Chemical Evolution of the Early Precambrian

Chemical Evolution of the Early Precambrian

1st Edition - January 1, 1977

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  • Editor: Cyril Ponnamperuma
  • eBook ISBN: 9781483269771

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Chemical Evolution of the Early Precambrian is a collection of papers presented at the Second College Park Colloquium on Chemical Evolution, held at the University of Maryland in October 1975. The book presents the discussions on the processes that led to the beginning of life on earth based on information gathered from the study of the Early Precambrian period. Topics on the origin of the atmosphere; early Precambrian weathering and sedimentation; carbon contents of early Precambrian rocks; and the establishment of the earliest date in the Precambrian period at which unambiguous living forms existed are expounded in the text. Geologists, biologists, chemists, paleobiologists, and students will find the book insightful and interesting.

Table of Contents

  • Contents

    List of Contributors


    1 Origin of the Atmosphere: History of the Release of Volatiles from the Solid Earth

    I. Introduction

    II. Secondary Origin of the Atmosphere

    III. Evidence for Early Degassing

    IV. Evidence for Continuing Release of Volatiles from the Upper Mantle

    V. Degassing and Recycling

    VI. Conclusion

    2 Early Precambrian Weathering and Sedimentation: An Impressionistic View

    I. Temperatures of the Early Precambrian

    II. Weathering at 4.3 Billion Years before the Present

    III. Sedimentation at 4.3 Billion Years before the Present

    3 Very Old ( > 100 Million Years) Rocks in North America

    4 Three Arguments for Continual Evolution of Sial throughout Geologic Time

    I. Introduction

    II. Proterozoic Shields

    III. Phanerozoic Continental Growth

    IV. Composition of Graywackes

    5 Archean Geology and Evidence of Ancient Life in the Slave Structural Province, Canada

    I. Yellowknife-Hearne Lake Area

    II. Nature of the Archean Crust in the Slave Province

    III. The Extent of the Archean Record in the Slave Province

    IV. Evidence of Ancient Life in the Archean of the Slave Province

    6 Carbon Contents of Early Precambrian Rocks

    7 Condensed Phosphates from Abiotic Systems in Nature

    I. Introduction

    II. The Formation of Condensed Phosphates

    III. Examples of the Formation of Condensed Phosphates

    IV. The Preparation of P4Oi0

    V. The Removal of M2 0 from Orthophosphate

    VI. The Removal of Water of Constitution

    VII. Oxygen Substitution Reaction

    VIII. The Decomposition of Salts of Lower Oxides

    IX. Condensed Phosphate Minerals

    X. Conclusion

    8 Hydrocarbons and Fatty Acids in Oil Shale of Permian Irati Formation, Brazil

    I. Introduction

    II. Experimental

    III. Results

    IV. Discussion

    9 The Stable Isotopes of Hydrogen in Precambrian Organic Matter

    I. Introduction

    II. Experimental

    III. Discussion

    10 Evolution of the Terrestrial Oxygen Budget

    I. Introduction

    II. Geochemical Carbon Cycle and Terrestrial Oxygen Budget

    III. Terrestrial 13C Mass Balance

    IV. Stationary Sedimentary Mass and Evolution of Photosynthetic Oxygen

    V. Paleoenvironmental Implications of the Model

    11 Evidences of Archean Life

    I. Chemical Evidence

    II. Morphological Evidence

    12 Earliest Evidence of Fossil Eucaryotes

    13 Paleobiology of Stromatolites

    I. Introduction

    II. The Stromatolites

    III. Stromatolite Biostratigraphy

    IV. Paleobiology of Stromatolites

    V. Gunflint Stromatolites

    VI. Conclusions

    14 Natural Mechanisms of Protection of a Blue-Green Alga against Ultraviolet Light

    I. Introduction

    II. Materials and Methods

    15 Kakabekia, a Review of Its Physiological and Environmental Features and Their Relation to Its Possible Ancient Affinities

    I. Material and Methods

    II. Results and Discussion

    16 A Discussion of Biogenicity Criteria in a Geological Context with Examples from a Very Old Greenstone Belt, a Late Precambrian Deformed Zone, and Tectonized Phanerozoic Rocks

    17 Synthetic Organic Microstructures as Model Systems for Early Protobionts

    I. Synthesis of Organic Microstructures

    II. Morphology by Light Microscopy

    III. Morphology by Transmission Electron Microscopy

    IV. Chemical Studies

    V. Catalytic Properties

    VI. Kinetics of Synthesis

    VII. Discussion

    18 Comparison of Laboratory Silicified Blue-Green Algae with Precambrian Microorganisms

    19 Eoastrion and the Metallogenium Problem

    20 Evolution of Mitosis and the Late Appearance of Metazoa, Metaphyta, and Fungi

    21 Iron-Sulfur Proteins and Superoxide Dismutases in the Evolution of Photosynthetic Bacteria and Algae

    I. The Iron-Sulfur Proteins

    II. Superoxide Dismutases

    22 Low Oxygen Levels and the Pabnitoyl CoA Desaturase of Yeast: Relation to Primitive Biological Evolution

    Subject Index

Product details

  • No. of pages: 234
  • Language: English
  • Copyright: © Academic Press 1977
  • Published: January 1, 1977
  • Imprint: Academic Press
  • eBook ISBN: 9781483269771

About the Editor

Cyril Ponnamperuma

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