Permian-Triassic Magmatism in the Qin-Fang Tectonic Belt, SW China: New Insights into Tectonic Evolution of the Eastern Paleo-Tethys

被引：7

作者：

Zhou, Yun ^{[1
]}

Zhao, Yongshan ^{[1
]}

Cai, Yongfeng ^{[1
]}

Hu, Qiaofan ^{[2
]}

Wang, Ce ^{[3
]}

机构：

[1] Guilin Univ Technol, Collaborat Innovat Ctr Explorat Nonferrous Met Dep, Guangxi Key Lab Hidden Met Ore Deposits Explorat, Guilin 541004, Peoples R China

[2] China Nonferrous Met Guilin Geol & Min Co Ltd, Guilin 541004, Peoples R China

[3] Sun Yat Sen Univ, Sch Marine Sci, Zhuhai 519082, Peoples R China

来源：

JOURNAL OF EARTH SCIENCE | 2023年 / 34卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Paleo-Tethyan ocean; zircon; granite; Permian-Triassic; Qin-Fang tectonic belt; FELSIC IGNEOUS ROCKS; HF-O ISOTOPES; U-PB AGES; SOUTH CHINA; ZIRCON U; GRANITIC COMPLEX; VOLCANIC-ROCKS; SUTURE ZONE; PETROGENESIS; GEOCHEMISTRY;

D O I：

10.1007/s12583-020-1111-6

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The granites of ambiguous geodynamic mechanism in the Qin-Fang tectonic belt (SW China) were studied in detail based on petrological, element geochemical, zircon U-Pb geochronological, and Hf isotopic data. LA-ICPMS U-Pb analyses on zircon yield ages of 248-245 Ma for the granites from the Qin-Fang tectonic belt. The geochemical data show that they are high-K, calc-alkaline, and peraluminous series. Their epsilon Hf(t) values are from -14.01 to -7.75 with two-stage model ages of 1.74-1.43 Ga. These data, integrated with low Al2O3/TiO2, Rb/Sr, Rb/Ba, and (Na2O + K2O)/(FeOT + MgO + TiO2) ratios, and high CaO/Na2O ratios for the granite, suggest an origin from psammite source which was contaminated by mantle-derived components. These observations, in combination with the age data and stratigraphic records in the Jinshajiang, Ailaoshan, and Hainan Island areas suggest that the granites were formed in a post-collision tectonic setting. The Qin-Fang tectonic belt was likely a branched ocean basin of the eastern Paleo-Tethys.

引用

页码：1704 / 1716

页数：13

共 63 条

[1] An oblique subduction model for closure of the Proto-Tethys and Palaeo-Tethys oceans and creation of the Central China Orogenic Belt
Allen, Mark B.
Song, Shuguang
Wang, Chao
Zeng, Renyu
Wen, Tao
[J]. EARTH-SCIENCE REVIEWS, 2023, 240
[2] [Anonymous], 2003, J. Nanjing Univ. (Nat. Sci.)
[3] Neoproterozoic active margin of the SW South China Block: Constraints from U-Pb ages, Sr-Nd isotopes and geochemical data for the gabbro and granodiorite along the Ailaoshan tectonic belt
Cai, Yongfeng
Liu, Huichuan
Feng, Zuohai
Zhou, Yun
Liu, Xijun
Wang, Zilong
Ma, Liyan
Li, Zhenglin
Xu, Jifeng
[J]. LITHOS, 2020, 358
[4] Neoproterozoic subduction along the Ailaoshan zone, South China: Geochronological and geochemical evidence from amphibolite
Cai, Yongfeng
Wang, Yuejun
Cawood, Peter A.
Fan, Weiming
Liu, Huichuan
Xing, Xiaowan
Zhang, Yuzhi
[J]. PRECAMBRIAN RESEARCH, 2014, 245 : 13 - 28
[5] MID-MESOZOIC CLOSURE OF PERMO-TRIASSIC TETHYS AND ITS IMPLICATIONS
CELALSENGOR, AM
[J]. NATURE, 1979, 279 (5714) : 590 - 593
[6] The geochemical and Sr-Nd isotopic characteristics of Paleozoic fractionated S-types granites of north Queensland: Implications for S-type granite petrogenesis
Champion, David C.
Bultitude, Robert J.
[J]. LITHOS, 2013, 162 : 37 - 56
[7] Origin of enclaves in S-type granites of the Lachlan Fold Belt
Chappell, Bruce W.
Wyborn, Doone
[J]. LITHOS, 2012, 154 : 235 - 247
[8] Chappell BW, 1974, PAC GEOL, V8, P173, DOI DOI 10.1046/J.1440-0952.2001.00882.X
[9] Ferromagnesian silicate association in S-type granites: the Darongshan granitic complex (Guangxi, South China)
Charoy, Bernard
Barbey, Pierre
[J]. BULLETIN DE LA SOCIETE GEOLOGIQUE DE FRANCE, 2008, 179 (01): : 13 - 27
[10] Two episodes of the Indosinian thermal event on the South China Block: Constraints from LA-ICPMS U-Pb zircon and electron microprobe monazite ages of the Darongshan S-type granitic suite
Chen, Cheng-Hong
Hsieh, Pei-Shan
Lee, Chi-Yu
Zhou, Han-Wen
[J]. GONDWANA RESEARCH, 2011, 19 (04) : 1008 - 1023

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