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Article: Implications based on the first SHRIMP U-Pb zircon dating on Precambrian granitoid rocks in North Korea

TitleImplications based on the first SHRIMP U-Pb zircon dating on Precambrian granitoid rocks in North Korea
Authors
KeywordsGranitoid rocks
North China
North Korea
Precambrian geology
SHRIMP zircon age
Issue Date2006
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epsl
Citation
Earth And Planetary Science Letters, 2006, v. 251 n. 3-4, p. 365-379 How to Cite?
AbstractPrecambrian basement rocks in North Korea consist of supracrustals and granitoid rocks, of which the former comprise the late Archean Nangrim Group and the Paleoproterozoic Jungsan and Machollyong Groups, whereas the latter include four major types: grey TTG gneisses, garnet/sillimanite-bearing (S-type) granites, massive porphyritic granites, and hornblende-bearing granites. SHRIMP U-Pb zircon geochronology, combined with cathodoluminescence (CL) imaging has enabled for resolution of magmatic and metamorphic events that can be directed towards understanding the Precambrian history of North Korea and its relations to North China. SHRIMP U-Pb zircon analyses on two grey gneiss samples (PO501 and K14) reveal that they were emplaced at 2538 ± 14 Ma and 2636 ± 49 Ma, respectively, and metamorphosed at 2462-2433 Ma. These data, for the first time, confirm the existence of late Archean rocks in the Korean Peninsula. Moreover, one grey gneiss sample (K14) contains several zircons with ages of 3.1-3.4 Ga, suggesting possible middle Archean crust in North Korea. Rocks with such ages are widely distributed in North China, implying that North China and North Korea have similar Archean basement. One grey gneiss sample (R53) yielded a SHRIMP zircon age of 1933 ± 12 Ma, indicating that some grey gneisses in North Korea formed during the Paleoproterozoic. Two garnet- and/or sillimanite-bearing S-type granite samples gave 207Pb/206Pb ages of 1908 ± 31 Ma and 1903 ± 49 Ma, interpreted to reflect the time of metamorphism of the Paleoproterozoic Jungsan and Machollyong Groups since these S-type granites are considered to be derived from the partial melting of pelitic rocks from these groups. The ∼ 1.9 Ga metamorphic event has also been revealed in Paleoproterozoic rocks in South Korea and North China. SHRIMP zircon data also show that massive porphyritic monzogranites in North Korea evolved over a protracted interval from 1865 Ma to 1843 Ma. Similar-aged porphyritic monzogranites are also found in North China and South Korea, and their origin is considered to be related to a post-tectonic extensional event of regional extent. The last phase of Precambrian magmatism recognized in North Korea is Grenvillian-aged, represented by the hornblende-bearing granite that yields a SHRIMP zircon age of 1195 ± 4 Ma, and is considered to be the source rock of the adjacent Yushulazi Group (North China) that contains numerous 1.1-1.2 Ga old detrital zircons. © 2006 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/72708
ISSN
2015 Impact Factor: 4.326
2015 SCImago Journal Rankings: 3.628
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorZhao, Gen_HK
dc.contributor.authorCao, Len_HK
dc.contributor.authorWilde, SAen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorChoe, WJen_HK
dc.contributor.authorLi, Sen_HK
dc.date.accessioned2010-09-06T06:44:21Z-
dc.date.available2010-09-06T06:44:21Z-
dc.date.issued2006en_HK
dc.identifier.citationEarth And Planetary Science Letters, 2006, v. 251 n. 3-4, p. 365-379en_HK
dc.identifier.issn0012-821Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/72708-
dc.description.abstractPrecambrian basement rocks in North Korea consist of supracrustals and granitoid rocks, of which the former comprise the late Archean Nangrim Group and the Paleoproterozoic Jungsan and Machollyong Groups, whereas the latter include four major types: grey TTG gneisses, garnet/sillimanite-bearing (S-type) granites, massive porphyritic granites, and hornblende-bearing granites. SHRIMP U-Pb zircon geochronology, combined with cathodoluminescence (CL) imaging has enabled for resolution of magmatic and metamorphic events that can be directed towards understanding the Precambrian history of North Korea and its relations to North China. SHRIMP U-Pb zircon analyses on two grey gneiss samples (PO501 and K14) reveal that they were emplaced at 2538 ± 14 Ma and 2636 ± 49 Ma, respectively, and metamorphosed at 2462-2433 Ma. These data, for the first time, confirm the existence of late Archean rocks in the Korean Peninsula. Moreover, one grey gneiss sample (K14) contains several zircons with ages of 3.1-3.4 Ga, suggesting possible middle Archean crust in North Korea. Rocks with such ages are widely distributed in North China, implying that North China and North Korea have similar Archean basement. One grey gneiss sample (R53) yielded a SHRIMP zircon age of 1933 ± 12 Ma, indicating that some grey gneisses in North Korea formed during the Paleoproterozoic. Two garnet- and/or sillimanite-bearing S-type granite samples gave 207Pb/206Pb ages of 1908 ± 31 Ma and 1903 ± 49 Ma, interpreted to reflect the time of metamorphism of the Paleoproterozoic Jungsan and Machollyong Groups since these S-type granites are considered to be derived from the partial melting of pelitic rocks from these groups. The ∼ 1.9 Ga metamorphic event has also been revealed in Paleoproterozoic rocks in South Korea and North China. SHRIMP zircon data also show that massive porphyritic monzogranites in North Korea evolved over a protracted interval from 1865 Ma to 1843 Ma. Similar-aged porphyritic monzogranites are also found in North China and South Korea, and their origin is considered to be related to a post-tectonic extensional event of regional extent. The last phase of Precambrian magmatism recognized in North Korea is Grenvillian-aged, represented by the hornblende-bearing granite that yields a SHRIMP zircon age of 1195 ± 4 Ma, and is considered to be the source rock of the adjacent Yushulazi Group (North China) that contains numerous 1.1-1.2 Ga old detrital zircons. © 2006 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/epslen_HK
dc.relation.ispartofEarth and Planetary Science Lettersen_HK
dc.subjectGranitoid rocksen_HK
dc.subjectNorth Chinaen_HK
dc.subjectNorth Koreaen_HK
dc.subjectPrecambrian geologyen_HK
dc.subjectSHRIMP zircon ageen_HK
dc.titleImplications based on the first SHRIMP U-Pb zircon dating on Precambrian granitoid rocks in North Koreaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0012-821X&volume=251&issue=3-4&spage=365&epage=379&date=2006&atitle=Implications+based+on+the+first+SHRIMP+U-Pb+zircon+dating+on+Precambrian+granitoid+rocks+in+North+Koreaen_HK
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.authorityZhao, G=rp00842en_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.epsl.2006.09.021en_HK
dc.identifier.scopuseid_2-s2.0-33751038125en_HK
dc.identifier.hkuros127550en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33751038125&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume251en_HK
dc.identifier.issue3-4en_HK
dc.identifier.spage365en_HK
dc.identifier.epage379en_HK
dc.identifier.isiWOS:000242731500013-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridZhao, G=7403296321en_HK
dc.identifier.scopusauthoridCao, L=37019563300en_HK
dc.identifier.scopusauthoridWilde, SA=35254758600en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridChoe, WJ=49161004400en_HK
dc.identifier.scopusauthoridLi, S=8784176300en_HK

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