Study of the nano-scale plastic deformation in zircon: application to meaningful geochronology

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Although, due to the COVID-19 pandemic, research work, particularly field survey and sample collection for the proposed research project in the overseas countries was delayed so far. However, significant progress on samples collected in the past geological fields have been achieved. Detailed petrography, mineral chemistry, andEBSD analysis on high and ultrahigh-temperature metamorphic rocks have been conducted on some samples. Some of the research results are already published in year 2022, and/or under submission to be published within 2023.Additional petrological, geochemical, and geophysical work on other samples is in progress currently.Some of the research results have been presented at the 14th International eclogite conference that was held in Lyon, France, in July, 2022.