The concept of model-temperature in oxygen isotope geochemistry: An example of a single outcrop from the Rayner Complex (Enderby Land, East Antarctica)

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

1

Scientific paper

Oxygen isotope distribution among rocks of different lithologies from one outcrop of the polymetamorphic Rayner Complex (East Antarctica) was used to estimate the "model temperatures" ( T m ), which correspond to the change of fluid behavior from the large-scale migration to small-scale exchange (open-system vs. closed-system) during waning stages of regional metamorphism T m are deduced assuming 1. (1) isotopically homogeneous fluid before isolation of a sample-scale system from its surroundings and 2. (2) mass-balance control of the fluid isotopic composition after the isolation. An estimated T m of about 720°C fits data on cationic geothermometers and equals the peak conditions of the "Major Rayner" event. Conventional oxygen geothermometry, applied to the same samples, gives equilibrium temperatures that are generally lower (down to 565°C), though the local-scale oxygen transport among minerals mostly caused disequilibrium in isotope distribution.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The concept of model-temperature in oxygen isotope geochemistry: An example of a single outcrop from the Rayner Complex (Enderby Land, East Antarctica) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The concept of model-temperature in oxygen isotope geochemistry: An example of a single outcrop from the Rayner Complex (Enderby Land, East Antarctica), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The concept of model-temperature in oxygen isotope geochemistry: An example of a single outcrop from the Rayner Complex (Enderby Land, East Antarctica) will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1070922

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.