File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.precamres.2019.105530
- Scopus: eid_2-s2.0-85074747393
- WOS: WOS:000510527900003
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: Zircon U–Pb ages and Hf isotopes of the Huai’an gneisses from the Tianzhen-Xinpingbu area: Implications for the tectonic evolution of the Trans-North China Orogen
Title | Zircon U–Pb ages and Hf isotopes of the Huai’an gneisses from the Tianzhen-Xinpingbu area: Implications for the tectonic evolution of the Trans-North China Orogen |
---|---|
Authors | |
Keywords | Huai'an gneiss complex Neoarchean North China Craton Paleoproterozoic Subduction and collision |
Issue Date | 2020 |
Publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres |
Citation | Precambrian Research, 2020, v. 337, p. article no. 105530 How to Cite? |
Abstract | One of the major advancements in understanding the formation and evolution of the North China Craton was the recognition of a Himalayan-type collisional belt in the central part of the craton, called the Trans-North China Orogen (TNCO), along which two micro-continental blocks, named the Eastern Block and Western Block, joined together to form a coherent craton. However, controversy still remains about the pre-collisional tectonic setting and architectures of the TNCO. In this contribution, field-based zircon U–Pb and Lu-Hf isotopic investigations were carried out on the Huai'an gneisses from the Tianzhen-Xinpingbu area in the northern part of the TNCO. The Huai'an gneisses consist predominantly of tonalitic-trondhjemitic-granodioritic (TTG) gneisses with minor gabbroic, dioritic and granitic gneisses. Our zircon U-Pb results show that the plutonic protoliths of the Huai'an gneisses were emplaced at 2.51–2.40 Ga and experienced a granulite-facies metamorphic event at 1.86–1.80 Ga. The magmatic zircons of these samples yield εHf(t) values from +1.9 to +7.0 and TDM C ages of 2862–2619 Ma. These positive εHf(t) values, associated with the lack of old inherited zircons, suggest the derivation of their precursor magmas from a juvenile crust without contamination of old continental crust. The TDM C model ages indicate that 2.8–2.6 Ga is the best estimation of the mantle extraction time for the source rocks in the Huai'an gneisses, revealing a major period of juvenile crustal growth. Thus it can be inferred that the partial melting of subducted oceanic crust slab produced the magmas of the Huai'an gneisses, which subsequently interacted with overlying mantle wedge during the ascent, suggesting an intra-oceanic arc environment for the Huai'an gneiss complex. Taken together, the development of the Huai'an gneiss complex was involved in a subduction-related magmatic event in an intra-oceanic arc at ~2.5 Ga, followed by collision between the Eastern and Western blocks at ~1.85 Ga. © 2019 Elsevier B.V. |
Persistent Identifier | http://hdl.handle.net/10722/289688 |
ISSN | 2023 Impact Factor: 3.2 2023 SCImago Journal Rankings: 1.589 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | ZHAO, D | - |
dc.contributor.author | Sun, M | - |
dc.contributor.author | DING, A | - |
dc.date.accessioned | 2020-10-22T08:16:02Z | - |
dc.date.available | 2020-10-22T08:16:02Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Precambrian Research, 2020, v. 337, p. article no. 105530 | - |
dc.identifier.issn | 0301-9268 | - |
dc.identifier.uri | http://hdl.handle.net/10722/289688 | - |
dc.description.abstract | One of the major advancements in understanding the formation and evolution of the North China Craton was the recognition of a Himalayan-type collisional belt in the central part of the craton, called the Trans-North China Orogen (TNCO), along which two micro-continental blocks, named the Eastern Block and Western Block, joined together to form a coherent craton. However, controversy still remains about the pre-collisional tectonic setting and architectures of the TNCO. In this contribution, field-based zircon U–Pb and Lu-Hf isotopic investigations were carried out on the Huai'an gneisses from the Tianzhen-Xinpingbu area in the northern part of the TNCO. The Huai'an gneisses consist predominantly of tonalitic-trondhjemitic-granodioritic (TTG) gneisses with minor gabbroic, dioritic and granitic gneisses. Our zircon U-Pb results show that the plutonic protoliths of the Huai'an gneisses were emplaced at 2.51–2.40 Ga and experienced a granulite-facies metamorphic event at 1.86–1.80 Ga. The magmatic zircons of these samples yield εHf(t) values from +1.9 to +7.0 and TDM C ages of 2862–2619 Ma. These positive εHf(t) values, associated with the lack of old inherited zircons, suggest the derivation of their precursor magmas from a juvenile crust without contamination of old continental crust. The TDM C model ages indicate that 2.8–2.6 Ga is the best estimation of the mantle extraction time for the source rocks in the Huai'an gneisses, revealing a major period of juvenile crustal growth. Thus it can be inferred that the partial melting of subducted oceanic crust slab produced the magmas of the Huai'an gneisses, which subsequently interacted with overlying mantle wedge during the ascent, suggesting an intra-oceanic arc environment for the Huai'an gneiss complex. Taken together, the development of the Huai'an gneiss complex was involved in a subduction-related magmatic event in an intra-oceanic arc at ~2.5 Ga, followed by collision between the Eastern and Western blocks at ~1.85 Ga. © 2019 Elsevier B.V. | - |
dc.language | eng | - |
dc.publisher | Elsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/precamres | - |
dc.relation.ispartof | Precambrian Research | - |
dc.subject | Huai'an gneiss complex | - |
dc.subject | Neoarchean | - |
dc.subject | North China Craton | - |
dc.subject | Paleoproterozoic | - |
dc.subject | Subduction and collision | - |
dc.title | Zircon U–Pb ages and Hf isotopes of the Huai’an gneisses from the Tianzhen-Xinpingbu area: Implications for the tectonic evolution of the Trans-North China Orogen | - |
dc.type | Article | - |
dc.identifier.email | Sun, M: minsun@hku.hk | - |
dc.identifier.authority | Sun, M=rp00780 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.precamres.2019.105530 | - |
dc.identifier.scopus | eid_2-s2.0-85074747393 | - |
dc.identifier.hkuros | 317261 | - |
dc.identifier.volume | 337 | - |
dc.identifier.spage | article no. 105530 | - |
dc.identifier.epage | article no. 105530 | - |
dc.identifier.isi | WOS:000510527900003 | - |
dc.publisher.place | Netherlands | - |
dc.identifier.issnl | 0301-9268 | - |