Primitive material surviving in chondrites: matrix.
Abstract
A logical place to search for surviving pristine nebular material is in the fine-grained matrices of ordinary and carbonaceous chondrites of petrographic type 3. Unfortunately, many of these chondrites have experienced brecciation, thermal metamorphism and aqueous alteration so that interpreting individual features in terms of specific nebular conditions and/or processes is difficult. It follows that the origin and evolutionary history of such matrix phases are controversial and a consensus is difficult to define. After summarizing the salient mineralogical, petrographic, chemical and isotopic features of matrix in apparently primitive chondrites, the authors provide an overview of areas of agreement and of topics that are currently in dispute.
- Publication:
-
Meteorites and the Early Solar System
- Pub Date:
- 1988
- Bibcode:
- 1988mess.book..718S
- Keywords:
-
- Chondrites;
- Meteoritic Composition;
- Nebulae;
- Solar System;
- Mineralogy;
- Olivine;
- Oxygen Isotopes;
- Petrology;
- Pyroxenes;
- Lunar and Planetary Exploration;
- Chondrites: Solar Nebula;
- Chondrites: Mineralogy;
- Chondrites: Petrology;
- Chondrites: Chemical Composition