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Five foreign scientists including Prof. James Burton Gill came to China to carry out field study of the Tianchi

2014/5/22 18:12:55

At the invitation of Researcher Wei Haiquan of the Key Laboratory of Active Tectonics and Volcano, the Institute of Geology, lifetime honorary professor James Burton Gill from University of California Santa Cruz, Researcher Judith Ellen Fierstein (female) from United States Geological Survey, Associate Prof. Frank C. Ramos from Columbia University, Prof. Yooh Sohyang from Pusan National University and Associate Prof. Awadani from Osaka City University went to the volcano of the Changbai Mountains in Jilin Province for field study from July 30 to August 3, 2013.

Accompanied by three people of the Institute of Geology including Researcher Wei Haiquan, they conducted field study of the Tianchi volcano. The duration of the study is from July 30 to August 2, 2013. The contents of the study are the continuity and deepening of Route B8 studied after the IAVECI 2013 Conference: including lava flow distribution from the meteorological station at the mountain road of the northern slope; N-NE slope of Tianchi volcano, i.e.: Baiyan Peak – trachyte periods of the crater rim on the No. 6 boundary in the cone forming stage and pumice accumulation and periods of the crater rim; Tianwen Peak in the north – cone-forming trachyte periods of the crater rim on the first line of Chengchahe, and orange – gray black pumice eruption time and stages of Tianwen Peak Formation; distribution of pyroclastic rocks in Baguanmiao Formation on the water surface of the Tianchi Lake and the range of the latest eruptive materials of Tianchi Volcano; airborne sediment of the Great Millennium Eruption around the Laofangzi Hill on the eastern slope of the Tianchi volcano and sedimentary sequence of the pumice from the Great Millennium Eruption; the formation age and volcanic rock characteristics of a few single-genesis slag cones on the eastern slope of Tianchi; Xiaoshahe on the western slope of Tianchi Volcano – pumice sequence and carbonized wood sedimentation of the Great Millennium Eruption. The range of the study mainly covers trachyte cone-forming eruption sequence of Tianchi Volcano since 0.6 Ma, distribution of intrusive dike in volcanic cone and pyroclastic rock eruption sequence. They discussed magmatic evolution mechanism and physical process of eruption of the Tianchi volcano, and chronological issues and research methods of the volcano.

During the study, the volcanologists made sufficient discussion with us while being informed of the eruption history of Tianchi Volcano. The main issues discussed include division of the sequences of pyroclastic rock eruptive materials, the contact relations between the eruptive materials of the Great Millennium Eruption and the eruptive materials of other eruptions, and differentiation of occurrences of eruptive materials controlled by different dynamic principles in the Great Millennium Eruption.

The study coincided with the rainy season of the Tianchi area. The volcanologists showed extraordinary professional dedication in rain and fog. In defiance of the harsh weather, we seized this opportunity of brainstorm, studied this world-famous active volcano and reached an intention for further cooperation in in-depth research of the issues concerning Tianchi volcano.

This study also attracted attention of domestic media. China Central Television covered this study in the whole course and broadcast “Changbai Mountain Field Study Diary” in Live News program in the nights of September 4~6.