61. MESSENGER Web Site The official site for the MErcury Surface, Space ENvironment, geochemistry, and Ranging mission. Includes details of mission and spacecraft design, http://messenger.jhuapl.edu/

A NASA Discovery mission to conduct the first orbital study of the innermost planet Why Mercury? The Mission Gallery Education ... Contacts Mission Elapsed Time August 3, 2004 DAYS HRS MINS SECS DAYS HRS MINS SECS Time since Closest Approach Mercury Orbit Insertion March 18, 2011 DAYS HRS MINS SECS Countdown to Insertion Burn Current Total Distance Traveled miles approx. Mission News January 24, 2008 Counting Mercury’s Craters MESSENGER team members have been identifying and measuring the impact craters on portions of Mercury that had not been previously seen by spacecraft. By counting craters on different areas of the planet’s surface, a relative geologic history of the planet can be constructed, indicating which surfaces formed first and which formed later. In this image , 763 craters have been identified and measured (shown in green) along with 189 hills (shown in yellow). [ more Featured Image January 24, 2008 Counting Mercury's Craters more

62. GEOCHEMISTRY OF ARSENIC Finally, geochemical data (including the speciation data) and information from existing interpretive reports are used to construct preliminary hypotheses http://or.water.usgs.gov/pubs_dir/Html/WRIR98-4205/as_report6.html

Arsenic in Ground Water of the Willamette Basin, Oregon GEOCHEMISTRY OF ARSENIC Sources of Arsenic Review of Geochemical Processes Controlling Arsenic Mobility Two categories of processes largely control arsenic mobility in aquifers: (1) adsorption and desorption reactions and (2) solid-phase precipitation and dissolution reactions. Attachment of arsenic to an iron oxide surface is an example of an adsorption reaction. The reverse of this reaction, arsenic becoming detached from such a surface, is an example of desorption. Solid-phase precipitation is the formation of a solid phase from components present in aqueous solution. Precipitation of the mineral calcite, from calcium and carbonate present in ground water, is an example of solid-phase precipitation. Dissolution of volcanic glass within an aquifer is an example of solid-phase dissolution. Arsenic adsorption and desorption reactions are influenced by changes in pH, occurrence of redox (reduction/oxidation) reactions, presence of competing anions, and solid-phase structural changes at the atomic level. Solid-phase precipitation and dissolution reactions are controlled by solution chemistry, including pH, redox state, and chemical composition. Adsorption and Desorption Processes Arsenic is a redox-sensitive element. This means that arsenic may gain or lose electrons in redox reactions. As a result, arsenic may be present in a variety of redox states. Arsenate and arsenite are the two forms of arsenic commonly found in ground water (Masscheleyn and others, 1991). Arsenate generally predominates under oxidizing conditions. Arsenite predominates when conditions become sufficiently reducing. Under the pH conditions of most ground water, arsenate is present as the negatively charged oxyanions H2AsO4- or HAsO42-, whereas arsenite is present as the uncharged species H3AsO30 (Hem, 1985). The strength of adsorption and desorption reactions between these different arsenic species and solid-phase surfaces in aquifers varies, in part, because of these differences in charge. Differences in species charge affect the character of electrostatic interactions between species and surfaces.

63. Institute Of Geology & Geochemistry Of Combustible Minerals, Lviv, Ukraine Scientific research center of investigation of the broad range of combustible minerals and related geological phenomena. http://www.geofuel.lviv.net/

64. 2008 Geochemistry Archive Nature Geoscience geochemistry from. 2008 geochemistry January 2008 geochemistry. Top of page. January 2008 geochemistry. Asteroid breakup linked to the Great Ordovician http://www.nature.com/ngeo/archive/ngeo_s5_current_archive.html

65. Institute For Environmental Geochemistry RuprechtKarls-Universität Heidelberg Startseite der Universität Anschriften und Telefonnummern English http://www.uni-heidelberg.de/institute/fak12/ugc/

66. USNews.com: America's Best Graduate Schools 2008: Earth Sciences: Geochemistry Earth Sciences Specialties geochemistry Ranked in 2006*. 1. California Institute of Technology. 2. Pennsylvania State University–University Park http://grad-schools.usnews.rankingsandreviews.com/usnews/edu/grad/rankings/phdsc

advertisement @import url(/usnews/v3/css/v3_oldpages.css); Thursday, January 24, 2008 Subscribe Contact Us Search U.S. News Health Education Opinion Science ... Rankings MM_preloadImages('/usnews/images/edu/rankings/2007/grad/free/over/buy.gif'); MM_preloadImages('/usnews/images/edu/rankings/2007/grad/free/over/learnmore.gif'); MM_preloadImages('/usnews/images/edu/rankings/2007/grad/free/over/articles.gif'); MM_preloadImages('/usnews/images/edu/rankings/2007/grad/free/over/tools.gif'); MM_preloadImages('/usnews/images/edu/rankings/2007/grad/free/over/bestgrad.gif'); Log In Help About the Rankings Earth Sciences Specialties: Geochemistry Ranked in 2006 California Institute of Technology Get our expanded directory featuring graduates' career prospects, starting-salary statistics, admissions details, information on cost and financial aid, graphs and charts on key school attributes, plus much, much more. America's Best Graduate Schools 2008 Premium Online Edition Premium Online Edition Print Edition Combo Package Already have the Premium Online Edition? Log in here *This ranking was computed in January of the year cited, based on data from a survey sent out in the fall of the previous year.

67. Geochemistry, Links For Mineralogists geochemistry, Annotated links to internet resources, especially for mineralogists, petrologists, crystallographers,geologists. http://www.mineralogie.uni-wuerzburg.de/links/geochem/geochem.html

Home Geochemistry Geochemistry Categories Selected Geochemistry Websites On-line Geochemical Data Periodic Tables Introductions to Geochemistry@ ... Geochemistry Selected Geochemistry Websites Categories On-line Geochemical Data Periodic Tables Introductions to Geochemistry@ Introductions to Isotope Geochemistry, Spectroscopy and Spectronomy@ ... Definitions Database@ Selected Geochemistry Websites About.com Chemistry Ahmadi Geological Consultancy Geochemistry.com . A directory of businesses, university departments, associations, museums, etc. American Geophysical Union (AGU). AGU is a worldwide scientific community that advances, through unselfish cooperation in research, the understanding of Earth and space for the benefit of humanity. Go to: Volcanology, Geochemistry, and Petrology Section Association of Exploration Geochemists (AEG). The AEG is an international organisation specialising in the field of exploration and applied geochemistry. Georges Beaudoin Therrien Stable Isotope Fractionation Calculator (SIFC) . This online tool (periodically revised) comprises a non-exhaustive compilation of equations from literature. BioTech , Indiana University, University of Texas, Austin: An illustrated Dictionary . BioTech is a high level dictionary for college students and professionals, a hybrid biology/chemistry educational resource and research tool on the World Wide Web. Offers good graphics of bio-molecules.

68. AquaChem, Geochemistry, Geochemistry Software, Groundwater And Geochemistry Groundwater chemistry and water geochemistry software for aqueous geochemical data analysis. Product overview, pricing, and online ordering. http://www.ssgintl.com/

Scientific Software Group Phone 801.208.3011 or Toll Free (U.S.) 1.866.620.9214 Fax 801.302.1160 Phone: (801) 208-3011

69. Geology/Geochemistry Program At New Mexico Tech The Geology/geochemistry group at New Mexico Tech consists of nine regular faculty members and a large number of adjunct faculty. http://www.ees.nmt.edu/Geol/

Sierra Blanca Peak, New Mexico Admissions Areas of research concentration Faculty Home Pages Geologic River trips ... Geoscience links The Geology/Geochemistry group at New Mexico Tech consists of nine regular faculty members and a large number of adjunct faculty. In addition, there are numerous geologists and geochemists at the New Mexico Bureau of Geology and Mineral Resources , which is located on campus. Many of these scientists actively participate in the supervision of graduate and undergraduate student projects. Home Geology Geochemistry Hydrology ... Search Last Updated: August 27, 2007 by Webmaster Department of Earth and Environmental Science, 801 Leroy Place, Socorro, New Mexico 87801 Phone (505) 835-5634; Email geos@nmt.edu

70. Geochemistry And Geophysics, USGS-ERP The USGS Organic geochemistry Laboratory researches chemical and geological data to develop an understanding of the physical and chemical processes of http://energy.usgs.gov/gg.html

This page requires javascript enabled functionality USGS Home Contact USGS Search USGS Energy Resources Program Geochemistry and Geophysics Energy Home About Energy Contact Energy How Are We Doing? ... Energy Quick links below Geochemistry Research Geochemistry Laboratories Geophysical and Seismic Processing ... ENERGY PROGRAM NEWSLETTER CONTACT For Energy Program Inquiries Email: Energy Program Office Geochemistry and Geophysics The USGS Organic Geochemistry Laboratory researches chemical and geological data to develop an understanding of the physical and chemical processes of hydrocarbon generation, migration and accumulation. The Geophysical Processing Group performs specialized 2-D and 3-D seismic reflection data processing and interpretation using state of the art hardware and software for the Energy Resources Program and other clients upon request. The Group maintains the National Energy Research Seismic Library (NERSL) and have been acquiring seismic reflection data since the mid 1970's. Geochemistry and Geophysics SPOTLIGHT Implementation Plan for the National Geological and Geophysical Data Preservation Program

71. The Society Of Environmental Geochemistry And Health understanding the interaction between the geochemical environment and the health of plants, animals and humans. SEGH recognizes the importance of http://www.segh.net/

Society of Environmental Geochemistry and Health Menu Home Organizational Profile Newsletter Journal ... Contact SEGH Info SEGH was established in 1971 to provide a forum for scientists from various disciplines to work together in understanding the interaction between the geochemical environment and the health of plants, animals, and humans. SEGH recognizes the importance of interdisciplinary research. SEGH members represent expertise in a diverse range of scientific fields, such as biology, engineering, geology, hydrology, epidemiology, chemistry, medicine, nutrition, and toxicology. SEGH members represent these areas of expertise within the academic, regulatory, and industrial communities, thus providing a representative perspective on current issues and concerns. SEGH membership is international and there are regional sections to coordinate activities in Europe and the Asia/ Pacific. SEGH Home Organizational Profile Newsletter Journal ... Contact

72. Environmental Geochemistry The purpose of this course is to provide a practical background in basic geochemical principles that can be applied to environmental problems. http://www.ronstoessell.org/environmental_geochemistry.htm

Back to Ron's home page Link To Environmental Geochemistry Topics Environmental Geochemistry Geology 4658 or Geology 6097; Fall 2005 Class time: 4:45 PM - 6 PM on Monday and Wednesday. The web notes serve as a text. As a backup text, try Environmental Chemistry (latest edition) by Stanley Manahan Instructor: Ronald K. Stoessell, Room 1034, 280-6795, rstoesse@uno.edu or ronlondi@charter.net 50% of the grade will be from 2 tests (midterm and final) and the remaining 50% will be from the homework assignments. The midterm and the final will be take-home tests. Graduate students will have to learn how to use MINTEQA2 and for their final homework assignment, pick a pollutant metal use the program to study the metal mobility in aqueous solutions as a function of pH and pe conditions. Undergraduates can do this final assignment for extra points. The purpose of this course is to provide a practical background in basic geochemical principles that can be applied to environmental problems. These same principles can also be applied to geologic problems at other than earth-surface conditions. In general, at higher temperatures and pressures, much of the necessary geochemical data needed to apply the geochemical principles is not tabulated and has to be calculated. This is covered in another course Geology 4659 (Geochemical Thermodynamics). The course will make use of computer programs to solve geochemical problems and the use of EXCEL spreadsheets to do simple modeling of pollutant transport. Some simple chemical analyses will be done to illustrate important environmental chemical reactions, e.g., pH, Eh, dissolved O

73. Geochemistry geochemistry research at the Geological Survey of Canada. http://gsc.nrcan.gc.ca/geochem/index_e.php

@import url(../_sys/css/base2.css); Natural Resources Canada www.nrcan.gc.ca Skip to content Skip to institutional links Common menu bar links Home Contact us Help Search ... Geological Survey of Canada Geochemistry Institutional links Site map Contact us Help Geochemistry Home Geochemical data National geochemical reconnaissance Geochemical modelling Miscellaneous reports Timmins, ON Central British Columbia Flin Flon, MB Metal mobility in lake sediments ... Environmental geochemistry and geochemical hazards Related links Metals in the environment Geochemistry (GSC Calgary) Geological Survey of Canada Geological Survey of Canada Geochemistry Geochemical data National geochemical reconnaissance Geochemical modeling Geochemical modeling will expand our knowledge of soil mineralogy by developing new approaches for mineralogical analyses. These will help define mineralogical controls on geochemical background variation, and the apportionment of trace elements among minerals and sample media. Miscellaneous reports Geochemistry of till and humus in the Timmins-Kamiskotia area, northeastern Ontario (NTS 42A/11, 12, 13, 14) In the summers of 1995 and 1996, the Geological Survey of Canada carried out Quaternary geological mapping and regional till and humus sampling in the Timmins-Kamiskotia area to determine geochemical backgrounds and identify patterns related to different bedrock lithologies and geochemical anomalies related to bedrock mineralization. Mercury concentrations in till, central British Columbia

74. Gordon Research Conferences - 2008 Program (Organic Geochemistry) The 2008 conference will highlight the cutting edge in organic geochemistry in both biogeochemical and energyrelated scholarship. The meeting will focus on http://www.grc.org/programs.aspx?year=2008&program=orggeo

75. IngentaConnect Publication: Geochemistry: Exploration, Environment, Analysis Copublished with the Association of Applied Geochemists, geochemistry Exploration, Environment, Analysis covers the latest developments in exploration and http://www.ingentaconnect.com/content/geol/geea

var tcdacmd="dt"; Home About Ingenta Ingenta Labs Ingenta Blog ... Check our FAQs Or contact us to report problems with: Subscription access Article delivery Registration Library administrator tasks ... Other problems For Publishers Why go online? Why choose IngentaConnect? Beyond Print: enhancing your service Access and authentication ... Contact us For Researchers For Authors About IngentaConnect Search and browse Publications available ... Register For Librarians Resource Zone Why choose IngentaConnect? Why choose IngentaConnect Complete? Activating Subscriptions ... Register CM8ShowAd("HorizontalBanner"); Geochemistry: Exploration, Environment, Analysis ISSN 1467-7873 visit publication homepage Co-published with the Association of Applied Geochemists, Geochemistry: Exploration, Environment, Analysis covers the latest developments in exploration and environmental geochemistry and will be of interest to practising geochemists in industry, professional geologists, environmental geochemists, and geoscientists in academia and government. GEEA covers the geochemistry of the environment surrounding mineral deposits and mines. It is available in hard and electronic copy.

76. GCXPLORE - Exploration Geochemistry - Richard Carver 30 Years of exploration geochemical experience. Available to consult for short or long periods. Main experience in Australia Africa SE Asia and China. http://www.gcxplore.com/

GC XPLORE GEOCHEMICAL EXPLORATION CONSULTANTS EXPERIENCE SERVICES LINKS HOME GC Xplore Pty Ltd ACN 0099061140 Richard Carver 67 Chelmsford Road Mt Lawley W. Australia PHONE 61 8 92279905 MOBILE 61 405426960 Email Contact

77. Petroleum And Environmental Geochemistry Group, School Of Earth, Ocean And Envir It was set up by Steve Rowland in 1989, to coordinate and identify the interests of those in Plymouth involved in the general area of organic geochemistry http://www.research.plymouth.ac.uk/pegg/

document.write("Included JavaScript file not found"); Petroleum and Environmental Geochemistry Group School of Earth, Ocean and Environmental Sciences, University of Plymouth Home The Group Research News The Group housed in the School of Earth, Ocean and Environmental Sciences , University of Plymouth is also part of the Centre for Chemical Sciences . It was set up by Steve Rowland in 1989, to coordinate and identify the interests of those in Plymouth involved in the general area of organic geochemistry research. We have strong links with national ( e.g. Brixham Environmental Laboratory ) and international laboratories (please see our detailed international page The Group is comprised of five members of academic staff (two Professors, a Senior Lecturer and two Lecturers), a Scientific Officer, two post-doctoral researchers, three Ph.D. students (plus another two co-supervised at the Universities of Exeter and Essex) and a senior technician. The Petroleum and Environmental Geochemistry Group, October 2002. Absent from the photo are: Roger Srodzinski and Emma Smith The 19th BOGS Meeting will be hosted by the NRG, Newcastle and will take place in the summer of 2008.

78. Geochemistry | Geochemistry News, Research And Current Events Brightsurf geochemistry news and geochemistry current events, research and discoveries. http://www.brightsurf.com/search/r-a/Geochemistry/1/Geochemistry_news.html

Brightsurf Science News Latest science news and current events. RSS Top Science News Most viewed science news and current science event articles this week. RSS Add Brightsurf Science News to your Web Site Science Resources Earth Science Space Science Life Science Fields of Scientific Study ... Nanotechnology Articles Science RSS News Feeds Earth, Life and Space Science RSS News Feeds. Earth Science RSS News Space Science RSS News Life Science RSS News Fields of Scientific Study RSS ... Next Sort By: Page Views Date History book of lakes Does man, through the felling of trees, alpine farming and atmospheric metal pollution produce a more negative effect on lakes than do natural changes, such as climate and vegetation? How long does it take until environmental protection measures actually show effect in lakes? Karin Koinig from the... view more Virginia Tech geoscientists resolve inconsistent data on crystal growth, dissolution Virginia Tech Geoscientists Patricia Dove and Nizhou Han have demonstrated that crystals dissolve and grow by the same set of analogous 'reversed' mechanisms. view more Durham diamond expert reports to the White House The US Government has called in a University of Durham geologist for advice on diamonds in an effort to crack down on the illegal gems-for-arms trade. Dr Graham Pearson is one of a group of international experts and government representatives invited tot he White House Diamond Conference, convened...

79. Geotech.org - Basic Geology And Surface Geochemical Exploration On The World Wid Professional organization dedicated to the development and advancement of surface and nearsurface geochemical exploration for oil and gas. http://www.geotech.org/

dmoz.org geotech.org Home Basic Geology Surface Geochemical Exploration Contact Us for academic papers! APGE Publications The collection is housed at the [click here] SMU DeGolyer Library [click here] Recognized by the IMAGES SURVEY FAQ LITERATURE DICTIONARY of GEOLOGICAL TERMS ... CALL FOR PAPERS Special Geological Features Diamonds Gold Oil Snow Metamorphism Associated Topics SOIL-NET.COM Geological Features Rocks Volcanos Mountain Building Mohs Scale of Hardness ... Geologic Timescale Geological Dictionaries Dictionary of Geological Terms Glossary of Geochemical Terms Schlumberger Oilfield Terms OilTracers Petroleum Terms ... Glossary of Mining Terms Periodic Tables Webelements Lenntech's Online Periodic Table Table i's very complete list of Periodic Tables geotech.org's e-publications Submit Poetry Submit Articles or Academic Papers geotech.org Products pH, Electrolytic Conductivity, and ORP Suite Analysis High Resolution Soil Spectral Analysis Bacteria / Fungi Analysis UV-Vis Hydrocarbon Analysis ... Price List geotech.org Contractor List The most comprehensive list of Surface Exploration Technology Providers on the Internet. geotech.org News In Field Analysis (6/07) Hydrocarbon Detection Update (4/06) geotech.org Website Update (12/04)

80. Geochemical Society Geochemical News. President s Letter October 2007 The Geochemical Society · One Brookings Drive, CB 1169 · St. Louis, MO 631304899 · 314-935-4131. http://www.geochemsoc.org/

Contact Site Map Search Society ... Useful Links Geochemical News The Volcano Vulcano : from Hephaistos to Helgeson Book Review: RiMG v. 64 , Medical Mineralogy and Geochemistry Nick's Picks (#133) Making Geochemistry Green Featured Links Join/Renew Today! Limited time offer: Free Access to Elements on GeoScienceWorld Read recent geochemical Announcements Find or submit a job to our Job Links Start making plans for Goldschmidt 2008 Select a different background image in About This Site About This Site

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