The History Of Earth's Early Atmosphere, Hydrosphere, And Biosphere, From Hadean Through Proterozoic Time, Is One Of Geology's Enduring Puzzles. Ore Deposits Provide Important Insights Into This History Because They Contain Elements And Minerals That Are Highly Sensitive To The Geochemical Environment In Which They Form. Just What These Minerals Tell Us Remains A Matter Of Considerable Debate, However. When And How Did Life Develop, An Oxygen-rich Atmosphere Form, And Sulfate Dominate The Ocean? This Volume Contains Reports On These Questions From Both Sides Of The Aisle For Iron And Manganese Formations, Uranium Paleoplacers And Hydrothermal Deposits, And Exhalative Sulfides And Oxides.--publisher's Website. Onset And Early Evolution Of Life / M.j. Russell And A.j. Hall -- Early Life Signatures In Sulfur And Carbon Isotopes From Isua, Barberton, Wabigoon (steep Rock) And Belingwe Greenstone Belts (3.8 To 2.7 Ga.) / N.v. Grassineau -- Fingerprinting The Metal Endowment Of Early Continental Crust To Test For Secular Changes In Global Mineralization / C. Thiart And M.j. De Wit -- Discovery Of The Oldest Oxidized Granitoids In The Kaapvaal Craton And Its Implications For The Redox Evolution Of Early Earth / S. Ishihara, H. Ohmoto, C.r. Anhaeusser, A. Imai, And L.j. Robb -- Secular Variations Of N-isotopes In Terrestrial Reservoirs And Ore Deposits / R. Kerrich, Y. Jia, C. Manikyamba, And S.m. Naqvi -- Sedimentary Setting Of Witwatersrand Placer Mineral Deposits In An Archean Atmosphere / W.e.l. Minter -- Witwatersrand Gold-pyrite-uranitite Deposits Do Not Support A Reducing Archean Atmosphere / J. Law And N. Phillips -- Evidence From Sulfur Isotope And Trace Elements In Pyrites For Their Multiple Post-depositional Processes In Uranium Ores At The Stanleigh Mine, Elliot Lake, Ontario, Canada / K.e. Yamaguchi And H. Ohmoto -- Time Constraint For The Occurrence Of Uranium Deposits And Natural Nuclear Fission Reactors In The Paleoproterozoic Franceville Basin (gabon) / F. Gauthier-lafaye -- Proterozoic Sedimentary Exhalative (sedex) Deposits And Links To Evolving Global Ocean Chemistry / T.w. Lyons -- Precambrian Mississippi Valley-type Deposits / S.e. Kesler And M.h. Reich -- Superheavy S. Isotopes From Glacier-associated Sediments Of The Neoproterozoic Of South China / Liu Tie-bing, J.b. Maynard, And J. Alten -- Evaluation Of Diagenetic Recycling As A Source Of Iron For Banded Iron Formations / R. Raiswell -- Microbially Mediated Iron Mobilization And Deposition In Iron Formations Since The Early Precambrian / D.a. Brown -- Oxygen Isotope Composition Of Hematite And Genesis Of High-grade Bif-hosted Iron Ores / J. Gutzmer -- Rare-earth Elements In Precambrian Banded Iron Formations / Y. Kato, K.e. Yamaguchi, And H. Ohmoto -- Chemical And Biological Evolution Of Early Earth / H. Ohmoto, Y. Watanabe, K.e. Yamaguchi, H. Naraoka, M. Haruna, T. Kakegawa, K. Hayashi, And Y. Kato. Edited By Stephen E. Kesler, Hiroshi Ohmoto. Includes Bibliographical References And Index.