Experimental studies of annealing of etched fission tracks in fluorapatite

Journal Article · Wed May 01 04:00:00 EDT 1991 · Geochimica et Cosmochimica Acta; (United States)

DOI:https://doi.org/10.1016/0016-7037(91)90320-5· OSTI ID:6140242

Crowley, K D; Cameron, M; Schaefer, R L ^[1]

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1. Miami Univ., Oxford, OH (United States)

The authors have investigated the effects of anion (F, Cl, OH) and cation (Sr) substitutions in apatite on track annealing in a series of about 300 isothermal experiments. This paper presents annealing data for two samples of fluorapatite, the most common variety of apatite in nature. The samples studied include a near-endmember fluorapatite and a fluorapatite containing 4.4% SrO. For each of the approximately 105 experiments reported herein, the authors have measured the reduction in etched lengths of confined fission tracks in prismatic mineral sections and documented the relationship between track length and crystallographic orientation during annealing. These data are used to construct mathematical models that describe the reduction of etched length as a function of time and temperature. These models, in turn, are used to (1) provide insight into the annealing process; (2) elucidate the effects of chemistry on annealing; and (3) predict length reduction at the low temperatures and long times characteristic of geological conditions.

• OSTI ID: 6140242
• Journal Information: Geochimica et Cosmochimica Acta; (United States), Journal Name: Geochimica et Cosmochimica Acta; (United States) Vol. 55:5; ISSN GCACA; ISSN 0016-7037
• Country of Publication: United States
• Language: English

Related Subjects

58 GEOSCIENCES
580000* -- Geosciences
ACTIVATION ENERGY
AGE ESTIMATION
ANNEALING
APATITES
BENCH-SCALE EXPERIMENTS
CHEMISTRY
DATA
DATA COMPILATION
ENERGY
FISSION TRACKS
GEOCHEMISTRY
HEAT TREATMENTS
INFORMATION
MATHEMATICAL MODELS
MINERALS
PARTICLE TRACKS
PHOSPHATE MINERALS
RECRYSTALLIZATION