The 1719–1721 eruptions of potassium-rich lavas at Wudalianchi, China |
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| Authors: | Maoseng Feng JL Whitford-Stark |
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| Abstract: | Eruptions between 1719 and 1721 at Wudalianchi produced two monogenetic strombolian cones Laoheishan and Huoshaoshan and the 65 km2 Shilong lava field. The lavas are unusual in that they are leucite-bearing and lack modal plagioclase. Together with the earlier cones, the historic cones form an orthogonal network with a 4-km average separation. Differences in the morphology of the historic cones are attributed to differences in explosivity. The Shilong lava is predominantly pahoehoe (70%), of compound form, and similar to “plains-style” lavas. It is concluded that there is little possibility that an eruption will take place at Wudalianchi in the near future. |
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