Computer Science
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010e%26psl.293...63p&link_type=abstract
Earth and Planetary Science Letters, Volume 293, Issue 1-2, p. 63-71.
Computer Science
1
Scientific paper
Chemically zoned garnets provide a record of the changing conditions within the tectonically evolving crust where metamorphic mineral growth occurs. Recent advances in Sm-Nd geochronology of zoned garnets now permit the measurement of a higher resolution temporal record than previously attainable. Here, we present precise (< ± 0.7 million years) Sm-Nd ages from 12 concentric growth zones within a single large garnet from the Austrian Alps. Within a total growth span of 7.55 ± 0.52 (2 SD) million years, the data reveal two brief distinct pulses of accelerated growth (at least 5 times faster than the background growth rate). These pulses correlate with compositional features in the zoned garnet that are indicative of growth in the presence of abundant fluids or abrupt P-T changes. These data show that tectonometamorphic processes leading to garnet growth (such as exhumation, fluid flow, and/or heating) were pulse-like in nature, rather than slow and steady, during the waning stages of the Alpine orogeny 28-20 million years ago.
Baxter Ethan F.
Pollington Anthony D.
No associations
LandOfFree
High resolution Sm-Nd garnet geochronology reveals the uneven pace of tectonometamorphic processes 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 High resolution Sm-Nd garnet geochronology reveals the uneven pace of tectonometamorphic processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High resolution Sm-Nd garnet geochronology reveals the uneven pace of tectonometamorphic processes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1314662