Zobrazeno 1 - 10
of 26
pro vyhledávání: '"Albert Chang-sik Cheong"'
Publikováno v:
Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-17 (2024)
Abstract Background Mapping the distribution of bioavailable isotope ratios across landscapes serves as an efficient geochemical tool for delineating the origins and migration trajectories of humans and animals. Chungcheongbuk-do Province in central
Externí odkaz:
https://doaj.org/article/a113e08ca0b8442ba9a69db9c8c97242
Publikováno v:
Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-9 (2024)
Abstract Background The intricate textural patterns commonly observed in metamorphosed and recrystallized zircon (ZrSiO4) underscore the crucial necessity of understanding the underlying mechanisms governing their formation to ensure accurate interpr
Externí odkaz:
https://doaj.org/article/1be756744e644cc99e53415d7e343466
Publikováno v:
Journal of Analytical Science and Technology, Vol 15, Iss 1, Pp 1-10 (2024)
Abstract Background Laser ablation inductively coupled plasma mass spectrometry (LA-ICPMS) emerged in the mid-1980s and rapidly became a crucial dating tool. The advent of femtosecond LA systems has substantially reduced volatility-dependent mass fra
Externí odkaz:
https://doaj.org/article/5982c87d08394db3bb9a187989ded4b6
Autor:
Jeongmin Kim, Changkun Park, Keewook Yi, Shinae Lee, Sook Ju Kim, Min-Ji Jung, Albert Chang-sik Cheong
Publikováno v:
Journal of Analytical Science and Technology, Vol 13, Iss 1, Pp 1-8 (2022)
Abstract Background Monazite, a moderately common light rare earth element (LREE) and thorium phosphate mineral, has chemical, age, and isotopic characteristics that are useful in the investigation of the origin and evolution of crustal melts and flu
Externí odkaz:
https://doaj.org/article/6e9ef97b9d464931bfe89724f0c25cda
Publikováno v:
Journal of Analytical Science and Technology, Vol 12, Iss 1, Pp 1-10 (2021)
Abstract Background One of the most critical issues concerning in situ mass spectrometry lies in accounting for elements and molecules that overlap target isotopes of analytical interest in a sample. This study traced the instrumental mass fractionat
Externí odkaz:
https://doaj.org/article/c2481ad037ff449e92e6df7f8ddc4873
Publikováno v:
Journal of Analytical Science and Technology, Vol 9, Iss 1, Pp 1-8 (2018)
Abstract Background The 238U–230Th disequilibrium dating of the mineral zircon (ZrSiO4) provides an efficient tool for investigating the time scales of Quaternary magmatic processes. In situ mass spectrometric U–Th microanalysis of zircon require
Externí odkaz:
https://doaj.org/article/bff88e4b79dd426da323f1c050da826e
Autor:
Albert Chang-sik Cheong, Youn-Joong Jeong, Shinae Lee, Keewook Yi, Hui Je Jo, Ho-Sun Lee, Changkun Park, Nak Kyu Kim, Xian-Hua Li, Sandra L. Kamo
Publikováno v:
Minerals, Vol 9, Iss 5, p 325 (2019)
This study introduces a new zircon reference material, LKZ-1, for the in situ U−Pb dating and O−Hf isotopic and trace element analyses. The secondary ion mass spectrometric analyses for this gem-quality single-crystal zircon yielded a weighted me
Externí odkaz:
https://doaj.org/article/46497093c838454fae8ab7cfd221d5ee
Autor:
Albert Chang-sik Cheong, Hui Je Jo
Publikováno v:
Gondwana Research. 88:21-44
This study used new and published U-Pb geochronological, chemical, and Sr-Nd-Hf-O isotopic data (n > 2500) from Jurassic granite-granodiorite-diorite-monzonite-gabbro plutons in the southern part of the Korean Peninsula to assess the spatiotemporal e
Autor:
Sung-Gyun Yim, Albert Chang-sik Cheong, Gi Young Jeong, Jong-Sik Ryu, Youn-Joong Jeong, Min-Ji Jung
Publikováno v:
Geosciences Journal. 24:625-632
Stable isotope signatures of geologic, atmospheric, and hydrologic sources are transferred to the ecosystem through the food chain. The present study used Sr isotope data of soil and plant samples collected from Jeju Island to explore the roles of th
Publikováno v:
Geoscience Frontiers. 14:101492