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Article: A synthesis of geochemistry and Sm–Nd isotopes of Archean granitoid gneisses in the Jiaodong Terrane: Constraints on petrogenesis and tectonic evolution of the Eastern Block, North China Craton

TitleA synthesis of geochemistry and Sm–Nd isotopes of Archean granitoid gneisses in the Jiaodong Terrane: Constraints on petrogenesis and tectonic evolution of the Eastern Block, North China Craton
Authors
KeywordsArchean
Crustal evolution
Petrogenesis
Jiaodong Terrane
North China Craton
Issue Date2014
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres
Citation
Precambrian Research, 2014, v. 255, pt. 3, p. 885-899 How to Cite?
AbstractThe Jiaodong Terrane is situated in the northeastern part of the Shandong Province in eastern China, experiencing multi-stage magmatism during the Mesoarchean (∼2.9 Ga) and Neoarchean (∼2.7 Ga and ∼2.5 Ga). It consists dominantly of granitoid gneisses with minor amphibolite enclaves or lenses. This study presents new whole-rock geochemical and Sm–Nd isotopic data for the Archean granitoid gneisses from the Jiaodong Terrane in order to constrain their petrogenesis and tectonic setting. Geochemical studies and petrological features suggest that the protoliths of most granitoid gneisses are typical Archean tonalitic–trondhjemitic–granodioritic (TTG) suites, which are high in SiO2 (60.9–76.8 wt.%), Al2O3 (12.6–16.8 wt.%), Na2O (3.3–5.3 wt.%), Sr (135–604 ppm) and Sr/Y ratios (13.9–84), but low in MgO (0.4–4.5 wt.%), K2O (0.7–3.4 wt.%), TiO2 (0.2–0.9 wt.%), Cr (<0.5–37.9 ppm), Ni (<0.5–24 ppm), Y (2.8–19 ppm) and Mg number (Mg# = 30–45). They are generally enriched in light rare earth elements (LREE) and large ion lithophile elements (LILE), depleted in heavy rare earth elements (HREE) and high field strength elements (HFSE), with slight Eu anomalies. These geochemical features suggest that they were derived from partial melting of metabasaltic rocks leaving eclogite or garnet–amphibolite dominant in the residue. Whole-rock Nd isotopes reveal that the protoliths of Mesoarchean (∼2.9 Ga) granitoid gneisses were derived mainly from juvenile sources, whereas the early Neoarchean (∼2.7 Ga) granitoid gneisses were derived from juvenile sources with significant additions of crustal material and the late Neoarchean (∼2.5 Ga) granitoid gneisses were mainly derived from continental crustal sources. Combined with other geological considerations, a mantle plume model is favored to account for the generation of both early and late Neoarchean granitoid gneisses, whereas the tectonic setting for the Mesoarchean granitoid gneisses remains uncertain due to lack of geological data.
Persistent Identifierhttp://hdl.handle.net/10722/216875
ISSN
2017 Impact Factor: 3.907
2015 SCImago Journal Rankings: 3.214
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorWu, M-
dc.contributor.authorZhao, G-
dc.contributor.authorSun, M-
dc.contributor.authorLi, S-
dc.date.accessioned2015-09-18T05:41:50Z-
dc.date.available2015-09-18T05:41:50Z-
dc.date.issued2014-
dc.identifier.citationPrecambrian Research, 2014, v. 255, pt. 3, p. 885-899-
dc.identifier.issn0301-9268-
dc.identifier.urihttp://hdl.handle.net/10722/216875-
dc.description.abstractThe Jiaodong Terrane is situated in the northeastern part of the Shandong Province in eastern China, experiencing multi-stage magmatism during the Mesoarchean (∼2.9 Ga) and Neoarchean (∼2.7 Ga and ∼2.5 Ga). It consists dominantly of granitoid gneisses with minor amphibolite enclaves or lenses. This study presents new whole-rock geochemical and Sm–Nd isotopic data for the Archean granitoid gneisses from the Jiaodong Terrane in order to constrain their petrogenesis and tectonic setting. Geochemical studies and petrological features suggest that the protoliths of most granitoid gneisses are typical Archean tonalitic–trondhjemitic–granodioritic (TTG) suites, which are high in SiO2 (60.9–76.8 wt.%), Al2O3 (12.6–16.8 wt.%), Na2O (3.3–5.3 wt.%), Sr (135–604 ppm) and Sr/Y ratios (13.9–84), but low in MgO (0.4–4.5 wt.%), K2O (0.7–3.4 wt.%), TiO2 (0.2–0.9 wt.%), Cr (<0.5–37.9 ppm), Ni (<0.5–24 ppm), Y (2.8–19 ppm) and Mg number (Mg# = 30–45). They are generally enriched in light rare earth elements (LREE) and large ion lithophile elements (LILE), depleted in heavy rare earth elements (HREE) and high field strength elements (HFSE), with slight Eu anomalies. These geochemical features suggest that they were derived from partial melting of metabasaltic rocks leaving eclogite or garnet–amphibolite dominant in the residue. Whole-rock Nd isotopes reveal that the protoliths of Mesoarchean (∼2.9 Ga) granitoid gneisses were derived mainly from juvenile sources, whereas the early Neoarchean (∼2.7 Ga) granitoid gneisses were derived from juvenile sources with significant additions of crustal material and the late Neoarchean (∼2.5 Ga) granitoid gneisses were mainly derived from continental crustal sources. Combined with other geological considerations, a mantle plume model is favored to account for the generation of both early and late Neoarchean granitoid gneisses, whereas the tectonic setting for the Mesoarchean granitoid gneisses remains uncertain due to lack of geological data.-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres-
dc.relation.ispartofPrecambrian Research-
dc.subjectArchean-
dc.subjectCrustal evolution-
dc.subjectPetrogenesis-
dc.subjectJiaodong Terrane-
dc.subjectNorth China Craton-
dc.titleA synthesis of geochemistry and Sm–Nd isotopes of Archean granitoid gneisses in the Jiaodong Terrane: Constraints on petrogenesis and tectonic evolution of the Eastern Block, North China Craton-
dc.typeArticle-
dc.identifier.emailZhao, G: gzhao@hku.hk-
dc.identifier.emailSun, M: minsun@hku.hk-
dc.identifier.authorityZhao, G=rp00842-
dc.identifier.authoritySun, M=rp00780-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.precamres.2014.10.012-
dc.identifier.scopuseid_2-s2.0-84918797686-
dc.identifier.hkuros252289-
dc.identifier.hkuros250558-
dc.identifier.volume255, pt. 3-
dc.identifier.spage885-
dc.identifier.epage899-
dc.identifier.isiWOS:000347660600008-
dc.publisher.placeNetherlands-

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