Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials
In this paper, we focus on the geological features of volcanic edifices and the geochemistry of intermediate–basic volcanic rocks of Shaerbuti Mountain, which offer a new perspective on recycled materials in the study area. The Shaerbuti volcanic rocks consist of calc-alkali basalt and andesite form...
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MDPI AG
2023-01-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/1/75 |
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| author | Jinheng Sun Ni Li Cheng Dong Yanhong Ren |
| author_facet | Jinheng Sun Ni Li Cheng Dong Yanhong Ren |
| author_sort | Jinheng Sun |
| collection | DOAJ |
| description | In this paper, we focus on the geological features of volcanic edifices and the geochemistry of intermediate–basic volcanic rocks of Shaerbuti Mountain, which offer a new perspective on recycled materials in the study area. The Shaerbuti volcanic rocks consist of calc-alkali basalt and andesite formed in an arc setting. The porphyroclastic texture of basalt, explosive breccia rock, and the distribution of both breccia and agglomerate provide robust evidence that a volcanic edifice exists in Shaerbuti Mountain. Based on geochemical features, the Shaerbuti volcanic rocks have been identified as being of two types. Type I volcanic rocks have light rare earth element (LREE)-enriched patterns, with La/Sm ratios of 2.27–4.03, Th/Yb ratios of 0.50–1.46, and Nb/Yb ratios of 1.11–2.28. Type II volcanic rocks display a flat rare earth element (REE) pattern, with La/Sm ratios ranging from 1.83 to 2.43, Th/Yb ratios ranging from 0.24 to 0.45, and Nb/Yb ratios ranging from 0.87 to 0.93. In the studied rocks, MgO-Cr, MgO-Ni and MgO-CaO present a positive relationship, which indicates clinopyroxenes crystallized. The Sr-Nd-Pb isotopic compositions of these basalts present values of 0.7045 to 0.7063 ((<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub>), 6.4 to 6.6 (εNd(t)), and 17.1300 to 18.3477 ((<sup>206</sup>Pb/<sup>204</sup>Pb)<sub>i</sub>), respectively. According to Sr-Nd-Pb isotope features, we argue that melts of altered oceanic crust and sediments were incorporated into the source. We also evaluate the water content (0.55%–6.72%) of the studied volcanic rocks. |
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| spelling | doaj.art-c74dbf5eb03f463db9f240fda70fd7c92023-11-30T23:39:27ZengMDPI AGMinerals2075-163X2023-01-011317510.3390/min13010075Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of MaterialsJinheng Sun0Ni Li1Cheng Dong2Yanhong Ren3Key Laboratory of Seismic and Volcanic Hazards, China Earthquake Administration, Beijing 100029, ChinaKey Laboratory of Seismic and Volcanic Hazards, China Earthquake Administration, Beijing 100029, ChinaHebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, ChinaHebei Key Laboratory of Geotechnical Engineering Safety and Deformation Control, Hebei University of Water Resources and Electric Engineering, Cangzhou 061001, ChinaIn this paper, we focus on the geological features of volcanic edifices and the geochemistry of intermediate–basic volcanic rocks of Shaerbuti Mountain, which offer a new perspective on recycled materials in the study area. The Shaerbuti volcanic rocks consist of calc-alkali basalt and andesite formed in an arc setting. The porphyroclastic texture of basalt, explosive breccia rock, and the distribution of both breccia and agglomerate provide robust evidence that a volcanic edifice exists in Shaerbuti Mountain. Based on geochemical features, the Shaerbuti volcanic rocks have been identified as being of two types. Type I volcanic rocks have light rare earth element (LREE)-enriched patterns, with La/Sm ratios of 2.27–4.03, Th/Yb ratios of 0.50–1.46, and Nb/Yb ratios of 1.11–2.28. Type II volcanic rocks display a flat rare earth element (REE) pattern, with La/Sm ratios ranging from 1.83 to 2.43, Th/Yb ratios ranging from 0.24 to 0.45, and Nb/Yb ratios ranging from 0.87 to 0.93. In the studied rocks, MgO-Cr, MgO-Ni and MgO-CaO present a positive relationship, which indicates clinopyroxenes crystallized. The Sr-Nd-Pb isotopic compositions of these basalts present values of 0.7045 to 0.7063 ((<sup>87</sup>Sr/<sup>86</sup>Sr)<sub>i</sub>), 6.4 to 6.6 (εNd(t)), and 17.1300 to 18.3477 ((<sup>206</sup>Pb/<sup>204</sup>Pb)<sub>i</sub>), respectively. According to Sr-Nd-Pb isotope features, we argue that melts of altered oceanic crust and sediments were incorporated into the source. We also evaluate the water content (0.55%–6.72%) of the studied volcanic rocks.https://www.mdpi.com/2075-163X/13/1/75oceanic crust and sedimentsclinopyroxenearcShaerbuti Mountain |
| spellingShingle | Jinheng Sun Ni Li Cheng Dong Yanhong Ren Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials Minerals oceanic crust and sediments clinopyroxene arc Shaerbuti Mountain |
| title | Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials |
| title_full | Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials |
| title_fullStr | Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials |
| title_full_unstemmed | Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials |
| title_short | Geochemical Features of Volcanic Rocks from the Shaerbuti Mountain Complex, West Junggar, Xinjiang, China: Implications for Recycling of Materials |
| title_sort | geochemical features of volcanic rocks from the shaerbuti mountain complex west junggar xinjiang china implications for recycling of materials |
| topic | oceanic crust and sediments clinopyroxene arc Shaerbuti Mountain |
| url | https://www.mdpi.com/2075-163X/13/1/75 |
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