Lu–Hf Geochronology on Single Garnets in a Micaschist from the North Qilian Orogenic Belt
نویسندگان
چکیده
The acquisition of the timing and duration metamorphic mineral growth is key to understanding evolution belts. Garnet Lu–Hf geochronology becoming increasingly powerful in this aspect. It believed that garnet radiometric systems are preserved during low-temperature metamorphism. However, hypothesis has not been systematically tested. To examine systematics garnets metamorphism, we conducted dating on individual crystals different sizes from a single micaschist North Qilian orogenic belt. dates correlate well with grain their core Mn concentrations. positive correlation between ages suggests size proxy for preserving nucleation history. Small grains nucleated grew later than large crystals. date faithfully recorded total time span. difference ~16 Myr minimum growth. age discrepancy eclogite indicates they may have experienced same subduction exhumation
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ژورنال
عنوان ژورنال: Minerals
سال: 2023
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min13020276