Evolution of the Ciomadul Volcanic Field—Lava Domes and Explosive Eruptions

Yanshan and Gaoshan,two Holocene volcanoes in the Halaha River and Chaoer River volcanic cluster,are different from volcanoes with Strombolian eruption.Their early-stage eruptions produced pyroclasts which formed scoria cone,tephra fall-out sheet and small-scale pyroclastic flow,while the late stage eruptions effused a great amount of lava.They have large cones with the elevation above 200～300 meters,and the cones are made up of cinder cone and spatter cone.Tephra fall-out sheet is around the cones.The effused lava flow from the two volcanoes underwent the lava type transition from pahoeoe lava to aa lava.According to the characteristics of volcanic products,the eruption style is presented as follows:explosive eruption with a sustained eruption column,Strombolian eruption,lava fountain eruption.The sustained eruption column characterizes the new style and makes it different from typical Strombolian eruption.The similar eruption as Yanshan and Gaoshan happened in Longgang Quaternary volcanic cluster and Holocene volcanic cluster in Jingbohu.It is a new eruption style in the continental volcanism in China.

Strombolian eruption

Effusive eruption

Cinder cone

Dense-rock equivalent

Peléan eruption

Volcanic plateau

Scoria

Phreatic eruption

Lateral eruption

Source

Cite

Citations (3)

Volcanic eruption features of Laoheishan and Huoshaoshan in Wudalianchi

Global geology (2009)

Zhang Lichen

By research with field investigation and observation records of volcanic eruption,combining with the achievement in volcanic research home and abroad,the authors discuss the volcanic eruption features of Laoheishan and Huoshaoshan in Wudalianchi of Heilongjiang,China in volcanic genetic type,eruption mode,eruption symptom and other aspects,and point out that the Laoheishan and Huoshaoshan volcanoes are monogenetic in genetic type,the eruption mode is not a simple way of central eruption,but experienced fission eruption turn to central eruption.Through the analysis of volcanic eruption observational record and the comparison with foreign volcanoes,it is revealed that this volcanic eruption possesses precursor which features benefit the monitor and forecast future volcanic eruption.

Peléan eruption

Dense-rock equivalent

Vulcanian eruption

Effusive eruption

Lateral eruption

Phreatic eruption

Source

Cite

Citations (1)

Lava field evolution and emplacement dynamics of the 2014–2015 basaltic fissure eruption at Holuhraun, Iceland

Journal of Volcanology and Geothermal Research (2017)

Gro B. M. Pedersen Ármann Höskuldsson Tobias Dürig T. Thórdarson Ingibjörg S. Jónsdóttir