Fission-track dating calibration of age standards in a Korean reactor, HANARO

Lim, Hyoun Soo; Lee, Yong Ii

doi:10.1007/bf02914033

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Samples were irradiated at the NAA‐1 facility in HANARO reactor of the Korean Atomic Energy Research Institute (KAERI). This facility has a high Cd ratio of 250 for Au (Lim & Lee, 2000), which satisfies the criteria recommended by Hurford (1990). As a dosimeter glass for calibration, NIST SRM612 was used.…”

Section: Methodsmentioning

confidence: 99%

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Thermal history of the Cretaceous Sindong Group, Gyeongsang Basin, Korea based on fission track analysis

2003

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Apatite and zircon fission track (FT) analyses were carried out to reconstruct the thermal history of the Lower Cretaceous Sindong Group, which is the lowermost stratal unit of the Gyeongsang Basin, Korea. Zircon FT central ages show a wide range from 83 + 5 to 157 + 18 Ma, and single-grain age spectra have multiple age populations, whereas all apatites have very consistent FT ages of c. 60 Ma, suggesting a totally reset cooling age. Co-existence of both older and younger ages compared with the depositional age and relatively short mean track length indicate that the Sindong zircons were partially annealed. The Sindong Group was heated into the zircon partial annealing zone (ZPAZ) around 80 Ma, and cooled below the apatite closure temperature at c. 60 Ma. Based on the zircon FT results combined with vitrinite reflectance data, the maximum palaeotemperature to which the Sindong Group had been subjected can be inferred to be about 260 8C. Zircon FT data from a granite body that is in contact with the Sindong Group and sandstones close to the granite body indicate that thermal influence caused by Upper Cretaceous intrusive rocks was limited in close vicinity of the intrusion and that the major heat source of the Sindong Group was burial. The thickness of uplifted and eroded section is estimated to be about 7 km.

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Section: Methodsmentioning

confidence: 99%

“…Track lengths in apatite crystals were not measured because of the generally very low spontaneous track densities (< 1.0 × 10 6 cm −2 ). For apatite and zircons we adopted ζ ‐values of 346.5 ± 10.4 (2 σ ) and 337.6 ± 25.4(2 σ ), respectively (Lim & Lee, 2000).…”

Section: Methodsmentioning

confidence: 99%

Thermal history of the Cretaceous Sindong Group, Gyeongsang Basin, Korea based on fission track analysis

2003

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“…Thermal neutron irradiation was carried out at the NAA-1 facility in the HANARO reactor of the Korea Atomic Energy Research Institute, and fluences were monitored by counting tracks in muscovite external detectors over NIST-SRM612 glasses. This facility has a high Cd ratio of approximately 250 for Au (Lim & Lee 2000), which satisfies the criterion recommended by Hurford (1990). After irradiation, the external muscovite detectors were detached and etched in 48% HF at 32 Ϯ 0.5°C for 4 min.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermal histories of Cretaceous basins in Korea: Implications for response of the East Asian continental margin to subduction of the Paleo‐Pacific Plate

Choi

Lee

2011

Island Arc

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Thermal histories of Cretaceous sedimentary basins in the Korean peninsula have been assessed to understand the response of the East Asian continental margin to subduction of the Paleo-Pacific (Izanagi) Plate. The Izanagi Plate subducted obliquely beneath the East Asian continent during the Early Cretaceous and orthogonally in the Late Cretaceous. First, the Jinan Basin, a pull-apart basin, was studied by illite crystallinity and apatite fission-track analyses. Analytical results indicate that Jinan Basin sediment was heated to a maximum temperature of approximately 287°C by burial. The sediment experienced two cooling episodes during ca 95-80 Ma and after ca 30 Ma, with a quiescent period between them. A similar cooling pattern is recognized in the Gyeongsang Basin, the largest Cretaceous basin in Korea. The Jinan and Gyeongsang Basins were cooled mainly by exhumation between ca 95 and 80 Ma, but the former was exhumed slightly earlier than the latter by transpressional force due to the subduction direction change of the Izanagi Plate. Comparison of thermal history of Korean Cretaceous basins with those of granitoids in northeastern China and the accretionary complexes in southwestern Japan reveals that the Upper Cretaceous regional exhumation of the East Asian continental margin including the Korean peninsula during ca 95-80 Ma was facilitated by the subduction of the Izanagi-Pacific ridge, which migrated northeastwards with time, resulting in the end of regional exhumation at ca 80 Ma in this region.

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Thermal histories of the Cretaceous Pungam and Yeongdong basins, Korea based on apatite and zircon fission track analysis

Choi

Lee

2006

Geosci J

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Fission-track dating calibration of age standards in a Korean reactor, HANARO

Cited by 4 publications

References 20 publications

Thermal history of the Cretaceous Sindong Group, Gyeongsang Basin, Korea based on fission track analysis

Thermal history of the Cretaceous Sindong Group, Gyeongsang Basin, Korea based on fission track analysis

Thermal histories of Cretaceous basins in Korea: Implications for response of the East Asian continental margin to subduction of the Paleo‐Pacific Plate

Thermal histories of the Cretaceous Pungam and Yeongdong basins, Korea based on apatite and zircon fission track analysis

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