Revisiting the high temperature Darongshan-Shiwandashan granitoids in the South China: A response to slab tearing associated with diachronous collision between Indochina and South China blocks
文献类型：期刊论文
| 作者 | Yue, Yu-Fan1,4,5,6; Xia, Xiao-Ping3,5; Li, Pengfei1,6 ; He, Bin1,6; Peng, Touping1,6; Sun, Min2; Xu, Jian1,6; Prasanth, M. P. Manu3,5
|
| 刊名 | LITHOS
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 494-495页码:16 |
| 关键词 | S-type granite Darongshan Slab tearing Diachronous collision Indosinian orogeny |
| ISSN号 | 0024-4937 |
| DOI | 10.1016/j.lithos.2024.107898 |
| 英文摘要 | The Darongshan-Shiwandashan granite belt (DSGB) is composed of S-type granites and granodiorite intrusions, which are characterized by high- or ultrahigh-temperature cordierite, orthopyroxene, and granulite xenoliths. The petrogenesis of these plutons is a subject of debate, and a thorough overview of regional tectonic evolution and geochemistry is still absent despite the numerous research conducted in this granite belt. This study is a comprehensive overview of geochronology, whole-rock major-trace elements, Sr-Nd isotopes, and zircon Hf-O isotopes in the DSGB, focusing on their petrogenesis and tectonic setting of formation. The geochronological data indicates that DSGB granitoids emplaced at ca. 250 Ma, with a southwestward-younging trend. Moreover, mineral assemblages of cordierite + orthopyroxene suggest that the DSGB was formed in a high-temperature (similar to 850 degrees C) and low-pressure (3.7-6 kbar) tectonic setting. Three main plutons (Darongshan, Jiuzhou, and Taima) of the DSGB exhibit distinctly different compositions. The Darongshan and Taima granitoids display high silica (SiO2 = 68.65-78.10 wt%), low-maficity (FeO + MgO = 1.97-7.28 wt%), along with negative whole-rock epsilon Nd(t) values (-13.9 to -9.7) and elevated initial Sr-87/Sr-86 values (0.71638 to 0.73165). The Jiuzhou granitoids, on the other hand, exhibit relatively low silica (SiO2 = 63.90-72.72 wt%) and high maficity (FeO + MgO = 3.03-9.88 wt%), with largely overlapping but relatively high epsilon Nd(t) values ranging from -12.9 to -9.9 and lower initial Sr-87/Sr-86 values from 0.71453 to 0.72401. Two-component mixing model results indicate these different compositions represent varying degrees of mixing between crust- and mantle-derived magmas, with 0-10 %, 0-20 % and 20-40 % basaltic melts involved for Taima, Darongshan and Jiuzhou plutons, respectively. The subducting slab tearing, induced by the diachronous collision between the South China Block (SCB) and Indochina Block (ICB), provide the most feasible interpretation for the petrogenesis and spatio-temporal geochemical pattern of the granitic rocks in the DSGB. The onset of the diachronous collision initiated at the Hainan-Yunkai massif, southwest of SCB, while the Tethys Ocean still existed in the northwest (Nanpanjiang area), causing notable disparities in the convergence velocities of the subducting ocean slab. The heterogeneous stresses resulting from the different subduction rates were accommodated by bending and tearing of the subducting slab. Then, ultrahigh-temperature basaltic melts derived from the decompression melting of the lithospheric mantle facilitated the melting of metasedimentary rocks, which resulted in the formation of high-temperature S-type granitoids. The Jiuzhou pluton, located at the center of slab tearing, received more mantle contributions than the Darongshan and the Taima plutons, which are emplaced away from the slab tearing center. The younging trend in age from the Darongshan to Jiuzhou and Taima plutons indicates a progressive tearing from the northeast (the far end of the subducting slab) to the southwest. |
| WOS研究方向 | Geochemistry & Geophysics ; Mineralogy |
| 语种 | 英语 |
| WOS记录号 | WOS:001381836600001 |
| 源URL | [http://ir.gig.ac.cn/handle/344008/81893]  |
| 专题 | 同位素地球化学国家重点实验室 |
| 通讯作者 | Xia, Xiao-Ping |
| 作者单位 | 1.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 2.Univ Hong Kong, Dept Earth Sci, Hong Kong, Peoples R China 3.Yangtze Univ, Coll Resources & Environm, YU CUGW Joint Res Ctr Deep Earth & Surface Dynam C, Wuhan 430100, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China 5.Yangtze Univ, Coll Resources & Environm, Hubei Key Lab Petr Geochem & Environm, Wuhan 430100, Peoples R China 6.Chinese Acad Sci, CAS Ctr Excellence Deep Earth Sci, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yue, Yu-Fan,Xia, Xiao-Ping,Li, Pengfei,et al. Revisiting the high temperature Darongshan-Shiwandashan granitoids in the South China: A response to slab tearing associated with diachronous collision between Indochina and South China blocks[J]. LITHOS,2025,494-495:16. |
| APA | Yue, Yu-Fan.,Xia, Xiao-Ping.,Li, Pengfei.,He, Bin.,Peng, Touping.,...&Prasanth, M. P. Manu.(2025).Revisiting the high temperature Darongshan-Shiwandashan granitoids in the South China: A response to slab tearing associated with diachronous collision between Indochina and South China blocks.LITHOS,494-495,16. |
| MLA | Yue, Yu-Fan,et al."Revisiting the high temperature Darongshan-Shiwandashan granitoids in the South China: A response to slab tearing associated with diachronous collision between Indochina and South China blocks".LITHOS 494-495(2025):16. |
入库方式： OAI收割
来源：广州地球化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。