Chondrite thermal histories constrained by experimental annealing of Quenggouk orthopyroxene

Details Chondrite thermal histories constrained by experimental annealing of Quenggouk orthopyroxene Chondrite thermal histories constrained by experimental annealing of Quenggouk orthopyroxene

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984natur.308..259a&link_type=abstract

Nature (ISSN 0028-0836), vol. 308, March 15, 1984, p. 259-261. Research supported by the Natural Environment Research Council.

Mathematics

Logic

29

Annealing, Chondrites, Evolution (Development), Meteoritic Composition, Pyroxenes, Temperature Gradients, Electron Microscopy, Metamorphism (Geology), Mineralogy, Meteorites, Chondrites, Thermal Properties, History, Texture, Minerals, Experiments, Annealing, Orthopyroxene, Quenggouk, Samples, Meteorite, Thermal Effects, Ordinary Chondrites, Formation, Parent Bodies, Origin, Composition, Cooling, Metamorphism, Silicate, Temperature, Hypotheses

Scientific paper

Attention is given to the series of ordinary chondrite petrological types, numbered 3-6, which exhibit increasingly homogeneous minerals and annealed textures. While the annealing is usually interpreted as due to reheating after cold accretion of the parent bodies, evidence has been adduced for texture and mineral composition origins during primary cooling. The first constraint on chondrite 'matamorphic' history is presently derived from experimental annealing of a silicate mineral in natural meteoric specimens. Striated orthopyroxene was almost entirely converted to its normal form in 1 week at about 800 C, without detectable change of composition. These results support the primary cooling hypothesis.

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