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Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin

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Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin. / Qi, Liang; Xu, Yajun; Cawood, Peter A.; Wang, Wei; Du, Yuansheng.

In: Lithos, Vol. 324-325, 01.2019, p. 842-858.

Research output: Contribution to journalArticle

Harvard

Qi, L, Xu, Y, Cawood, PA, Wang, W & Du, Y 2019, 'Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin' Lithos, vol. 324-325, pp. 842-858. https://doi.org/10.1016/j.lithos.2018.12.004

APA

Qi, L., Xu, Y., Cawood, P. A., Wang, W., & Du, Y. (2019). Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin. Lithos, 324-325, 842-858. https://doi.org/10.1016/j.lithos.2018.12.004

Vancouver

Qi L, Xu Y, Cawood PA, Wang W, Du Y. Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin. Lithos. 2019 Jan;324-325:842-858. https://doi.org/10.1016/j.lithos.2018.12.004

Author

Qi, Liang ; Xu, Yajun ; Cawood, Peter A. ; Wang, Wei ; Du, Yuansheng. / Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin. In: Lithos. 2019 ; Vol. 324-325. pp. 842-858.

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@article{af4828d8d19a4509a1e151149803187d,
title = "Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin",
abstract = "Mid-Neoproterozoic magmatic rocks from the southeastern part of the Nanhua Basin constrain the tectonic setting of the basin. Data from rhyolitic tuffs of the Louqian Formation that overlie the Cathaysia Block in southeastern South China indicate accumulation of the unit at ca. 770 Ma, and provide an upper age limit on collisional assembly of the Yangtze and Cathaysia blocks. The zircons within the tuffs display largely positive εHf(t) (−3.66 to +13.94) and juvenile TDM (Hf) values (1.74–0.90 Ga), which indicate involvement of Neoproterozoic to late Paleoproterozoic crustal materials in their generation. Geochemically, the tuffs are peraluminous and characterized by both A-type and arc affinities with high SiO2, Ga, accentuated negative Eu anomalies, strong depletion in high field strength elements and high zircon saturation temperatures (TZr), which are comparable to contemporaneous (800–750 Ma) felsic rocks from the northwestern of the Nanhua Basin. These characteristics suggest the Nanhua Basin lay inboard of a convergent plate margin arc. This arc is represented by 860–730 Ma magmatism along the western and northern margin of the South China Craton (Panxi-Hannan Belt), with the Nanhua Basin occupying an upper plate, back arc setting.",
keywords = "Nanhua basin, Mid-Neoproterozoic, Louqian formation, Rhyolite tuff, Back-arc setting",
author = "Liang Qi and Yajun Xu and Cawood, {Peter A.} and Wei Wang and Yuansheng Du",
note = "This work was supported by the National Natural Science Foundation of China (Grant No. 41772106 and 41472086) and by the Australian Research Council (Grant FL160100168).",
year = "2019",
month = "1",
doi = "10.1016/j.lithos.2018.12.004",
language = "English",
volume = "324-325",
pages = "842--858",
journal = "Lithos",
issn = "0024-4937",
publisher = "Elsevier Science BV",

}

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TY - JOUR

T1 - Implications of 770 Ma Rhyolitic Tuffs, eastern South China Craton in constraining the tectonic setting of the Nanhua Basin

AU - Qi, Liang

AU - Xu, Yajun

AU - Cawood, Peter A.

AU - Wang, Wei

AU - Du, Yuansheng

N1 - This work was supported by the National Natural Science Foundation of China (Grant No. 41772106 and 41472086) and by the Australian Research Council (Grant FL160100168).

PY - 2019/1

Y1 - 2019/1

N2 - Mid-Neoproterozoic magmatic rocks from the southeastern part of the Nanhua Basin constrain the tectonic setting of the basin. Data from rhyolitic tuffs of the Louqian Formation that overlie the Cathaysia Block in southeastern South China indicate accumulation of the unit at ca. 770 Ma, and provide an upper age limit on collisional assembly of the Yangtze and Cathaysia blocks. The zircons within the tuffs display largely positive εHf(t) (−3.66 to +13.94) and juvenile TDM (Hf) values (1.74–0.90 Ga), which indicate involvement of Neoproterozoic to late Paleoproterozoic crustal materials in their generation. Geochemically, the tuffs are peraluminous and characterized by both A-type and arc affinities with high SiO2, Ga, accentuated negative Eu anomalies, strong depletion in high field strength elements and high zircon saturation temperatures (TZr), which are comparable to contemporaneous (800–750 Ma) felsic rocks from the northwestern of the Nanhua Basin. These characteristics suggest the Nanhua Basin lay inboard of a convergent plate margin arc. This arc is represented by 860–730 Ma magmatism along the western and northern margin of the South China Craton (Panxi-Hannan Belt), with the Nanhua Basin occupying an upper plate, back arc setting.

AB - Mid-Neoproterozoic magmatic rocks from the southeastern part of the Nanhua Basin constrain the tectonic setting of the basin. Data from rhyolitic tuffs of the Louqian Formation that overlie the Cathaysia Block in southeastern South China indicate accumulation of the unit at ca. 770 Ma, and provide an upper age limit on collisional assembly of the Yangtze and Cathaysia blocks. The zircons within the tuffs display largely positive εHf(t) (−3.66 to +13.94) and juvenile TDM (Hf) values (1.74–0.90 Ga), which indicate involvement of Neoproterozoic to late Paleoproterozoic crustal materials in their generation. Geochemically, the tuffs are peraluminous and characterized by both A-type and arc affinities with high SiO2, Ga, accentuated negative Eu anomalies, strong depletion in high field strength elements and high zircon saturation temperatures (TZr), which are comparable to contemporaneous (800–750 Ma) felsic rocks from the northwestern of the Nanhua Basin. These characteristics suggest the Nanhua Basin lay inboard of a convergent plate margin arc. This arc is represented by 860–730 Ma magmatism along the western and northern margin of the South China Craton (Panxi-Hannan Belt), with the Nanhua Basin occupying an upper plate, back arc setting.

KW - Nanhua basin

KW - Mid-Neoproterozoic

KW - Louqian formation

KW - Rhyolite tuff

KW - Back-arc setting

U2 - 10.1016/j.lithos.2018.12.004

DO - 10.1016/j.lithos.2018.12.004

M3 - Article

VL - 324-325

SP - 842

EP - 858

JO - Lithos

T2 - Lithos

JF - Lithos

SN - 0024-4937

ER -

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ID: 256922835