Một trong những thành tựu quan trọng của việc áp dụng đồng vị phóng xạ trong nghiên cứu địa chất là định tuổi khoáng hoá. Trên cơ sở tổng hợp, đối sánh và đánh giá hệ đồng vị phổ biến trong định tuổi khoáng hóa hiện nay, một số phương pháp định tuổi tuyệt đối sử dụng hệ đồng vị Rb-Sr, Re-Os và Ar-Ar được xem xét trong nghiên cứu này. | Journal of Mining and Earth Sciences Vol. 62 Issue 2 2021 25 - 34 25 An overview of some dating methods of mineralization Hung The Khuong Faculty of Geosciences and Geoengineering Hanoi University of Mining and Geology Vietnam ARTICLE INFO ABSTRACT Article history One of the most important achievements of applying radioactive isotope in Received 18th Jan. 2021 the geological study is to determine the age of mineralization. Based on the Accepted 09th Mar. 2021 synthesis comparison and evaluation of the popular isotopic systems in Available online 30th Apr. 2021 dating mineralization the Rb - Sr Re - Os and Ar - Ar dating methods are Keywords discussed in this study. The results show that the Rb - Sr dating method is Dating mineralization likely to be successfully applied to sulfide mineralization. If the Isotopic system mineralization contains little or no sulfide minerals then the method is applied to other minerals in an ore mineral association. The Re - Os dating Rb - Sr Re - Os and Ar - Ar. method has shown great success when it is applied to hydrothermal deposits especially for the molybdenite - bearing vein deposits. The limitation of the method is that when the concentration of the Os element in molybdenite is low it is difficult to establish the Re Os ratio in a single mineral. The Ar - Ar isotope system for dating mineralization often uses mica or feldspar minerals which are minerals with blocking temperatures ranging from 150 350 0C and later metamorphic periods have higher than 350 0C often overprinted these minerals. Generally tectonic magmatic and metamorphic events which occur after mineralization can cause difficulty in determining the age of mineralization and collecting analysis samples. Copyright 2021 Hanoi University of Mining and Geology. All rights reserved. _ Corresponding author E - mail khuongthehung@ DOI 2 .03 26 Tạp chí Khoa học Kỹ thuật Mỏ - Địa chất Tập 62 Kỳ 2 2021 25 - 34 Tổng quan về một số phương pháp
