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Ore metals through geologic history.

C Meyer

    Science (New York, N.Y.)
    |March 22, 1985
    PubMed
    Summary
    This summary is machine-generated.

    Ore formation varies across geologic time, influenced by Earth's tectonic history and biomass. Photosynthesis-driven oxygen and carbon significantly impact metal selection during ore genesis.

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    Area of Science:

    • Geochemistry
    • Economic Geology
    • Biogeochemistry

    Background:

    • Ore deposits of various metals exhibit distinct distributions throughout geologic time.
    • Specific time intervals for certain ore formations are linked to Earth's evolving tectonic history and surface chemistry.

    Purpose of the Study:

    • To explore the relationship between Earth's geological evolution, biomass, and the temporal distribution of ore deposits.
    • To understand the role of photosynthetic processes in shaping redox conditions and influencing metal ore formation.

    Main Methods:

    • Analysis of geologic time distribution of key ore-forming elements (chromite, nickel, copper, zinc, iron, titanium, lead, uranium, gold, silver, molybdenum, tungsten, tin).
    • Correlation of ore distribution with Earth's tectonic history and changes in surface chemistry.

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  • Investigation of the impact of biomass, particularly photosynthetic oxygen and carbon generation, on redox potentials in ore-forming processes.

    • Main Results:

    • Chromite, nickel, copper, and zinc ores are widely distributed across geologic time.
    • Iron, titanium, lead, uranium, gold, silver, molybdenum, tungsten, and tin ores show more restricted temporal occurrences.
    • Photosynthesis-driven oxygen and carbon significantly increase redox potential diversity, influencing metal selection in sedimentary and igneous ore formation.

    Conclusions:

    • Earth's tectonic evolution and biomass significantly control the temporal availability of specific metal ores.
    • The rise of oxygen and carbon through photosynthesis fundamentally altered geochemical processes, enabling diverse ore formation pathways.
    • Understanding these interactions is crucial for predicting the location and timing of economically significant mineral deposits.