Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia
In the northwestern Korean Peninsula, Cretaceous volcanic rocks are composed of andesite, andesite-dacite and rhyolite intercalated with terrigenous clastic rocks. Zircon grains selected from these rocks are authigenic zircons with obvious crystal edges and oscillatory zoning, their Th/U ratios bein...
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| Format: | Article |
| Language: | English |
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Elsevier
2022-12-01
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| Series: | Journal of Asian Earth Sciences: X |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590056022000421 |
| _version_ | 1828268336124788736 |
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| author | Jonghyok Yang Hyonchol Ku Ung Pak Chungil Ri Myongchol Kim Cholsu Jong Hyonuk Pak Jongnam Kim Songhyok Ju Cholhyon Kim Jusong Yun Sunghyon Kim |
| author_facet | Jonghyok Yang Hyonchol Ku Ung Pak Chungil Ri Myongchol Kim Cholsu Jong Hyonuk Pak Jongnam Kim Songhyok Ju Cholhyon Kim Jusong Yun Sunghyon Kim |
| author_sort | Jonghyok Yang |
| collection | DOAJ |
| description | In the northwestern Korean Peninsula, Cretaceous volcanic rocks are composed of andesite, andesite-dacite and rhyolite intercalated with terrigenous clastic rocks. Zircon grains selected from these rocks are authigenic zircons with obvious crystal edges and oscillatory zoning, their Th/U ratios being generally larger than 0.4 (0.16–2.22), indicating magmatic origin. Most rocks were formed at Early Cretaceous Albian (113–103 Ma) and partially, at late Aptian, Prior to this time magmatism took place at 125 Ma and 135 Ma. All the negative εHf(t) values mean that these magma sources were contaminated by crust materials or derived from enriched mantle. Volcanic rocks belong to calc-alkaline series and partially to peraluminous series with relatively high alkali content. Chondrite-normalized REE patterns display right-lean LREE rich type and Primitive-mantle-normalized REE patterns do obvious negative anomalies in LILE (Ba, Sr), HFSE (Nb, Ta, P, Zr, Ti), but obvious positive anomalies in LIL (Rb, Pb) and HFS (Th, U, Nd). These volcanic rocks were formed in continental arc setting and their geochemical properties being similar to those of arc ADR (normal Island-Arc Andesite-Dacite-Rhyolite) suite rather than those of adakite. In the Late Early Cretaceous, west area of northeastern Asia including western Liaoning, China was in extensional setting but east area of northeastern Asia including northwestern Korean Peninsula, Jihei, eastern China and Far East areas, Russia were in continental arc setting. |
| first_indexed | 2024-04-13T05:17:24Z |
| format | Article |
| id | doaj.art-5e29f403abda404ea99949d38d1658ed |
| institution | Directory Open Access Journal |
| issn | 2590-0560 |
| language | English |
| last_indexed | 2024-04-13T05:17:24Z |
| publishDate | 2022-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Asian Earth Sciences: X |
| spelling | doaj.art-5e29f403abda404ea99949d38d1658ed2022-12-22T03:00:51ZengElsevierJournal of Asian Earth Sciences: X2590-05602022-12-018100121Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast AsiaJonghyok Yang0Hyonchol Ku1Ung Pak2Chungil Ri3Myongchol Kim4Cholsu Jong5Hyonuk Pak6Jongnam Kim7Songhyok Ju8Cholhyon Kim9Jusong Yun10Sunghyon Kim11Institute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of Korea; Corresponding author.Institute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of Korea; School of Earth Sciences and Resources, China University of Geosciences (Beijing), ChinaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaInstitute of Geology, State Academy of Sciences, Pyongyang, Democratic People's Republic of KoreaIn the northwestern Korean Peninsula, Cretaceous volcanic rocks are composed of andesite, andesite-dacite and rhyolite intercalated with terrigenous clastic rocks. Zircon grains selected from these rocks are authigenic zircons with obvious crystal edges and oscillatory zoning, their Th/U ratios being generally larger than 0.4 (0.16–2.22), indicating magmatic origin. Most rocks were formed at Early Cretaceous Albian (113–103 Ma) and partially, at late Aptian, Prior to this time magmatism took place at 125 Ma and 135 Ma. All the negative εHf(t) values mean that these magma sources were contaminated by crust materials or derived from enriched mantle. Volcanic rocks belong to calc-alkaline series and partially to peraluminous series with relatively high alkali content. Chondrite-normalized REE patterns display right-lean LREE rich type and Primitive-mantle-normalized REE patterns do obvious negative anomalies in LILE (Ba, Sr), HFSE (Nb, Ta, P, Zr, Ti), but obvious positive anomalies in LIL (Rb, Pb) and HFS (Th, U, Nd). These volcanic rocks were formed in continental arc setting and their geochemical properties being similar to those of arc ADR (normal Island-Arc Andesite-Dacite-Rhyolite) suite rather than those of adakite. In the Late Early Cretaceous, west area of northeastern Asia including western Liaoning, China was in extensional setting but east area of northeastern Asia including northwestern Korean Peninsula, Jihei, eastern China and Far East areas, Russia were in continental arc setting.http://www.sciencedirect.com/science/article/pii/S2590056022000421Korean peninsulaCretaceous volcanic rocksZircon U-Pb agesHf isotopesGeochemistry |
| spellingShingle | Jonghyok Yang Hyonchol Ku Ung Pak Chungil Ri Myongchol Kim Cholsu Jong Hyonuk Pak Jongnam Kim Songhyok Ju Cholhyon Kim Jusong Yun Sunghyon Kim Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia Journal of Asian Earth Sciences: X Korean peninsula Cretaceous volcanic rocks Zircon U-Pb ages Hf isotopes Geochemistry |
| title | Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia |
| title_full | Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia |
| title_fullStr | Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia |
| title_full_unstemmed | Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia |
| title_short | Zircon U-Pb ages and geochemistry of Early Cretaceous volcanic rocks, northwestern Korean Peninsula: Constraints on Late Early Cretaceous continental arc distribution in Northeast Asia |
| title_sort | zircon u pb ages and geochemistry of early cretaceous volcanic rocks northwestern korean peninsula constraints on late early cretaceous continental arc distribution in northeast asia |
| topic | Korean peninsula Cretaceous volcanic rocks Zircon U-Pb ages Hf isotopes Geochemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2590056022000421 |
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