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Article: Paleoproterozoic deep processes and tectono-thermal evolution in the Jiao-Liao Massif

TitlePaleoproterozoic deep processes and tectono-thermal evolution in the Jiao-Liao Massif
Authors
KeywordsDeep Processes
Delamination
Paleoproterozoic
Tectono-Thermal Evolution
Underplating
Issue Date2003
Citation
Acta Geologica Sinica, 2003, v. 77 n. 3, p. 339-357 How to Cite?
AbstractNew data obtained over the past few years indicate that the North China Craton consisted of the eastern and western blocks that collided along Trans-North China Orogen at 1.85 Ga. Before the collision, the western margin of the eastern block was active continental margin that has been studied in detail. However, the Paleoproterozoic Jiao-Liao-Ji orogenic belt in the eastern margin of the eastern block has received little attention. New multi-disciplinary study indicates that the tectono-thermal evolution and deep processes in the Jiao-Liao-Ji orogenic belt are summarized as following. The early mantle-plume-related underplating at a range from 2.53 to 2.36 Ga led to the 2.47 ∼ 2.33 Ga intrusion of alkaline granite and malfic dyke swarm, the rifting of the Jiao-Liao-Ji rift and the bi-modal volcanism. The early underplating also resulted in not only sedimentary environments in the rift but also the differentiation of the initial thermal architecture in the crust that controlled different metamorphism types and P-T-t paths in he different part of the rift. The later underplating resulted in the formations of the A-type Liaoji Granites of about 2.17 Ga in the lower crust and the pegmatite of 2.2 Ga and 2.0 Ga, and bedding-parallel deformation. However, the main orogenic deformations occurred at a range from 1.911 to 1.883 Ga accompanying with the high-pressure metamorphism in the southern part of the orogen, the closing of the rift and the compressional deformations. Then, from 1.875 to 1.66 Ga, a little lithospheric blocks were delaminated, anorogenic plutons such as rapakivii granite and syenite intruded, the pegmatite veins and mafic dyke swarm developed and crosscut all the structural traces, the Yishulazi Group deposited. Meanwhile, the Dabie-Sulu orogen in the south of the eastern block was an intensive active continental margin at a range from 1.7 to 1.6 Ga. After 1.6 Ga, the Dabie-Sulu orogen underwent a series of crust reworking, evidently differentiating from the major eastern block. In summary, the tectono-thermal evolution in the crust is dominated by the underplating style, collisional processes and delamination types in the deep lithosphere.
Persistent Identifierhttp://hdl.handle.net/10722/151108
ISSN
2015 SCImago Journal Rankings: 0.552
References

 

DC FieldValueLanguage
dc.contributor.authorLi, Sen_US
dc.contributor.authorHao, Den_US
dc.contributor.authorHan, Zen_US
dc.contributor.authorZhao, Gen_US
dc.contributor.authorSun, Men_US
dc.date.accessioned2012-06-26T06:17:09Z-
dc.date.available2012-06-26T06:17:09Z-
dc.date.issued2003en_US
dc.identifier.citationActa Geologica Sinica, 2003, v. 77 n. 3, p. 339-357en_US
dc.identifier.issn0001-5717en_US
dc.identifier.urihttp://hdl.handle.net/10722/151108-
dc.description.abstractNew data obtained over the past few years indicate that the North China Craton consisted of the eastern and western blocks that collided along Trans-North China Orogen at 1.85 Ga. Before the collision, the western margin of the eastern block was active continental margin that has been studied in detail. However, the Paleoproterozoic Jiao-Liao-Ji orogenic belt in the eastern margin of the eastern block has received little attention. New multi-disciplinary study indicates that the tectono-thermal evolution and deep processes in the Jiao-Liao-Ji orogenic belt are summarized as following. The early mantle-plume-related underplating at a range from 2.53 to 2.36 Ga led to the 2.47 ∼ 2.33 Ga intrusion of alkaline granite and malfic dyke swarm, the rifting of the Jiao-Liao-Ji rift and the bi-modal volcanism. The early underplating also resulted in not only sedimentary environments in the rift but also the differentiation of the initial thermal architecture in the crust that controlled different metamorphism types and P-T-t paths in he different part of the rift. The later underplating resulted in the formations of the A-type Liaoji Granites of about 2.17 Ga in the lower crust and the pegmatite of 2.2 Ga and 2.0 Ga, and bedding-parallel deformation. However, the main orogenic deformations occurred at a range from 1.911 to 1.883 Ga accompanying with the high-pressure metamorphism in the southern part of the orogen, the closing of the rift and the compressional deformations. Then, from 1.875 to 1.66 Ga, a little lithospheric blocks were delaminated, anorogenic plutons such as rapakivii granite and syenite intruded, the pegmatite veins and mafic dyke swarm developed and crosscut all the structural traces, the Yishulazi Group deposited. Meanwhile, the Dabie-Sulu orogen in the south of the eastern block was an intensive active continental margin at a range from 1.7 to 1.6 Ga. After 1.6 Ga, the Dabie-Sulu orogen underwent a series of crust reworking, evidently differentiating from the major eastern block. In summary, the tectono-thermal evolution in the crust is dominated by the underplating style, collisional processes and delamination types in the deep lithosphere.en_US
dc.languageengen_US
dc.relation.ispartofActa Geologica Sinicaen_US
dc.subjectDeep Processesen_US
dc.subjectDelaminationen_US
dc.subjectPaleoproterozoicen_US
dc.subjectTectono-Thermal Evolutionen_US
dc.subjectUnderplatingen_US
dc.titlePaleoproterozoic deep processes and tectono-thermal evolution in the Jiao-Liao Massifen_US
dc.typeArticleen_US
dc.identifier.emailZhao, G:gzhao@hkucc.hku.hken_US
dc.identifier.emailSun, M:minsun@hku.hken_US
dc.identifier.authorityZhao, G=rp00842en_US
dc.identifier.authoritySun, M=rp00780en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.scopuseid_2-s2.0-0141459818en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0141459818&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume77en_US
dc.identifier.issue3en_US
dc.identifier.spage339en_US
dc.identifier.epage357en_US
dc.publisher.placeChinaen_US
dc.identifier.scopusauthoridLi, S=8784176300en_US
dc.identifier.scopusauthoridHao, D=8620949400en_US
dc.identifier.scopusauthoridHan, Z=8284175100en_US
dc.identifier.scopusauthoridZhao, G=7403296321en_US
dc.identifier.scopusauthoridSun, M=25932315800en_US

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