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Activity

2007

• MULTIPLE SULPHUR SOURCES FOR ARCHAEAN KOMATIITE-HOSTED NICKEL SULFIDES CONFIRMED BY S AND FE ISOTOPES: EXPLORATION IMPLICATIONS
  T132 Magmatic Nickel Sulfide Deposits: Geology, Geochemistry, and Genesis
  Tuesday, 30 October 2007

  8:00 AM - 12:00 PM
• EVALUATING THE NATURE OF THE RISE OF ATMOSPHERIC OXYGEN USING LEAD ISOTOPE COMPOSITIONS FROM PALEOPROTEROZOIC SHALE SUITES
  T126 Perspectives in Redox Geochemistry and Microbial Processes
  Tuesday, 30 October 2007

  8:00 AM - 12:00 PM
• RE-OS DATING OF C-RICH SLATE FROM THE WESTERN WAWA SUBPROVINCE, MINNESOTA
  T100 Metallogeny and Isotope Geochemistry—New Approaches, New Perceptions, New Paradigms
  Monday, 29 October 2007

  1:30 PM - 5:30 PM

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2006

• ABRUPT RISE IN PALEOPROTEROZOIC O2 AND GLOBAL MICROBIAL SULFATE REDUCTION
  158 Links Between Geological Processes, Microbial Activities, and Evolution of Life
  Tuesday, 24 October 2006

  1:30 PM - 5:30 PM
• RISE IN SEAWATER SULFATE CONTENT DURING THE LOMAGUNDI (CA. 2.22-2.1 GA) CARBON ISOTOPE EXCURSION
  T46 Changes in Ocean and Atmospheric Redox State and the Evolution of Life II
  Sunday, 22 October 2006

  1:30 PM - 5:30 PM
• GEOCHEMICAL EVIDENCE FOR THE RESTRICTION OF OXIC DEPOSITIONAL ENVIRONMENTS IN THE PROTEROZOIC OCEAN
  T46 Changes in Ocean and Atmospheric Redox State and the Evolution of Life II
  Sunday, 22 October 2006

  1:30 PM - 5:30 PM
• OXYGEN ISOTOPE COMPOSITION OF CARBONATE-ASSOCIATED SULFATE AND THE SOURCES AND CYCLING OF SULFATE IN THE EARLY OCEAN
  T46 Changes in Ocean and Atmospheric Redox State and the Evolution of Life II
  Sunday, 22 October 2006

  1:30 PM - 5:30 PM
• LEAD ISOTOPES IN CA. 2.32 GA SHALES, SOUTH AFRICA: EVIDENCE FOR OXIDATIVE CONTINENTAL CRUST WEATHERING
  16 New Views on Old Rocks: Insights on Biospheric Evolution from the Precambrian Sedimentary Record
  Thursday, 23 March 2006

  1:30 PM - 3:45 PM

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2005

• SUBOXIC DEEP SEAWATER AT CA. 1.74 GA: EVIDENCE FROM SEAFLOOR-HYDROTHERMAL JASPER AND IRON-FORMATION IN THE JEROME DISTRICT, ARIZONA
  T103 The Evolving Earth: Implications for Ore Deposit Formation, Evolution, and Benefaction
  Monday, 17 October 2005

  1:30 PM - 5:30 PM
• INVITED: CORRELATION OF PALEOPROTEROZOIC GLACIAL DEPOSITS: EVIDENCE FOR THREE GLOBAL GLACIATIONS BETWEEN 2.4 AND 2.22 GA
  49 Proterozoic Oceans, Atmospheres, and Life
  Thursday, 11 August 2005

  1:30 PM - 4:30 PM
• TRACE METALS IN PRECAMBRIAN BLACK SHALES AND THE EVOLVING REDOX STATE OF THE EARLY OCEAN
  45 Marine Anoxia over Geologic Time—Where, When, Why, and Cause and Effect Relationships to the Evolving Biosphere III
  Thursday, 11 August 2005

  9:00 AM - 12:00 PM
• THE LATE ARCHEAN TO EARLY PALEOPROTEROZOIC EARTH SYSTEM AND THE RISE OF ATMOSPHERIC OXYGEN
  11 Oxygen and Evolution on Early Earth I
  Tuesday, 9 August 2005

  9:00 AM - 12:00 PM

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2004

• CHEMOSTRATIGRAPHY OF EARLY PALEOPROTEROZOIC CARBONATES OF SOUTH AFRICA
  T142 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Tuesday, 9 November 2004

  8:00 AM - 12:00 PM
• GEOCHRONOLOGIC AND GEOCHEMICAL CONSTRAINTS ON THE AGE OF THE JHAMARKOTRA CARBONATES FROM THE ARAVALLI SUPERGROUP, NORTHWESTERN INDIA
  T142 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Tuesday, 9 November 2004

  8:00 AM - 12:00 PM
• SEDIMENTARY AND ISOTOPIC CHARACTERIZATION OF THE PALEOPROTEROZOIC GLACIAL INTERVAL
  T142 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Tuesday, 9 November 2004

  8:00 AM - 12:00 PM
• ATMOSPHERIC CHEMISTRY OF SO2 DURING THE EARLIEST HURONIAN GLACIATION
  T142 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Tuesday, 9 November 2004

  8:00 AM - 12:00 PM
• CHONDRITIC 187OS/188OS IN LATE ARCHEAN – EARLY PALEOPROTEROZOIC SEAWATER INDICATES LOW RIVERINE FLUX OF OS UNDER ANOXIC WEATHERING CONDITIONS
  T142 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Tuesday, 9 November 2004

  8:00 AM - 12:00 PM
• LINKED HYDROSPHERIC AND ATMOSPHERIC CHANGES ATTENDING PROTRACTED BREAKUP OF THE LATE ARCHEAN SUPERCONTINENT
  105 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Monday, 8 November 2004

  1:30 PM - 5:30 PM
• RISES AND FALLS OF THE ATMOSPHERIC OXYGEN IN EARLY PALEOPROTEROZOIC
  105 Early Paleoproterozoic (2.5–2.0 Ga) Events and Rates: Bridging Field Studies and Models
  Monday, 8 November 2004

  1:30 PM - 5:30 PM