Stratigraphic correlation of Cretaceous non-marine sedimentary basins of Southeast Korea and Southwest Japan
| Project/Area Number |
06044254
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| Research Category |
Grant-in-Aid for Overseas Scientific Survey.
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| Allocation Type | Single-year Grants |
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| Research Institution | Nagoya University |
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Principal Investigator |
ADACHI Mamoru Nagoya University, 理学部, 教授 (10113094)
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| Co-Investigator(Kenkyū-buntansha) |
CHOI Sung-ja Korea Institute of Geology, Mining and Materials, 資源研究所, 主任研究員
KOJIMA Satoru Nagoya University, 理学部, 助教授 (20170243)
SUZUKI Kazuhiro Nagoya University, 理学部, 助教授 (90111624)
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| Project Period (FY) |
1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Keywords | Korean Peninsula / Cretaceous non-marine sediments / Kyongsang Group / Okchon belt / CHIME age / Clastic monazite / Chert clasts / Precambrian gneiss |
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| Research Abstract |
Cretaceous non-marine sedimentary rocks called the Kyongsang Group are widespread in the southeastern Korean Peninsula. The following results were obtained from this research.
(1) The Kyongsang Group in the Yongyang area that occupies the northern part of the Kyongsang Basin consists mainly of sandstone, conglomerate and red siltstone. The conglomerate, although very rare, contains chert clasts in some horizons. Several chocolate brown chert clasts yielded well-preserved permian radiolarians of the Follicucullus group.
(2) The matrix sandstone of the above Cretaceous conglomerate contains such heavy minerals of tourmaline, opaques, zircon and monazite. The detrital monazites yielded CHIME ages of ca.1500 Ma of middle Proterozoic age and ca.250 Ma of Permian-Triassic boundary age.
(3) Black phyllite and schist in the Okchon Belt to the southeast of Chunju sporadically contain clasts of quartzite, granitoid, marl and limestone. The granitic gneiss clasts yielded CHIME monazite ages of 1450 Ma, suggesting that middle Proterozoic granite and gneiss were present in the provenance of Okchon clastic rocks.
(4) The Okchon metamorphic rocks exposed near the Chunju dam consist of metabasite, dolomite, quartzite and metapelite. Garnet-bearing actinolite-epidote schist of basaltic tuff origin contains allanite that yields CHIME ages of ca.250 Ma. This age probably represents the time of regional metamorphism of the Okchon schists.
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Report
(1 results)
Research Products
(4 results)
