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Article: Early Mesozoic unroofing pattern of the Dabie Mountains (China): Constraints from the U-Pb detrital zircon geochronology and Si-in-white mica analysis of synorogenic sediments in the Jianghan Basin
Title | Early Mesozoic unroofing pattern of the Dabie Mountains (China): Constraints from the U-Pb detrital zircon geochronology and Si-in-white mica analysis of synorogenic sediments in the Jianghan Basin | ||||||||||
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Authors | |||||||||||
Keywords | Dabie HP-UHP rocks Early Mesozoic synorogenic sediments Jianghan basin Si-in-white mica Yangtze basement supply Zircon U-Pb geochronology | ||||||||||
Issue Date | 2009 | ||||||||||
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | ||||||||||
Citation | Chemical Geology, 2009, v. 266 n. 3-4, p. 240-250 How to Cite? | ||||||||||
Abstract | This paper presents the results of an integrated U-Pb detrital zircon geochronology and Si-in-white mica analysis for synorogenic sediments in the Jianghan Basin to the south of the Dabie Orogen. The results provide an improved understanding of the provenance of these sediments and the unroofing pattern of the early Mesozoic Dabie Mountain. Si contents of detrital white micas range from 3.09 to 3.34 atoms pfu for the upper Triassic sandstones whereas 3.06 to 3.59 atoms pfu for the lower and middle Jurassic sandstones. The majority of detrital white micas in the lower Jurassic sandstones is phengitic and originated exclusively from the Dabie high- to ultrahigh- pressure rocks. The U-Pb dating results of the detrital zircons for seven samples suggest that these synorogenic sediments have a significant change of provenance from late Triassic to early and middle Jurassic. For the upper Triassic sandstone, the U-Pb age clusters of these zircons are characterized by ~ 420-450 Ma, ~ 750-820 Ma, ~ 1050-1200 Ma and ~ 2500 Ma with minor Luliangian (~ 1700-2000 Ma) components. In contrast, the zircon ages of the Jurassic sandstones are dominated by the Luliangian (~ 1700-2000 Ma) ages with only minor Caledonian (~ 420-450 Ma) and Greenville (~ 1050-1200 Ma) ages. In combination with other available geological data, it can be concluded that the Dabie HP-UHP rocks might initially be exposed to the surface at the beginning of early Jurassic (~ 190 Ma). The Jiangnan terrain (also named "Jiangnan old continental in Chinese) to the south of the Jianghan basin provided the predominant supply of upper Triassic sediments, whereas the Paleoproterozoic Yangtze crustal materials (overlying the present Dabie Complex at the time) were the important provenance of the Jurassic sediments in the Jianghan basin. © 2009 Elsevier B.V. All rights reserved. | ||||||||||
Persistent Identifier | http://hdl.handle.net/10722/151286 | ||||||||||
ISSN | 2021 Impact Factor: 4.685 2020 SCImago Journal Rankings: 1.540 | ||||||||||
ISI Accession Number ID |
Funding Information: We would like to thank Dr. Z-Y Xu for their help during field trip and sample collection. We are grateful to Prof. D. Rickard, S. Gao, and another anonymous reviewer for their critical and constructive review, which led to major improvement of the manuscript. This study was financially supported by projects from the Chinese Academy of Sciences (KZCY2-yw-128, KZCX1-YW-15-1), the Ministry of Science and Technology of China (2007CB411403) and the Nature Sciences Foundation of China (40825009, 40772129) and Opening Foundation of State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, CAS (200704). This is a contribution to NO IS091104 to GIGCAS. | ||||||||||
References |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wang, Y | en_HK |
dc.contributor.author | Zhao, G | en_HK |
dc.contributor.author | Xia, X | en_HK |
dc.contributor.author | Zhang, Y | en_HK |
dc.contributor.author | Fan, W | en_HK |
dc.contributor.author | Li, C | en_HK |
dc.contributor.author | Bi, X | en_HK |
dc.contributor.author | Li, S | en_HK |
dc.date.accessioned | 2012-06-26T06:20:06Z | - |
dc.date.available | 2012-06-26T06:20:06Z | - |
dc.date.issued | 2009 | en_HK |
dc.identifier.citation | Chemical Geology, 2009, v. 266 n. 3-4, p. 240-250 | en_HK |
dc.identifier.issn | 0009-2541 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/151286 | - |
dc.description.abstract | This paper presents the results of an integrated U-Pb detrital zircon geochronology and Si-in-white mica analysis for synorogenic sediments in the Jianghan Basin to the south of the Dabie Orogen. The results provide an improved understanding of the provenance of these sediments and the unroofing pattern of the early Mesozoic Dabie Mountain. Si contents of detrital white micas range from 3.09 to 3.34 atoms pfu for the upper Triassic sandstones whereas 3.06 to 3.59 atoms pfu for the lower and middle Jurassic sandstones. The majority of detrital white micas in the lower Jurassic sandstones is phengitic and originated exclusively from the Dabie high- to ultrahigh- pressure rocks. The U-Pb dating results of the detrital zircons for seven samples suggest that these synorogenic sediments have a significant change of provenance from late Triassic to early and middle Jurassic. For the upper Triassic sandstone, the U-Pb age clusters of these zircons are characterized by ~ 420-450 Ma, ~ 750-820 Ma, ~ 1050-1200 Ma and ~ 2500 Ma with minor Luliangian (~ 1700-2000 Ma) components. In contrast, the zircon ages of the Jurassic sandstones are dominated by the Luliangian (~ 1700-2000 Ma) ages with only minor Caledonian (~ 420-450 Ma) and Greenville (~ 1050-1200 Ma) ages. In combination with other available geological data, it can be concluded that the Dabie HP-UHP rocks might initially be exposed to the surface at the beginning of early Jurassic (~ 190 Ma). The Jiangnan terrain (also named "Jiangnan old continental in Chinese) to the south of the Jianghan basin provided the predominant supply of upper Triassic sediments, whereas the Paleoproterozoic Yangtze crustal materials (overlying the present Dabie Complex at the time) were the important provenance of the Jurassic sediments in the Jianghan basin. © 2009 Elsevier B.V. All rights reserved. | en_HK |
dc.language | eng | en_US |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/chemgeo | en_HK |
dc.relation.ispartof | Chemical Geology | en_HK |
dc.rights | Chemical Geology. Copyright © Elsevier BV. | - |
dc.subject | Dabie HP-UHP rocks | en_HK |
dc.subject | Early Mesozoic synorogenic sediments | en_HK |
dc.subject | Jianghan basin | en_HK |
dc.subject | Si-in-white mica | en_HK |
dc.subject | Yangtze basement supply | en_HK |
dc.subject | Zircon U-Pb geochronology | en_HK |
dc.title | Early Mesozoic unroofing pattern of the Dabie Mountains (China): Constraints from the U-Pb detrital zircon geochronology and Si-in-white mica analysis of synorogenic sediments in the Jianghan Basin | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Zhao, G: gzhao@hkucc.hku.hk | en_HK |
dc.identifier.email | Xia, X: xpxia@hotmail.com | en_HK |
dc.identifier.authority | Zhao, G=rp00842 | en_HK |
dc.identifier.authority | Xia, X=rp00815 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/j.chemgeo.2009.06.012 | en_HK |
dc.identifier.scopus | eid_2-s2.0-68749084872 | en_HK |
dc.identifier.hkuros | 159550 | - |
dc.relation.references | http://www.scopus.com/mlt/select.url?eid=2-s2.0-68749084872&selection=ref&src=s&origin=recordpage | en_HK |
dc.identifier.volume | 266 | en_HK |
dc.identifier.issue | 3-4 | en_HK |
dc.identifier.spage | 240 | en_HK |
dc.identifier.epage | 250 | en_HK |
dc.identifier.isi | WOS:000270346400012 | - |
dc.publisher.place | Netherlands | en_HK |
dc.identifier.scopusauthorid | Wang, Y=36496272800 | en_HK |
dc.identifier.scopusauthorid | Zhao, G=7403296321 | en_HK |
dc.identifier.scopusauthorid | Xia, X=35241486400 | en_HK |
dc.identifier.scopusauthorid | Zhang, Y=37048183700 | en_HK |
dc.identifier.scopusauthorid | Fan, W=7401635313 | en_HK |
dc.identifier.scopusauthorid | Li, C=8953042200 | en_HK |
dc.identifier.scopusauthorid | Bi, X=7102242579 | en_HK |
dc.identifier.scopusauthorid | Li, S=8784176300 | en_HK |
dc.identifier.issnl | 0009-2541 | - |