Knowledge Management System Of Guangzhou Institute of Geochemistry，CAS
Xue, Shuo1,2,7; Zhang, Wanzhu3; Ling, Ming-Xing3; Sun, Weidong4,5; Ding, Xing6
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| Large-Scale Cretaceous Adakitic Magmatism Induced by Water-Fluxed Melting of Continental Crust during the North China Craton Destruction | |
| Source Publication | JOURNAL OF PETROLOGY
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| ISSN | 0022-3530 |
| 2023-09-01 | |
| Volume | 64Issue:9Pages:15 |
| DOI | 10.1093/petrology/egad066 |
| Language | 英语 |
| WOS Research Area | Geochemistry & Geophysics |
| Abstract | The mechanism behind the destabilization of the North China Craton (NCC) remains a contentious topic among researchers. Large-scale Cretaceous adakitic magmatism in the NCC offers insights into the decratonization process. This study focuses on the Huashan and Laoniushan plutons located in the Lesser Qinling on the southern margin of the NCC and compiles published data for coeval adakitic rocks to investigate the role of water in adakitic rock petrogenesis during the peak destruction of NCC. Both the Huashan and Laoniushan plutons exhibit adakitic signatures, including high Sr (193-1080 ppm), low Yb (<14.8 ppm) and Y (<1.24 ppm) concentrations, as well as high Sr/Y (18-100) and La/Yb (24-58) ratios. The zircon Hf-O isotope compositions suggest that the primary source for the Huashan and Laoniushan plutons is the mafic lower crust of NCC. Nevertheless, there are significant differences in trace element characteristics between the two plutons. Specifically, the Huashan pluton displays higher Na2O/K2O ratios, lower levels of Rb, Rb/Sr, Nb, Ta content, and a weak Eu anomaly in comparison to the Laoniushan pluton. These variations in geochemical attributes cannot be accounted for by mechanisms like mantle-derived magma mixing, crustal contamination, or fractional crystallization processes. Instead, these disparities are attributed to distinct modes of crustal anatexis, involving both water-fluxed and dehydration melting. Subsequently, we conducted thermodynamic simulations of the melting process of mafic lower crust under different pressure (0.5-1.5 GPa) and water content conditions (1-3 wt.%). The simulation results suggest that the Huashan pluton is most likely formed through water-fluxed melting in a scenario with normal crustal thickness (1 GPa). On the other hand, the Laoniushan pluton might have originated from dehydration melting under normal crustal thickness and pressure conditions. Notably, high pressure (>1.5 GPa) is not necessary for the formation of intracontinental adakitic rocks. The release of water from metasomatized lithospheric mantle and subsequent hydration of the lower continental crust triggers extensive adakitic magmatism in the NCC. These findings emphasize the significance of deep water cycling in understanding large-scale magmatic events and illuminate the decratonization mechanism. |
| Keyword | water fluxed melting North China Craton (NCC) adakitic rocks deep water cycle decratonization |
| WOS ID | WOS:001075164000001 |
| Indexed By | SCI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.gig.ac.cn/handle/344008/74900 |
| Collection | 中国科学院矿物学与成矿学重点实验室 |
| Corresponding Author | Xue, Shuo; Ling, Ming-Xing |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Geochem, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Peoples R China 2.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China 3.East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 5.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 6.Chinese Acad Sci, Guangzhou Inst Geochem, State Key Lab Isotope Geochem, Guangzhou 510640, Peoples R China 7.511 Kehua St, Guangzhou 510640, Peoples R China |
| Recommended Citation GB/T 7714 | Xue, Shuo,Zhang, Wanzhu,Ling, Ming-Xing,et al. Large-Scale Cretaceous Adakitic Magmatism Induced by Water-Fluxed Melting of Continental Crust during the North China Craton Destruction[J]. JOURNAL OF PETROLOGY,2023,64(9):15. |
| APA | Xue, Shuo,Zhang, Wanzhu,Ling, Ming-Xing,Sun, Weidong,&Ding, Xing.(2023).Large-Scale Cretaceous Adakitic Magmatism Induced by Water-Fluxed Melting of Continental Crust during the North China Craton Destruction.JOURNAL OF PETROLOGY,64(9),15. |
| MLA | Xue, Shuo,et al."Large-Scale Cretaceous Adakitic Magmatism Induced by Water-Fluxed Melting of Continental Crust during the North China Craton Destruction".JOURNAL OF PETROLOGY 64.9(2023):15. |
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