Clay Minerals and the Origin of Life
CUP Archive, Dec 18, 1986 - Science - 193 pages
This volume is the edited proceedings of a conference seeking to clarify the possible role of clays in the origin of life on Earth. At the heart of the problem of the origin of life lie fundamental questions such as: What kind of properties is a model of a primitive living system required to exhibit and what would its most plausible chemical and molecular makeup be? Answers to these questions have traditionally been sought in terms of properties that are held to be common to all contemporary organisms. However, there are a number of different ideas both on the nature and on the evolutionary priority of 'common vital properties', notably those based on protoplasmic, biochemical and genetic theories of life. This is therefore the first area for consideration in this volume and the contributors then examine to what extent the properties of clay match those required by the substance which acted as the template for life.
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INTRODUCING CLAY A G CairnsSmith
STRUCTURES AND FORCES
CLAYS ON THE EARLY EARTH
Dysoxic environments as models for primordial
CLAYS IN THE SOLAR SYSTEM
acids activity alteration aluminium appear atmosphere bonds carbon catalysts cations cell Chapter charge chemical chemistry chondrites clay minerals common complex composition compounds concentration contain crystal crystallisation diffraction discussed domains early Earth effects electron elements energy environment evolution evolved example experiments formation functions genes genetic glauconitic growth hydrothermal hydroxide illite important increasing interesting interlayer interstratified ions iron kaolinite kind layer lead less Mars material matter mechanisms meteorites mica molecular molecules montmorillonite nature observed occur octahedral ordering organic origin oxygen particles patterns phases phenotype positions possible precipitates present probably problem properties protein question reactions replication result rocks sediments selection sequence sheet silica silicate similar smectite soil solution specific structure studies substitutions suggested surface synthesis temperatures tetrahedral theory trioctahedral types unit University X-ray