The geochemical consequences of mixing melts from contrast sources beneath the Jiaodebushan and Xiaogushan volcanoes, Wudalianchi volcanic field, Northeast China
- 1Institute of the Earth's Crust of Russian Academy of Science, Siberian Branch, Irkutsk, Russian Federation (ty@crust.irk.ru)
- 2Institute of Natural Resources And Ecology, Heilongjiang Academy of Science, Harbin, Heilongjiang, China
- 3Irkutsk State University, Irkutsk, Russian Federation
Potassic rocks from the Wudalianchi field are considered by some authors as derivatives of the mantle transition layer. However, this opinion is contradicted by the contrasting component composition of melts erupted in different volcanoes. From data of lead isotope compositions, the initial eruptions of lava flows 2.5–2.0 Ma ago were derived from the lithospheric Laoshantou and Gelaqiu model sources of about 1.88 Ga, while subsequent eruptions were derived from the Wohu source of about 0.15 Ga and the recent Molabu source (Rasskazov et al., 2020). Detailed sampling of volcanoes yielded geochemical evidence on both the individualization of sources beneath volcanoes and mixing of melts from contrasting sources. We present evidence on mixing of melts from the Gelaqiu, Wuhu, and Molabu sources beneath the Jiaodebushan Volcano and partial similarity of rock components from this volcano to material erupted in the Xiaogushan Volcano.
This work is supported by the RSF grant 18-77-10027.
Rasskazov S., Sun Y-M., Chuvashova I., Yasnygina T., Yang C., Xie Z., Saranina E., Gerasimov N., Vladimirova T. Trace-element and Pb isotope evidence on extracting sulfides from potassic melts beneath Longmenshan and Molabushan volcanoes, Wudalianchi, Northeast China. Minerals. 2020. V. 10: 319; doi:10.3390/min10040319
How to cite: Yasnygina, T., Sun, Y., Rasskazov, S., Chuvashova, I., Yang, C., Xie, Z., and Ivanova, V.: The geochemical consequences of mixing melts from contrast sources beneath the Jiaodebushan and Xiaogushan volcanoes, Wudalianchi volcanic field, Northeast China, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-3803, https://doi.org/10.5194/egusphere-egu21-3803, 2021.
