7037/97 $17.00 + .00 Pergamon...Dartmouth College, Hanover, New Hampshire 03755, USA (Received February 6, 1996; accepted in revisedform...in the Kinsman Quartz Monzonite, New Hampshire, USA, and of sedimentary origin in the Dales Gorge Member...Kinsman Quartz Monzonite in the northern Appalachians, USA and (2) whole-rock samples from the Dales Gorge Member...environments (e.g., Forrester and Giles, 1972; Farley et al., 1985; Wood et al., 1991; Erel and Morgan |  | | Journal (article/letter/editorial) | | igneous and fossil tooth enamel ÂŁuorapatite K.A. Farley a; *, T.E. Cerling b , P.G. Fitzgerald c a Department...91125, USA b Department of Geology and Geophysics, University of Utah, Salt Lake City, UT 84112 USA c Department...Sciences, Syracuse University, Syracuse, NY 13244 USA Received 2 August 2000; received in revised form...+1-626-395-6005; Fax: +1-626-568-0935; E-mail: farley@gps.caltech.edu 0012-821X / 01 / $ ^ see front...0 ) 0 0 3 6 0 - 5 EPSL 5711 17-1-01 8 K.A. Farley et al. / Earth and Planetary Science Letters 185 |  | WARTHO, Jo-Anne, VAN SOEST, Matthijs C., KING, David T., PETRUNY, Lucille W. (2012) An (U-Th)/He age for the shallow-marine Wetumpka impact structure, Alabama, USA. Meteoritics & Planetary Science, 47 (8) 1243-1255 doi:10.1111/j.1945-5100.2012.01381.x | Journal (article/letter/editorial) | | shallow-marine Wetumpka impact structure, Alabama, USA Jo-Anne WARTHO1*, Matthijs C. van SOEST1, David T...Tempe, Arizona 85287, USA 2 Geology OfïŹce, Auburn University, Auburn, Alabama 36849, USA * Corresponding author...grains from the Wetumpka impact structure, Alabama, USA. This small approximately 5â7.6 km impact crater...made to allow a-ejection corrections to be made (Farley et al. 1996). To ensure that the measurements were...effects following methods described in Farley et al. (1996) and Farley (2002) for apatite and Hourigan et |  | | Journal (article/letter/editorial) | | drill hole Daniel F. Stockli a,b,*, Kenneth A. Farley b b a Geology Department, University of Kansas...Kansas, 120 Lindley Hall, Lawrence, KS 66045-7613, USA Division of Geological and Planetary Sciences, California...California Institute of Technology, Pasadena, CA 91125, USA Received 17 February 2003; accepted 8 March 2004...Kansas, 120 Lindley Hall, Lawrence, KS 66045-7613, USA. Fax: +1-785-864-5276. E-mail address: stockli@ku...et al., 2000, 2002; Reiners, 2002; Farley, 2002; Ehlers and Farley, 2003). Other U- and Th-bearing minerals |  | Wang, Yinzhi, Wang, Fei, Wu, Lin, Shi, Wenbei, Yang, Liekun (2018) (U-Th)/He thermochronology of metallic ore deposits in the Liaodong Peninsula: Implications for orefield evolution in northeast China. Ore Geology Reviews, 92. 348-365 doi:10.1016/j.oregeorev.2017.11.025 | Journal (article/letter/editorial) | | plagiogranite; (2) the Upper Triassic Shuangdinggou biotite monzogranite and Xinling granite, and (3) the Middle...QCZ2, QCZ3, QCZ4 and QCZ5, which are made up of biotite monzogranite, were collected from the Shuangdinggou...Sanguliu granodiorite, the Dingqishan porphyritic biotite granite and the Wulongbei porphyritic granite yielded...older ages). Samples QCZ2, QCZ3, QCZ4 and QCZ5 are biotite monzogranite and were collected from different...were collected from the Dingqishan porphyritic biotite granite. Although the zircon grains selected from |  | | Journal (article/letter/editorial) | | University, PO Box 876004, Tempe, AZ 85287-6004, USA Received 11 January 2017; accepted in revised form...McClure Mountain syenite of south-central Colorado, USA. We present new zircon, titanite, and apatite conventional...surface and near-surface processes (e.g. Farley, 2002; Ehlers and Farley, 2003; Reiners and Brandon, 2006)....McClure Mountain syenite of south-central Colorado, USA aïŹords an opportunity to empirically test ZRDAAM...syenite include K-feldspar, plagioclase, hornblende, biotite, and clinopyroxenes, but signiïŹcant amounts of |  | | Journal (article/letter/editorial) | | ssiontrack annealing (e.g. Gleadow et al. 1986; Farley 2000; Cochrane et al. 2014). 2 Section of Earth...Fission track zircon ArâAr biotite Fission track titanite RbâSr biotite ArâAr muscovite UâPb rutile...and on the distribution of the parent isotopes. Farley et al. (1996) show that the magnitude of this correction...amount of He loss by diffusion for any given tâT. Farley et al. (2011) formulated a method to quantify the...t s di He diffusion properties in apatite (e.g. Farley 2000) Re have defi ned a bulk closure temperature |  | | Journal (article/letter/editorial) | | Ellensburg, WA, USA 2 Department of Geological Sciences, University of Colorado Boulder, CO, USA * IP T ...g., AN Zeitler et al., 1987; Farley et al., 2000; Reiners and Farley, 1999; Reiners et al., 2000; Reiners...Reiners et al., 2002; Stockli and Farley, 2004) quickly lead to their use in constraining cooling and...consists of pyroxene-olivineplagioclase rocks, biotite-hornblende syenite, mafic nepheline-bearing rocks...MANUSCRIPT 523.3 ± 1.8 Ma (Spell and McDougall, 2003). Biotite K-Ar dates from multiple lithologies within the |  | | Journal (article/letter/editorial) | | 2004 Copyright © 2004 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/04 $30.00 â«č .00 Pergamon...06511, USA Department of Geoscience, University of Nevada, Las Vegas, Las Vegas, NV 89154, USA (Received...(Wolf et al., 1996; Farley et al., 1996; Farley, 2000) and titanite (Reiners and Farley, 1999) motivated...these with zircon (U-Th)/Pb, garnet Sm/Nd, and biotite Rb/Sr ages of related samples. Zircon He ages of...of these samples are similar to those of biotite Rb/Sr ages, which may suggest a higher closure temperature |  | | Journal (article/letter/editorial) | | Alaska Fairbanks, Fairbanks, Alaska 99775-5780, USA Division of Geological and Planetary Sciences, California...Technology, MS 100-23, Pasadena, California 91125, USA 3 Department of Geology, 428 Ho Science Center, Colgate...University, 13 Oak Drive, Hamilton, New York 13346, USA 1 doi:10.1130/GES01224.1 2 10 figures; 2 tables;.../GES01224.1. The Sierra Nevada batholith (California, USA) hosts multiple shear zones of different ages and...syntheses and maps of U-Pb zircon and hornblende and biotite Ar age distributions through the batholith in order |  | Reiners, Peter W, Brady, Robert, Farley, Kenneth A, Fryxell, Joan E, Wernicke, Brian, Lux, Daniel (2000) Helium and argon thermochronometry of the Gold Butte block, south Virgin Mountains, Nevada. Earth and Planetary Science Letters, 178 (3) 315-326 doi:10.1016/s0012-821x(00)00080-7 | Journal (article/letter/editorial) | | Peter W. Reiners a; *, Robert Brady a , Kenneth A. Farley a , Joan E. Fryxell b , Brian Wernicke a , Daniel...California Institute of Technology, Pasadena, CA 91125, USA b Department of Geological Sciences, California State...CA 92407, USA c Department of Geological Sciences, University of Maine, Orono, ME 04469, USA Received...the Basin and Range province of the southwestern USA is the Gold Butte block of the south Virgin Mountains...crosssection of crust exposed in the southwestern USA. Ă 2000 Elsevier Science B.V. All rights reserved |
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