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Article: Thermal evolution of Archean basement rocks from the eastern part of the North China craton and its bearing on tectonic setting
Title | Thermal evolution of Archean basement rocks from the eastern part of the North China craton and its bearing on tectonic setting |
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Authors | |
Keywords | Archean China Metamorphic Rock |
Issue Date | 1998 |
Publisher | Taylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR |
Citation | International Geology Review, 1998, v. 40 n. 8, p. 706-721 How to Cite? |
Abstract | The basement rocks in the eastern zone of the North China craton are composed predominantly of pretectonic tonalitic-trondhjemitic-granodioritic gneisses and syntectonic granitoids, with rafts of supracrustal rocks consisting of ultramafic to felsic volcanic and sedimentary rocks, metamorphosed over a range of conditions from greenschist to granulite facies. Most mafic granulites, amphibolites, and some pelitic gneisses and schists preserve the prograde, peak, and post-peak textures. The prograde metamorphic stage is indicated by mineral inclusions within minerals of the peak stage, represented by the assemblages of hornblende + plagioclase + quartz ± biotite in mafic granulites, chlorite + actinolite + epidote + plagioclase + quartz in amphibolites, and biotite + plagioclase + quartz in pelitic gneisses. The peak stage is shown by assemblages of orthopyroxene + clinopyroxene + garnet + plagioclase + quartz in the mafic granulites, hornblende + plagioclase + quartz + garnet in garnetiferous amphibolites, and garnet + sillimanite + plagioclase + quartz + biotite in pelitic gneisses. The post-peak stage is represented by garnet + quartaz symplectic coronas in mafic granulites, actinolite + garnet retrogressive rims around garnet or hornblende grains in amphibolites, and kyanite replacing sillimanite or staurolite replacing sillimanite + garnet pelitic gneisses. These textural relations and their P-T estimates define counterclockwise P-T paths. The P-T-t(ime) paths of metamorphic rocks from the eastern zone reflect an origin related to the intrusion and underplating of large amounts of mantle-derived magmas that not only provided heat for the metamorphism but also added a large volume of mostly mafic material to the base of the crust. Crustal growth therefore was dominated by vertical addition of mantle-derived magmas to the crust. Combined with lithologic, structural, metamorphic, and geochronologic considerations, these large volumes of underplated magma are considered to be related to upwelling mantle plumes (hotspots). |
Persistent Identifier | http://hdl.handle.net/10722/151007 |
ISSN | 2023 Impact Factor: 2.1 2023 SCImago Journal Rankings: 0.927 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhao, G | en_US |
dc.contributor.author | Wilde, SA | en_US |
dc.contributor.author | Cawood, PA | en_US |
dc.date.accessioned | 2012-06-26T06:15:45Z | - |
dc.date.available | 2012-06-26T06:15:45Z | - |
dc.date.issued | 1998 | en_US |
dc.identifier.citation | International Geology Review, 1998, v. 40 n. 8, p. 706-721 | en_US |
dc.identifier.issn | 0020-6814 | en_US |
dc.identifier.uri | http://hdl.handle.net/10722/151007 | - |
dc.description.abstract | The basement rocks in the eastern zone of the North China craton are composed predominantly of pretectonic tonalitic-trondhjemitic-granodioritic gneisses and syntectonic granitoids, with rafts of supracrustal rocks consisting of ultramafic to felsic volcanic and sedimentary rocks, metamorphosed over a range of conditions from greenschist to granulite facies. Most mafic granulites, amphibolites, and some pelitic gneisses and schists preserve the prograde, peak, and post-peak textures. The prograde metamorphic stage is indicated by mineral inclusions within minerals of the peak stage, represented by the assemblages of hornblende + plagioclase + quartz ± biotite in mafic granulites, chlorite + actinolite + epidote + plagioclase + quartz in amphibolites, and biotite + plagioclase + quartz in pelitic gneisses. The peak stage is shown by assemblages of orthopyroxene + clinopyroxene + garnet + plagioclase + quartz in the mafic granulites, hornblende + plagioclase + quartz + garnet in garnetiferous amphibolites, and garnet + sillimanite + plagioclase + quartz + biotite in pelitic gneisses. The post-peak stage is represented by garnet + quartaz symplectic coronas in mafic granulites, actinolite + garnet retrogressive rims around garnet or hornblende grains in amphibolites, and kyanite replacing sillimanite or staurolite replacing sillimanite + garnet pelitic gneisses. These textural relations and their P-T estimates define counterclockwise P-T paths. The P-T-t(ime) paths of metamorphic rocks from the eastern zone reflect an origin related to the intrusion and underplating of large amounts of mantle-derived magmas that not only provided heat for the metamorphism but also added a large volume of mostly mafic material to the base of the crust. Crustal growth therefore was dominated by vertical addition of mantle-derived magmas to the crust. Combined with lithologic, structural, metamorphic, and geochronologic considerations, these large volumes of underplated magma are considered to be related to upwelling mantle plumes (hotspots). | en_US |
dc.language | eng | en_US |
dc.publisher | Taylor & Francis Inc. The Journal's web site is located at http://www.tandf.co.uk/journals/TIGR | en_US |
dc.relation.ispartof | International Geology Review | en_US |
dc.subject | Archean | en_US |
dc.subject | China | en_US |
dc.subject | Metamorphic Rock | en_US |
dc.title | Thermal evolution of Archean basement rocks from the eastern part of the North China craton and its bearing on tectonic setting | en_US |
dc.type | Article | en_US |
dc.identifier.email | Zhao, G:gzhao@hkucc.hku.hk | en_US |
dc.identifier.authority | Zhao, G=rp00842 | en_US |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.scopus | eid_2-s2.0-0032456534 | en_US |
dc.identifier.volume | 40 | en_US |
dc.identifier.issue | 8 | en_US |
dc.identifier.spage | 706 | en_US |
dc.identifier.epage | 721 | en_US |
dc.identifier.isi | WOS:000076057900004 | - |
dc.publisher.place | United States | en_US |
dc.identifier.scopusauthorid | Zhao, G=7403296321 | en_US |
dc.identifier.scopusauthorid | Wilde, SA=35254758600 | en_US |
dc.identifier.scopusauthorid | Cawood, PA=7004146041 | en_US |
dc.identifier.issnl | 0020-6814 | - |