 | Yamaguchi, Akira, Taylor, G.Jeffrey, Keil, Klaus, Floss, Christine, Crozaz, Ghislaine, Nyquist, Larry E., Bogard, Donald D., Garrison, Daniel H., Reese, Young D., Wiesmann, Henry, Shih, Chi.-Y. (2001) Post-crystallization reheating and partial melting of eucrite EET90020 by impact into the hot crust of asteroid 4Vesta âŒ4.50 Ga ago. Geochimica et Cosmochimica Acta, 65 (20) 3577-3599 doi:10.1016/s0016-7037(01)00681-0 | Journal (article/letter/editorial) | | Copyright © 2001 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/01 $20.00 â«č .00 Pergamon...LARRY E. NYQUIST,4 DONALD D. BOGARD,4 DANIEL H. GARRISON,5 YOUNG D. REESE,5 HENRY WIESMANN,5 and CHI-Y...University of Hawaiâi at Manoa, Honolulu, Hawaii 96822, USA 2 Antarctic Meteorite Research Center, National Institute...Missouri 63130, USA 4 Planetary Sciences, NASA Johnson Space Center, Houston, Texas 77058, USA 5 Lockheed-Martin...Co., 2400 NASA Road 1, Houston, Texas 77058-3696, USA (Received November 27, 2000; accepted in revised |  | | Report (issue) | | THE GARRISON AND PHILIPSBURG PHOSPHATE FIELDS, MONTANA. By J. T. PARDEE. FIELD WORK. The field work...north of Garrison and Drummond, Mont, ipoMHes FIGURE 20. Index map showing location'of Garrison and Philipsburg...report indicated by shading. referred to as the Garrison field, but a brief examination of the Philipsburg...GEOLOGY, 1916, PART I. For a base map of the Garrison field the township plats of the General Land Office...sufficient work FIGURE 21. Map showing relation of the Garrison and Philipsburg phosphate fields, Mont., to the |  | | Journal (article/letter/editorial) | | forming an augite lamella about 7.0 p m in width. A notable characteristic of the Ca profile of augite lamellae...pyroxene is a gradient near the interface between augite and low-Ca pyroxene (pigeonite). This profile suggests... 1987; Yamaguchi et al., 1996a,b). Bogard and Garrison (1995, 1997) reported a 39Ar-40Ar age of 4.485...eucrite, and diogenite (HED) meteorites (Bogard and Garrison, 1995). Ibitira is one of the key eucrites that...exsolution lamellae of augite parallel to (001). The maximum width of augite lamella is different grain |  | | Report (volume) | | Quarter of the Anaconda Quadrangle Deer Lodge County, Montana * By ALEXANDER A. WANEK and C. S. VENABLE...part -y of the Anaconda quadrangle near Butte, Montana UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON...QUARTER OF THE ANACONDA QUADRANGLE, DEER LODGE COUNTY, MONTANA By ALEXANDER A. WANES and C. S. VENABLE BARCLAY...about 52 square miles in Deer Lodge County in southwestern Montana. This quarter of the quadrangle includes...about 52 square miles in Deer Lodge County in southwestern Montana. The south and north boundaries are |  | SEARS, DEREK W. G., SYMES, STEVEN J. K., BATCHELOR, J. DAVID, AKRIDGE, D. GLEN, BENOIT, PAUL H. (1997) The metamorphic history of eucrites and eucrite-related meteorites and the case for late metamorphism. Meteoritics & Planetary Science, 32 (6) 917-927 doi:10.1111/j.1945-5100.1997.tb01581.x | Journal (article/letter/editorial) | | (1 997) 0 Meteoritical Society, 1997. Printed in USA. The metamorphic history of eucrites and eucrite-related...University of Arkansas, Fayetteville, Arkansas 72701, USA ?Present address: Community College of Southern Nevada...3200 East Cheyenne, North Las Vegas, Nevada 89030, USA *Correspondence author's e-mail address: cosmo@uafsysb...on Vesta and the HED Meteorites, Houston, Texas, USA, 1996 October 1618) (Dedicated to the memory of Paul...(b) the paired eucrites LEW the human eye can see augite lamellae with a microscope. 85300, 85302 and 85303 |  | | Journal (article/letter/editorial) | | Missouri 63130, USA Geosciences Institute, University of Tennessee, Knoxville, Tennessee 37996, USA 3Geophysical... Carnegie Institution, Washington, D. C. 20015, USA *Corresponding author. E-mail: floss@wustl.edu 2Planetary...343 © The Meteoritical Society, 2005. Printed in USA. 344 C. Floss et al. Table 1. Mineralogical modes...modes for NWA 011 (vol%). Pyroxene (pigeonite + augite) Plagioclase Olivine Silica Phosphate Opaque minerals...75Ă; 1 pixel = âŒ5 ”m) did not allow pigeonite and augite to be distinguished. We also did not specifically |  | | Journal (article/letter/editorial) | | Montana Mineral Locality Index Downloaded by [University of Nebraska, Lincoln] at 20:00 09 April 2015...2015 K NOWN AS THE TREASURE STATE, Montana is rich in mineral and gemstone localities. The state motto...The middle third of the state is known as the Montana alkali province where the sediments have MICHAEL...Indian Queen mine ca. 1905 at Farlin, Beaverhead County. 208 ROCKS & MINERALS Downloaded by [University...mines at Butte in Silver Bow County and the Black Pine mine in Granite County have produced many fine crystal |  | Buchanan, Paul C., Noguchi, Takaaki, Bogard, Donald D., Ebihara, Mitsuru, Katayama, Ikuo (2005) Glass veins in the unequilibrated eucrite Yamato 82202. Geochimica et Cosmochimica Acta, 69 (7) 1883-1898 doi:10.1016/j.gca.2004.08.022 | Journal (article/letter/editorial) | | 2005 Copyright © 2005 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/05 $30.00 â«č .00 doi:10...SR, NASA Johnson Space Center, Houston, TX 77058, USA 4 Department of Chemistry, Graduate School of Science...olivine and a silica mineral in a host of Fe-rich augite occur at the edges of pyroxenes (Fig. 3a) and are...micrometers in width) exsolution lamellae, presumably of augite, in a low-Ca pyroxene host. Mg-rich cores of zoned...electron microprobe beam to resolve the Fe-rich augite, Fe-rich olivine, and silica in the simplectic |  | | Journal (article/letter/editorial) | | University of Arkansas, Fayetteville, AR 72701, USA (Received November 30, 1990; accepted in revisedjbrm...often co-exist in the same breccias (BOGARD and GARRISON, 1989; BUNCH, 1975; CLAYTONand MAYEDA, 1978; CLAYTONet...LEW85305,2 MWG LEW86001,16 MWG LEW87004.7 MWG Moore County USNM929 Nuevo Laredo USNM1783 Pasamonte USNM897...1-4, petrographic type (subgroup) according to Powell (1969) and Floran (1978); A-C, chemical class according...Moore County, Binda) contain pyroxene which is not zoned but contains exsolution lamellae of augite (DUKE |  | ZIPFEL, J., SCHERER, P., SPETTEL, B., DREIBUS, G., SCHULTZ, L. (2000) Petrology and chemistry of the new shergottite Dar al Gani 476. Meteoritics & Planetary Science, 35 (1) 95-106 doi:10.1111/j.1945-5100.2000.tb01977.x | Journal (article/letter/editorial) | | (2000) 0 Meteoritical Society, 2000. Printed in USA. Petrology and chemistry of the new shergottite...among the basaltic shergottites. Compositions of augite and pigeonite and some of the bulk element concentrations...has an area of 50 m 2 ; abundances of pigeonite, augite, and orthopyroxene were determined from microprobe...images, it was not possible to reliably distinguish augite from pigeonite. However, magnesian-rich orthopyroxene...of a Si, Al-rich glass, and fine crystallites of augite, olivine, and Ti-chromite. Others contain, either |  | | Journal (article/letter/editorial) | | SN, NASA Johnson Space Center, Houston, TX 77058, USA (Received September 13, 1993; revision accepted...observed by TEM. In the pigeonite core the widths of augite lamellae are up to 0.06/zm, with 0.3-0.1 /zm intervals...ferroaugite rims show alternating exsolution lamellae of augite and pigeonite 0.2/~m in width. In the sheared regions...exsolved pair is as wide as those of the Moore County and Juvinas eu- H. Takeda et aL / Earth and Planetary...pigeonite. Fine-scale intergrowths of lamellar augite (thinner, mostly lighter colored) in the host pigeonite |  | Takeda, Hiroshi, Bogard, Donald D., Mittlefehldt, David W., Garrison, Daniel H. (2000) Mineralogy, petrology, chemistry, and 39Ar-40Ar and exposure ages of the Caddo County IAB iron: evidence for early partial melt segregation of a gabbro area rich in plagioclase-diopside. Geochimica et Cosmochimica Acta, 64 (7) 1311-1327 doi:10.1016/s0016-7037(99)00434-2 | Journal (article/letter/editorial) | | Copyright © 2000 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 â«č .00 Pergamon...chemistry, and 39Ar-40Ar and exposure ages of the Caddo County IAB iron: Evidence for early partial melt segregation...Houston, TX 77058, USA 4 C23, Lockheed Martin SO, 2400 Nasa Rd. 1, Houston, TX 77058, USA 2 (Received July...material rich in plagioclase and diopside in the Caddo County IAB iron meteorite. The gabbro is not a clast within...IAB silicate inclusions or winonaites, the Caddo County gabbro is enriched in the incompatible lithophile |  | Pittarello, Lidia, McKibbin, Seann, Yamaguchi, Akira, Ji, Gang, Schryvers, Dominique, Debaille, Vinciane, Claeys, Philippe (2019) Two generations of exsolution lamellae in pyroxene from Asuka 09545: Clues to the thermal evolution of silicates in mesosiderite. American Mineralogist, 104 (11) 1663-1672 doi:10.2138/am-2019-7001 | Journal (article/letter/editorial) | | the first exsolution process generated the thick augite lamellae along (100) in the temperature interval...second order of exsolution lamellae formed within augite along (001), consisting of monoclinic low-Ca pyroxene...abundance of plagioclase and pyroxene minerals (Powell 1971; Floran 1978). One of the most peculiar characteristics...system, recently re-evaluated to 0.5 °C/Ma (e.g., Powell 1969; Kulpecz and Hewins 1978; Haack et al. 1996;...closure temperature for Ar diffusion (Bogard and Garrison 1998). Haba et al. (2017) dated a younger event |  | | Journal (article/letter/editorial) | | Woods Hole Road, Woods Hole, Massachusetts 02543, USA 2 Department of Geology, University of Georgia, 210...210 Field Street, Athens, Georgia 30602, USA *Corresponding author. E-mail: asarafian@whoi.edu (Received...crosscutting silicates. Euhedral apatites in the Moore County cumulate eucrite occur as inclusions in pyroxene...Eucrites Cumulate eucrites 10 K/ K/Th 2000 Moore County 0 = 36 EET 87542 ALH 85001 0.5 EET 90020 ...were selected for this study. Gray labels (Moore County, Serra de Mage, Allan Hills (ALH) 85001, and EET |  | | Journal (article/letter/editorial) | | Copyright © 2000 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 â«č .00 Pergamon...body evolution DONALD D. BOGARD,1,* DANIEL H. GARRISON,2 and TIMOTHY J. MCCOY1,3 1 Planetary Sciences...TX 77058, USA LockheedâMartin Engineering and Johnson Space Center, Houston, TX 77058, USA 3 Department...Smithsonian Institution, Washington, DC 20560-0119, USA 2 (Received September 9, 1999; accepted in revised...be addressed 2133 2134 D. D. Bogard, D. H. Garrison, and T. J. McCoy the young isotopic ages might |  | | Report (issue) | | A note on newly discovered kimberlites in Riley County, Kansas William L. Mansker, Bill D. Richards, and...petrography of the Twin Knobs ttl lamproite, Pike County, Arkansas . 205 Michael A. Waldman, Tom E. McCandless...Potash Sulfur Springs igneous complex, Garland County, Arkansas Robert E. Zartman and J. Michael Howard...for similar rocks in the Highwood Mountains of Montana, based on oscillatory zoning in clinopyroxenes...solid solution); and Cpx = clinopyroxene (aluminous augite). The separated materials were split and analyzed |  | | Journal (article/letter/editorial) | | 77058, USA of Earth and Space Sciences, University of Washington, Seattle, Washington 98195, USA *Corresponding...AbstractâNakhlite Northwest Africa (NWA) 998 is an augite-rich cumulate igneous rock with mineral compositions...fusion-crusted meteorite consists of (by volume) âŒ75% augite (core composition Wo 39En 39Fs22), âŒ9% olivine...(Fo35), âŒ7% plagioclase (Ab61An35) as anhedra among augite and olivine, âŒ3.5% low-calcium pyroxenes (pigeonite...replacing or forming overgrowths on olivine and augite, âŒ1% titanomagnetite, and other phases including |  | Park, Jisun, Bogard, Donald D., Nyquist, Laurence E., Garrison, Daniel H., Mikouchi, Takashi (2013) ArâAr ages and trapped Ar components in Martian shergottites RBT 04262 and LAR 06319. Geochimica et Cosmochimica Acta, 121. 546-570 doi:10.1016/j.gca.2013.06.045 | Journal (article/letter/editorial) | | Bogard a,b, Laurence E. Nyquist a, Daniel H. Garrison a,d, Takashi Mikouchi e a ARES, Code KR, NASA...Houston, TX 77058, USA Lunar & Planetary Institute, 3600 Bay Area Blvd., Houston, TX 77058, USA c Department...Piscataway, NJ 08854, USA d ESCG-Barrios, JE23, 2224 Bay Area Blvd., Houston, TX 77058, USA e Department of...University of New Jersey, Piscataway, NJ 08854, USA. Tel.: +1 908 307 8536; fax: +1 732 445 5312. E-mail...(L.E. Nyquist), dan.h.garrison@nasa.gov (D.H. Garrison), mikouchi@eps.s.u-tokyo.ac.jp (T. Mikouchi). |  | Bouvier, Audrey, Blichert-Toft, Janne, Vervoort, Jeffrey D., Gillet, Philippe, AlbarĂšde, Francis (2008) The case for old basaltic shergottites. Earth and Planetary Science Letters, 266 (1) 105-124 doi:10.1016/j.epsl.2007.11.006 | Journal (article/letter/editorial) | | Arizona, Department of Geosciences, Tucson, AZ 85721, USA Ecole Normale SupĂ©rieure, Laboratoire des Sciences...Earth and Environmental Sciences, Pullman, WA 99164, USA b c Received 10 June 2007; received in revised...Exploration, Arizona State University, Tempe, AZ 85287, USA. 0012-821X/$ - see front matter © 2007 Elsevier B...ages in excess of emplacement ages (Bogard and Garrison, 1999; Mathew et al., 2003; Walton et al., 2007)...whole-rocks and mineral separates (maskelynite, augite, and pigeonite) from a 2.8 g piece of the basaltic |  | | Journal (article/letter/editorial) | | (1997) 0 Meteoritical Society, 1997. Printed in USA. Mineralogical records of early planetary processes...on Vesta and the HED Meteorites, Houston, Texas, USA, 1996 October 1&18) (Dedicated to the memory of Paul...basaltic materials with Na-rich plagioclase and augite in iron meteorites, which are the products of partial...simulation of the development of exsolution lamella of augite. The layered-crust model originally proposed was...diffusion profile of Ca of an exsolved augite lamella in the Moore County cumulate eucrite. The burial depth |  | | Journal (article/letter/editorial) | | of California, Berkeley, California 94720-7450, USA b c a r t i c l e i n f o Article history: Received...basaltic shergottites predominantly consisting of augite and pigeonite. DaG 735, Dho 019, and SaU 005 were...NMSN MPI NMSN ASU MWG: Meteorite Working Group, USA. MPI: Max-Planck-Institute fĂŒr Chemie, Mainz, Germany...State University, Tempe, USA. FMNH: Field Museum of Natural History, Chicago, USA. j Δ Gd = Ă°i Sm= 152...of a single-stage irradiation in space, Norton County is one of the best references that provide upper |  | Carlson, William D., Anderson, Susan D., Mosher, Sharon, Davidow, Joel S., Crawford, Wesley D., Lane, Edward D. (2007) High-Pressure Metamorphism in the Texas Grenville Orogen: Mesoproterozoic Subduction of the Southern Laurentian Continental Margin. International Geology Review, 49 (2) 99-119 doi:10.2747/0020-6814.49.2.99 | Journal (article/letter/editorial) | | Clinopyroxene in the Llano rocks is more commonly sodian augite than true omphacite, and garnet is commonly pyropic...body of serpentinized harzburgite, identified by Garrison (1981) as an ophiolite fragment, has been tectonically...are those at Jordan Ranch and Purdy Hill in Mason County in the western uplift, and that at Whitt Ranch...but optically continuous intergrowths of sodic augite and oligoclase that enclose partially resorbed...assemblage consisting of pyropic almandine + sodian augite + low-Al enstatite + subsilicic ferroan pargasite |  | Kagami, Saya, Haba, Makiko K., Yokoyama, Tetsuya, Usui, Tomohiro, Greenwood, Richard C. (2019) Geochemistry and SmâNd chronology of a Stannernâgroup eucrite, Northwest Africa 7188. Meteoritics & Planetary Science, 54 (11) 2710-2728 doi:10.1111/maps.13382 | Journal (article/letter/editorial) | | 87Rb-87Sr, and 39Ar-40Ar systems (Bogard and Garrison 2003). The goal of this study was to understand...extraction chromatographic resin TRU (50â100 lm; Eichrom, USA), the Nd and Sm concentrations were determined by...instrument (X-Series 2, Thermo Fisher Scientific, USA) installed at Tokyo Tech (Kagami and Yokoyama 2016)...extraction chromatographic resin (Ln Resin, Eichrom, USA) was undertaken to purify Nd (Kagami and Yokoyama...a reference rock material BHVO-2 (Basalt, USGS, USA) for evaluating the accuracy of the analyses. Approximately |  | | Journal (article/letter/editorial) | | cooling rate of ~10â4 to 10â5 ÂșC /day, produced augite exsolution up to 3 ÎŒm thick in pigeonite. Rapid...respectively], and contain the highest proportion of augite lamellae. Haraiya pyroxenes are dark gray and nearly...delineate the b-axis. Grains with both pigeonite and augite reĂections were remounted and embedded in epoxy...images. Because O concentrations do not vary between augite and pigeonite, any intensity gradient recorded... Al, and Mg across pigeonite grains with (001) augite lamellae oriented perpendicular to the plane of |  | Snyder, Gregory A, Lee, Der-Chuen, Ruzicka, Alex M, Prinz, Martin, Taylor, Lawrence A, Halliday, Alex N (2001) HfâW, SmâNd, and RbâSr isotopic evidence of late impact fractionation and mixing of silicates on iron meteorite parent bodies. Earth and Planetary Science Letters, 186 (2) 311-324 doi:10.1016/s0012-821x(01)00222-9 | Journal (article/letter/editorial) | | 37996, USA Department of Geological Sciences, University of Michigan, Ann Arbor, MI 48109, USA c Department...American Museum of Natural History, New York, NY 10024, USA Institut fu«r Isotopengeologie und Mineralische RohstoÂĄe...silicate inclusion in an iron meteorite (Caddo County, IAB), but no silicate inclusions in IIE iron meteorites...method deÂąned an age of 4.482 ĂŸ 0.025 Ga [17]. Garrison and Bogard [17] have also determined an 40 Ar^39...Weekeroo Station A consists predominantly of 30% augite phenocrysts in a cryptocrystalline (glass; 59%) |
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