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  1. A magnetic signature of tree rings was tested as a potential paleo-climatic indicator. We examined wood from sequoia tree, located in Mountain Home State Forest, California, whose tree ring record spans over t...

    Authors: Gunther Kletetschka, Petr Pruner, Daniela Venhodova and Jaroslav Kadlec
    Citation: Geochemical Transactions 2007 8:2
  2. Seasonal changes in pore water and sediment redox geochemistry have been observed in many near-surface sediments. Such changes have the potential to strongly influence trace metal distribution and thus create ...

    Authors: Carla M Koretsky, Johnson R Haas, Douglas Miller and Noah T Ndenga
    Citation: Geochemical Transactions 2006 7:11
  3. Samples of vitrified and unvitrified Eocene woody plant tissues collected from the Fossil Forest site, Geodetic Hills, Axel Heiberg Island, have been characterized by TMAH thermochemolysis. All samples are gym...

    Authors: Paul E Kaelin, William W Huggett and Ken B Anderson
    Citation: Geochemical Transactions 2006 7:9
  4. The chemolithoautotrophic bacterium, Acidithiobacillus ferrooxidans, commonly occurs in acid mine drainage (AMD) environments where it is responsible for catalyzing the oxidation of pyrite and concomitant develop...

    Authors: Jun Hao, Curtis Cleveland, Eelin Lim, Daniel R Strongin and Martin AA Schoonen
    Citation: Geochemical Transactions 2006 7:8
  5. Seawater is constantly circulating through oceanic basement as a low-temperature hydrothermal fluid (<150°C). In cases when ultramafic rocks are exposed to the fluids, for instance during the initial phase of ...

    Authors: Nils G Holm, Marion Dumont, Magnus Ivarsson and Cécile Konn
    Citation: Geochemical Transactions 2006 7:7
  6. In this study, a series of interaction coefficients of the Brønsted-Guggenheim-Scatchard specific interaction theory (SIT) have been estimated up to 200°C and 400 bars. The interaction coefficients involving Cl- ...

    Authors: Yongliang Xiong
    Citation: Geochemical Transactions 2006 7:4
  7. Pyrite, the most abundant metal sulphide on Earth, is known to spontaneously form hydrogen peroxide when exposed to water. In this study the hypothesis that pyrite-induced hydrogen peroxide is transformed to h...

    Authors: Corey A Cohn, Steffen Mueller, Eckard Wimmer, Nicole Leifer, Steven Greenbaum, Daniel R Strongin and Martin AA Schoonen
    Citation: Geochemical Transactions 2006 7:3
  8. Upper Cretaceous amber from the Raritan Formation (Sayerville, New Jersey) has been investigated by Pyrolysis-GC-MS and Pyrolysis-GC-matrix isolation FTIR-MS. Results establish the existence of two distinct fo...

    Authors: Ken B Anderson
    Citation: Geochemical Transactions 2006 7:2
  9. The results of experiments designed to test the hypothesis that near-surface molecular structure of iron oxide minerals influences adhesion of dissimilatory iron reducing bacteria are presented. These experime...

    Authors: Andrew L Neal, Tracy L Bank, Michael F Hochella Jr and Kevin M Rosso
    Citation: Geochemical Transactions 2005 6:77
  10. Experimental batch and miscible-flow cultures were studied in order to determine the mechanistic pathways of microbial Fe(III) respiration in ferruginous smectite clay, NAu-1. The primary purpose was to resolv...

    Authors: S Erin O'Reilly, Janet Watkins and Yoko Furukawa
    Citation: Geochemical Transactions 2005 6:67
  11. A synthetic Topopah Spring Tuff water representative of one type of pore water at Yucca Mountain, NV was evaporated at 95°C in a series of experiments to determine the geochemical controls for brines that may ...

    Authors: Maureen Alai, Mark Sutton and Susan Carroll
    Citation: Geochemical Transactions 2005 6:31
  12. We conducted reversed deliquescence experiments in saturated NaCl–NaNO3–H2O, KNO3–NaNO3–H2O, and NaCl–KNO3–H2O systems from 90 to 120°C as a function of relative humidity and solution composition. NaCl, NaNO3, an...

    Authors: Susan Carroll, Laura Craig and Thomas J Wolery
    Citation: Geochemical Transactions 2005 6:19
  13. Mining activities in the US Western Phosphate Resource Area (WPRA) have released Se into the environment. Selenium has several different oxidation states and species, each having varying degrees of solubility,...

    Authors: Amy L Ryser, Daniel G Strawn, Matthew A Marcus, Jodi L Johnson-Maynard, Mickey E Gunter and Gregory Möller
    Citation: Geochemical Transactions 2005 6:1
  14. Backfills of dredged sediments onto a former sand and gravel mine site in Charles City County, VA may have the potential to contaminate local groundwater. To evaluate the mobility of trace elements and to iden...

    Authors: Jianwu Tang, G Richard Whittecar, Karen H Johannesson and W Lee Daniels
    Citation: Geochemical Transactions 2004 5:49
  15. The reactivity of a mineral surface is determined by the variety and population of different types of surface sites (e.g., step, kink, adatom, and defect sites). The concept of "adsorbed nutrient" has been bui...

    Authors: Carrick M. Eggleston, Andrew G. Stack, Kevin M. Rosso and Angela M. Bice
    Citation: Geochemical Transactions 2004 5:33
  16. The Richmond Mine at Iron Mountain, Shasta County, California, USA provides an excellent opportunity to study the chemical and biological controls on acid mine drainage (AMD) generation in situ, and to identify k...

    Authors: Gregory K Druschel, Brett J Baker, Thomas M Gihring and Jillian F Banfield
    Citation: Geochemical Transactions 2004 5:13
  17. Rhizophora mangle L. (red mangrove) is the dominant species of mangrove in the Americas. At Twin Cays, Belize (BZ) red mangroves are present in a variety of stand structures (tall >5 m in height, transition ~2–4 ...

    Authors: Barbara J Smallwood, Matthew J Wooller, Myrna E Jacobson and Marilyn L Fogel
    Citation: Geochemical Transactions 2003 4:38
  18. The effect of a diacetylene-containing phospholipid on the oxidation of pyrite, FeS2, was investigated. Earlier work reported by our research group showed that the adsorption of l,2-bis(10,12-tricosadiynoyl)-sn-g...

    Authors: Xiang Zhang, Michael J Borda, Martin AA Schoonen and Daniel R Strongin
    Citation: Geochemical Transactions 2003 4:8
  19. Phase transformation and crystal growth in nanoparticles may happen via mechanisms distinct from those in bulk materials. We combine experimental studies of as-synthesized and hydrothermally coarsened titania (Ti...

    Authors: Benjamin Gilbert, Hengzhong Zhang, Feng Huang, Michael P Finnegan, Glenn A Waychunas and Jillian F Banfield
    Citation: Geochemical Transactions 2003 4:20
  20. A sampling protocol for the retention, extraction, and analysis of sulfoxyanions in hydrothermal waters has been developed in the laboratory and tested at Yellowstone National Park and Green Lake, NY. Initial ...

    Authors: Greg K Druschel, Martin AA Schoonen, D Kirk Nordstrom, James W Ball, Yong Xu and Corey A Cohn
    Citation: Geochemical Transactions 2003 4:12
  21. Formation constants for thioarsenite species have been determined in dilute solutions at 25°C, ΣH2S from 10-7.5 to 10-3.0 M, ΣAs from 10-5.6 to 10-4.8 M, and pH 7 and 10. The principal inorganic arsenic species i...

    Authors: Richard T Wilkin, Dirk Wallschläger and Robert G Ford
    Citation: Geochemical Transactions 2003 4:1
  22. Highly concentrated NaCl brines are important geothermal fluids; chloride complexation of metals in such brines increases the solubility of minerals and plays a fundamental role in the genesis of hydrothermal ...

    Authors: David M. Sherman and Matthew D. Collings
    Citation: Geochemical Transactions 2002 3:102
  23. We have identified important chemical reactions that control the fate of metal-contaminated estuarine sediments if they are left undisturbed (in situ) or if they are dredged. We combined information on the molecu...

    Authors: Susan Carroll, Peggy A. O'Day, Brad Esser and Simon Randall
    Citation: Geochemical Transactions 2002 3:81
  24. It is well established through field observations, experiments, and chemical models that oxidation (redox) state and pH exert a strong influence on the speciation of dissolved components and the solubility of ...

    Authors: Thomas H. Giordano
    Citation: Geochemical Transactions 2002 3:56
  25. δ13C values of crop and forest soils were measured 8 years after disposal of paper sewage sludge. The carbon transfer from paper sludge downward to the first humic layer is evidenced by a 13C-enrichnient of up to...

    Authors: Eric Lichtfouse, Karyne Rogers, Cécile Payet and Jean-Christophe Renat
    Citation: Geochemical Transactions 2002 3:48
  26. A procedure was developed for the determination of element distributions in cross-sections of ferromanganese concretions using laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). The effec...

    Authors: Mikael D. Axelsson, Ilia Rodushkin, Douglas C. Baxter, Johan Ingri and Björn Öhlander
    Citation: Geochemical Transactions 2002 3:40
  27. To understand the aqueous species important for transport of rhenium under supercritical conditions, we conducted a series of solubility experiments on the Re–ReO2 buffer assemblage and ReS2. In these experiments...

    Authors: Yongliang Xiong and Scott A. Wood
    Citation: Geochemical Transactions 2002 3:1
  28. Bottom trawling causes physical disturbance to sediments particularly in shelf areas. The disturbance due to trawling is most significant in deeper areas with softer sediments where levels of natural disturban...

    Authors: Daniel E Duplisea, Simon Jennings, Stephen J Malcolm, Ruth Parker and David B Sivyer
    Citation: Geochemical Transactions 2001 2:112
  29. We report electrochemical profiles from unvegetated surficial sediments of a Georgia salt marsh. In creek bank sediments, the absence of ΣH2S or FeSaq and the presence of Fe(III)–organic complexes suggest that Mn...

    Authors: David C Bull and Martial Taillefert
    Citation: Geochemical Transactions 2001 2:104

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