Potassium argon dating principles techniques and applications to geochronology

20 Jul

Two argon loss models (episodic loss and continuous loss) are tested in an attempt to explain why these altered rocks have about half the Ar required by the conventional Rb-Sr interpretation.Both argon loss models, although attempting to maintain the assumptions of conventional geochronology, fail to explain the data, especially the new data we offer.

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The five major physical methods of rock and mineral age determinations currently in use, are described.

For more than 20 years it has been known that the Rb-Sr and K-Ar systems give discordant "ages" for Cardenas Basalt and associated Proterozoic diabase sills and dikes of Grand Canyon.

All flows possess vesicular tops and bottoms and massive to columnar-jointed central portions.

Typically this lower member is poorly exposed, weathering to spheroidal masses surrounded by granular debris.