THE STATUS AND PROBLEMS OF THE STUDY OF PHYSICAL PROPERTIES OF ROCKS AT HIGH PRESSURES AND TEMPERATURES

Abstract

The present knowledge of the relations between physical, chemical, and petrographic properties of rocks, especially at high temperatures and pressures, is inadequate. Systematic and coordinated studies of these properties are needed to better evaluate geophysical, geochemical, and petrographic data. Some studies contain considerable data on the physical properties of rocks but contain little if any chemical or petrographic data on the rocks involved. Other studies contain much chemical and petrographic data, but little on physical properties. Sampling has not been systematic and often little attention is given to geologic conditions where the samples are collected. Often, detailed studies are made on geologically uncommon rocks while the common types are ignored. If the relations between the physical, chemical, and petrographic properties of rocks were better known and understood, we would have a much better chance of resolving the complex problems of the structure and composition of the earth. Data is es...