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Article: Two late Mesozoic volcanic events in Fujian Province: Constraints on the tectonic evolution of southeastern China

TitleTwo late Mesozoic volcanic events in Fujian Province: Constraints on the tectonic evolution of southeastern China
Authors
KeywordsGeochemistry
Mesozoic volcanism
South China
Ziron U-Pb age
Issue Date2009
PublisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR
Citation
International Geology Review, 2009, v. 51 n. 3, p. 216-251 How to Cite?
AbstractTwo representative geologic sections of the late Mesozoic 'Nanyuan Formation' volcanic rocks in eastern Fujian Province have been dated by SHRIMP zircon U-Pb techniques. The results identified two active volcanic stages at 162-150 Ma and 143-130 Ma. The rock association of the earlier period is composed of andesite-dacitic crystal tuff-rhyolitic ignimbrite. The rocks are enriched in alkali elements, Al 2O 3, large ion lithophile element (LILE) and light rare earth element (LREE), depleted in MgO, high field strength element (HFSE) and siderophile elements, and have similar σNd (t) values. These features indicate that the rocks were derived from a mantle source metasomatized by subduction-related fluids, and their chemical variations indicate fractional crystalization during magmatic evolution. In contrast, the rock association of the later period consists of tholeiitic basalt-rhyolitic crystal ignimbrites. The tholeiitic basalts have negative σNd (t) values (-3.4 to -2.6) and exhibit fractionated REE pattern with weak negative Eu anomalies. These rocks are enriched in LREE and depleted in HFSE with ratios of Ce/Pb=6.9-11.1, Th/U=2.7-4.0, La/Nb=2.2-3.0, suggesting that they were also subduction-related and experienced proportional fractionation of olivine and clinoproxene along with significant crustal contamination. The rhyolitic crystal ignimbrites are generally characterized by rather high K, Rb, Th and relatively low Nb, Sr, Ti, P, with relatively low σNd (t) values (-5.3 to -6.0), impling that they were derived from a different source from the tholeiitic basalt. Judging by extensive overthrust structures, the occurrence of the earlier rock association is considered to have been generated in a compressional tectonic environment during the early stage (>150 Ma) of Pacific plate subduction, In contrast, the later bimodal association was generated in an extensional tectonic setting during a later stage (<143 Ma ) of subduction.
Persistent Identifierhttp://hdl.handle.net/10722/58694
ISSN
2015 Impact Factor: 2.365
2015 SCImago Journal Rankings: 1.248
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Research Grant Council (HKU)7041/05
Chinese Ministry of Land and Resources200811015
Geological Survey1212010610611
Regional Geological Survey of Quanzhou, Fuzhou, Putian and Zhouning200413000016
Funding Information:

The authors appreciate the assistance of X. P. Xia and X. Fu in ICP-MS and XRF analyses, C. F. Li for Nd isotopic analysis and B. Song for SHRIMP analysis. Y. H. He, H. Y. Geng, and Kenny Wong are thanked for their helpful discussion and Y. Jiang and Z. H. Chen for help in the field. This study was financially supported by research grants from the Hong Kong Research Grant Council (HKU 7041/05), the Chinese Ministry of Land and Resources (200811015), the Geological Survey (Grant No. 1212010610611) and the Project for 1: 250,000 scale Regional Geological Survey of Quanzhou, Fuzhou, Putian and Zhouning (Grant No. 200413000016). A HKU postgraduate studentship to Longming Li is gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorLi, LMen_HK
dc.contributor.authorSun, Men_HK
dc.contributor.authorXing, GFen_HK
dc.contributor.authorZhao, GCen_HK
dc.contributor.authorZhou, MFen_HK
dc.contributor.authorWong, Jen_HK
dc.contributor.authorChen, Ren_HK
dc.date.accessioned2010-05-31T03:35:09Z-
dc.date.available2010-05-31T03:35:09Z-
dc.date.issued2009en_HK
dc.identifier.citationInternational Geology Review, 2009, v. 51 n. 3, p. 216-251en_HK
dc.identifier.issn0020-6814en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58694-
dc.description.abstractTwo representative geologic sections of the late Mesozoic 'Nanyuan Formation' volcanic rocks in eastern Fujian Province have been dated by SHRIMP zircon U-Pb techniques. The results identified two active volcanic stages at 162-150 Ma and 143-130 Ma. The rock association of the earlier period is composed of andesite-dacitic crystal tuff-rhyolitic ignimbrite. The rocks are enriched in alkali elements, Al 2O 3, large ion lithophile element (LILE) and light rare earth element (LREE), depleted in MgO, high field strength element (HFSE) and siderophile elements, and have similar σNd (t) values. These features indicate that the rocks were derived from a mantle source metasomatized by subduction-related fluids, and their chemical variations indicate fractional crystalization during magmatic evolution. In contrast, the rock association of the later period consists of tholeiitic basalt-rhyolitic crystal ignimbrites. The tholeiitic basalts have negative σNd (t) values (-3.4 to -2.6) and exhibit fractionated REE pattern with weak negative Eu anomalies. These rocks are enriched in LREE and depleted in HFSE with ratios of Ce/Pb=6.9-11.1, Th/U=2.7-4.0, La/Nb=2.2-3.0, suggesting that they were also subduction-related and experienced proportional fractionation of olivine and clinoproxene along with significant crustal contamination. The rhyolitic crystal ignimbrites are generally characterized by rather high K, Rb, Th and relatively low Nb, Sr, Ti, P, with relatively low σNd (t) values (-5.3 to -6.0), impling that they were derived from a different source from the tholeiitic basalt. Judging by extensive overthrust structures, the occurrence of the earlier rock association is considered to have been generated in a compressional tectonic environment during the early stage (>150 Ma) of Pacific plate subduction, In contrast, the later bimodal association was generated in an extensional tectonic setting during a later stage (<143 Ma ) of subduction.en_HK
dc.languageengen_HK
dc.publisherTaylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGRen_HK
dc.relation.ispartofInternational Geology Reviewen_HK
dc.subjectGeochemistryen_HK
dc.subjectMesozoic volcanismen_HK
dc.subjectSouth Chinaen_HK
dc.subjectZiron U-Pb ageen_HK
dc.titleTwo late Mesozoic volcanic events in Fujian Province: Constraints on the tectonic evolution of southeastern Chinaen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-6814&volume=51&spage=215&epage=251&date=2009&atitle=Two+late+Mesozoic+volcanic+events+in+Fujian+Province:+constraints+on+the+tectonic+evolution+of+southeastern+Chinaen_HK
dc.identifier.emailSun, M:minsun@hku.hken_HK
dc.identifier.emailZhao, GC:gzhao@hkucc.hku.hken_HK
dc.identifier.emailZhou, MF:mfzhou@hkucc.hku.hken_HK
dc.identifier.authoritySun, M=rp00780en_HK
dc.identifier.authorityZhao, GC=rp00842en_HK
dc.identifier.authorityZhou, MF=rp00844en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1080/00206810802619092en_HK
dc.identifier.scopuseid_2-s2.0-75449095240en_HK
dc.identifier.hkuros154998en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-75449095240&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume51en_HK
dc.identifier.issue3en_HK
dc.identifier.spage216en_HK
dc.identifier.epage251en_HK
dc.identifier.isiWOS:000264824500002-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLi, LM=24528876400en_HK
dc.identifier.scopusauthoridSun, M=25932315800en_HK
dc.identifier.scopusauthoridXing, GF=7103115605en_HK
dc.identifier.scopusauthoridZhao, GC=7403296321en_HK
dc.identifier.scopusauthoridZhou, MF=7403506005en_HK
dc.identifier.scopusauthoridWong, J=35207628900en_HK
dc.identifier.scopusauthoridChen, R=54411995600en_HK

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