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| GEORGIA Downloaded by [University of Calgary] at 09:55 07 August 2017 MINERAL LOCALITY INDEX JENNINGS...JENNINGS B. GORDON, JR. P . O . Box 6214 Rome, Georgia 30162 Although perhaps best known for its gold, rutUe...rutUe, and staurolite (the state mineral), Georgia has, in fact, almost two hundred mineral species. ...have been reported and verified from the state of Georgia. The index has been compiled from the literature...be either a report on the economic geology of Georgia or a field guide for lapidaries, it excludes commercial |
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| 75275; e-mail: cjyapp@mail.smu.edu Key Words goethite, hematite, Fe(CO3)OH, paleotemperature, atmospheric...low-temperature iron(III) oxides on Earth are goethite (α -FeOOH) and hematite (α -Fe2O3). The δ 18O...1961. Science 133:1702–3). This suggests that goethite-water fractionation factors are systematic over...fractionation curves have been determined for both goethite and hematite. Although there is not yet a consensus...natural samples, oxygen isotope measurements of both goethite and hematite have provided evidence of significant |
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| Copyright © 2000 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 ⫹ .00 Pergamon...arrays of ␦D and ␦18O from hydroxyl minerals: Goethite as an example CRAYTON J. YAPP* Department of Geological...Southern Methodist University, Dallas, TX 75275-0395, USA (Received September 23, 1999; accepted in revised...goethites seem to be most closely mimicked by the goethite–water D/H and 18O/16O fractionation curves of...hydroxyl minerals. A modern surface domain (MSD) for goethite in coordinates of ␦D and ␦18O was calculated from |
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| Copyright © 2003 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/03 $30.00 ⫹ .00 Pergamon...for 18 O/16O variations in CO2 evolved from goethite during the solid-state ␣-FeOOH to ␣-Fe2O3 phase...Southern Methodist University, Dallas, TX 75275-0395, USA (Received May 23, 2002; accepted in revised form... In contrast, the measured ␦18O values of the goethite structural oxygen range from ⫺11.3 to 1.7‰. The...factor (18␣app) between plateau CO2 and initial goethite is systematically related to the rate of isothermal |
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| laterization processes over French Guiana Jean-Pierre Girard *, Philippe Freyssinet, Anne-Claire Morillon1 BRGM...Abstract Oxygen isotopic compositions of weathering goethite, hematite, kaolinite and gibbsite in duricrust...+33-238-64-39-25. E-mail address: jp.girard@brgm.fr (J.-P. Girard). 1 Current address. Institut de Physique du Globe...9 - 2 5 4 1 ( 0 2 ) 0 0 1 3 0 - 4 330 J.-P. Girard et al. / Chemical Geology 191 (2002) 329–343 1997;...1997; Giral-Kacmarcik et al., 1998; Girard et al., 2000; Poage et al., 2000; among others). From this |
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| Copyright © 1999 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 ⫹ .00 Pergamon...in oxygen and hydrogen isotopic composition of goethite and kaolinite in laterites: An integrated study...study from Yaou, French Guiana JEAN-PIERRE GIRARD,1* PHILIPPE FREYSSINET,1 and GILLES CHAZOT2 1 BRGM, 3...climate. ␦18O–␦D values determined for weathering goethite (pseudomorphs after pyrite) and kaolinite (microcrystalline...past tropical to the present equatorial climate. Goethite and kaolinite in the 5–10 m thick saprolite interval |
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| com/locate/gca 18 O/16O in CO2 evolved from goethite during some unusually rapid solid state a-FeOOH...for possible use in oxygen isotope analyses of goethite Crayton J. Yapp ⇑ Huffington Department of Earth...initial 60% of an isothermal vacuum dehydration of goethite can commonly be approximated by first order kinetics...dehydrations is related to the 18O/16O of the goethite by an apparent fractionation factor (aapp) that...exchange between CO2 and H2O during the solid-state goethite to hematite phase transition. The estimated value |
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| Copyright © 2001 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/01 $20.00 ⫹ .00 Pergamon...and ␦13C values of the Fe(CO3)OH component in goethite CRAYTON J. YAPP* Department of Geological Sciences...Methodist University, Dallas, Texas 75275-0395, USA (Received December 5, 2000; accepted in revised form...␦13C in the Fe(CO3)OH component of 49 samples of goethite (␣-FeOOH) from a wide variety of environments...of X and temperature determined for pedogenic goethite can be combined with the modern, global relation |
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| 2005 Copyright © 2005 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/05 $30.00 ⫹ .00 doi:10...Southern Methodist University, Dallas, TX, 75275-0395 USA (Received January 22, 2004; accepted in revised form...(Bird et al., 1994; Vitali et al., 2000; 2001; Girard et al., 2002). Moreover, Schroeder and Melear (1999)...analogous to that of the Fe(CO3)OH component in goethite. Such information includes the ␦13C of ancient...specimen (⬃60 g) of an Eocene-age bauxite from Saline County, Arkansas, U.S.A. This specimen exhibits a pisolitic |
 | Hren, Michael T., Lowe, Donald R., Tice, Michael M., Byerly, Gary, Chamberlain, C. Page (2006) Stable isotope and Rare Earth Element evidence for recent ironstone pods within the Archean Barberton greenstone belt, South Africa. Geochimica et Cosmochimica Acta, 70 (6) 1457-1470 doi:10.1016/j.gca.2005.11.016 | Journal (article/letter/editorial) |
| Building 320, Lomita Mall, Stanford, CA 94305, USA b Department of Geology and Geophysics, Louisiana...Louisiana State University, Baton Rouge, LA 70803-4101, USA Received 5 July 2005; accepted in revised form 17...formation of large (up to 200 m long) hematite and goethite ironstone bodies within the 3.2 to 3.5 Ga Barberton...and Rare Earth Element (REE) concentrations of goethite and hematite components of the ironstones to determine...surface and shallow subsurface spring systems. Goethite d18O values range from 0.7 to +1.0& and dD from |
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| Copyright © 1998 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/98 $19.00 1 .00 Pergamon...Southern Methodist University, Dallas, Texas 75275, USA (Received December 30, 1997; accepted in revised...Jurassic ages have goethite d18O values that range from 22.3 to 11.7 ‰. Late Cretaceous goethite from a high...environments of formation. All of the oolitic goethite d18O values analyzed for this work are consistent...useful in the determination of 18 O/16O ratios of goethite by material balance calculations (Yapp, 1991; |
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| Copyright © 2000 Elsevier Science Ltd Printed in the USA. All rights reserved 0016-7037/00 $20.00 ⫹ .00 Pergamon...92093, USA 2 Department of Earth Sciences, University of California, Santa Cruz, CA 95064, USA 3 Department...University of California San Diego, La Jolla, CA 92093, USA (Received September 27, 1999; accepted in revised...The difference (⌬␦18O) between the ␦18O value of goethite and that of local mean meteoric water ranges from...horizons where ferric oxides are forming. A marine goethite sample from Scotland and a subaqueous bog iron |
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| 00 Laser oxygen isotope analysis of weathering goethite from the lateritic profile of Yaou, French Guiana:...Abstract---Oxygen isotopic compositions of weathering goethite pseudomorphs after pyrite in the lateritic profile...of pyrite by goethite occurs at or near the weathering front and is complete. The goethite pseudomorphs...by a microcrystalline plasma of kaolinite and goethite in the upper horizons (latosol) of the profile...determination of the 61SOvalue of individual grains of goethite and the investigation of grain-to-grain variation |
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| associated with substitution of Al for Fe in synthetic goethite: Some experimental evidence and the criterion...Southern Methodist University, Dallas, TX 75275-0395, USA Received 13 April 2012; accepted in revised form...temperature nonstoichiometric (HTN) hydrogen in goethite are shown to predict the reduction in O2 yield...introduced for use in oxygen isotope analyses of goethite. The OYL sets lower limits for O2 yields that...pre-treatment and (2) complete recovery of the goethite structural oxygen during subsequent reaction with |
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| located in the Minnesota River Valley, Renville County, in southwestern Minnesota. In the Cenomanian,...study of the Fe(CO3)OH component in pisolitic goethite from the Purgatory Creek outcrop (site A, Fig...that there might be more than one generation of goethite (Feng and Yapp, 2009). This reinforced the conclusion...mineral assemblage by removing iron oxides including goethite and hematite (Jackson, 1979; Tabor and Yapp, 2005)...text). Q, quartz; K, kaolinite; Gb, gibbsite; G, goethite; Hm, hematite; Bo, boehmite; Bh, Berthierine; |
 | Poage, Michael A, Sjostrom, Derek J, Goldberg, Judd, Chamberlain, C.Page, Furniss, George (2000) Isotopic evidence for Holocene climate change in the northern Rockies from a goethite-rich ferricrete chronosequence. Chemical Geology, 166 (3) 327-340 doi:10.1016/s0009-2541(99)00220-x | Journal (article/letter/editorial) |
| climate change in the northern Rockies from a goethite-rich ferricrete chronosequence Michael A. Poage...03755-3571, USA b Department of Geology, UniÕersity of Montana, Missoula, MT 59812, USA Received 4 May...boundaries. Here we establish oxygen isotope ratios of goethite from ferricrete chronosequences formed by natural...Keywords: Paleoclimate; Holocene; Stable isotopes; Goethite; Ferricrete; Yellowstone National Park 1. Introduction...depositional environments ŽYapp, 1987,1990a,1993a,b,1997; Girard et al., 1997; Bao and Koch, 1999.. In this paper |
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| About 40 miles northeast of Montgomery in Coosa County there is an outcrop that carries considerable tin..."Cassiterite is the only tin mineral found in the district. The crystals are black or a dark mahogany color...crystals are largely found in the pegmatites of the district. "In the general area the following minerals are...might find interesting. It is scheelite from Marin County, California. It is of primary interest as it is...Andreas fault, extending from Marin County to San Luis Obispo County. Included in the Sur Series are limestone |
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| the old open pit Sodium Sulphate mine in Imperial County near BertROCKS AND MINERALS ram siding on the...crystallization set in forming the quartz and goethite which produced the onegite. Also running through...Springs, Colo. Onegite is quartz penetrated by goethite. Because this combination was first found in 1800...quartz xls (smoky quartz xls penetrated by black goethite) in cavity of brown limonitic smoky quartz—a tiny...manganese inclusions. It is an attractive specimen. GEORGIA—"Mr. E. C. Boyd of Dahlonega and Atlanta and Charles |
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| 2004 Copyright © 2004 Elsevier Ltd Printed in the USA. All rights reserved 0016-7037/04 $30.00 ⫹ .00 Pergamon...Pergamon doi:10.1016/j.gca.2003.09.002 Fe(CO3)OH in goethite from a mid-latitude North American Oxisol: Estimate...Southern Methodist University, Dallas, TX 75275-0395, USA (Received April 25, 2003; accepted in revised form...values of the Fe(CO3)OH component in pedogenic goethite from a mid-latitude Oxisol of Early Eocene age...present at the time of formation of pedogenic goethite in the Ione Fm, the concentration of 2700 ppm |
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| profile of Yaou (French Guiana) C. Innocent J. P. Girard C.Pomies P. Freyssinet BRGM, BP 6009, Orlrans...focusses on goethite pseudomorphs in the 28 m thick weathering profile of Yaou. The goethite pseudomorphs...compositions of goethite pseudomorphs are given in Girard et al. (1997). Analytical procedure Goethite pseudomorphic...range from about 1 to 1.5. In spite of this, the goethite pseudomorphs may still be suitable for U-series... LI-Th age Since Th was initially present in goethite, a simple 234u/z3~ age cannot be calculated, and |
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| isotopic composition for paleoclimatic investigations (Girard et al., 2000). In the middle part of the Amazon...quartz and kaolinite but also includes hematite, goethite, Ti oxides and zircon. Observation of well-formed...Other disordered kaolinites, such as those from Georgia (KGa-2) (Balan et al., 2000) or Charente basin...well as the fraction of Fe oxide corresponding to goethite (squares) (Fritsch et al., 2005) are reported...populations of hematite and goethite by a younger population of aluminous goethite, through dissolution and |
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| AT THE JAYVILLE MAGNETITE DEPOSIT. ST. LAWRENCE COUNTY, NEW YORK* B. F. LBoNanl, LI. S. Geological Suraey...has not been identified in other oresfrom the district. Possibly,tracesof other borates occur in a few...magnetite ores of the sort found in st. Lawrence county, magnetic Fe determined by the Davis tube method...Andrieux and Weiss (1944), Chevallier, Mathieu, and Girard (1948), Bertaut, Bochirol, and BIum (1gS0), and...west-centralninth, Oswegatchiequadrangle, St. Lawrence County, New York, is 1.25miles east of the hamlet of Kalurah |
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| crystalline basement Wolfram Kloppmann a,*, Jean-Pierre Girard b, Philippe Négrel a b a BRGM, Water Department...within the granitoids of the Poitou region, Vienne district, France, produced saline waters showing the typical...et al., 1992, 1993 Caucasian mineral waters (Georgia) Polyakov et al., 1985 Cristallin of Central Caucasus...and Vysotskii, 1982) or on thermomineral waters (Georgia: Polyakov et al., 1985). None of those studies...values higher than 10x). In the Krivoi Rog mineral district (Ukraine), brines up to 133 g l 1 have been |
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| tests of the effects of Al substitution on the goethite–water D/H fractionation factor Weimin Feng *,...University, 3225 Daniel Avenue, Dallas, TX 75275-0395, USA Received 16 April 2007; accepted in revised form...available online 25 December 2007 Abstract Twelve goethite samples with different degrees of substitution...on the hydrogen isotopic fractionation between goethite and its ambient water. The syntheses followed...indicated that, irrespective of temperature and pH, goethite was the predominant product of the syntheses in |
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| stable isotope composition of (U–Th)/He-dated goethite from the Canadian Arctic Crayton J. Yapp a,⇑,...April 2011; available online 5 May 2011 Abstract Goethite (Ax-2) from Axel Heiberg Island (80°N) on the...but U, Th, and He measurements suggest that the goethite (a-FeOOH) crystallized in the latest Miocene/Pliocene...suggests that a temperature of 3 °C could represent goethite crystallization at depths of 100–200 cm (for...the Ax-2 goethite is +6.6&, which is much more positive than expected if crystallizing goethite incorporated |
