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Sci Adv. 2016 Apr 15;2(4):e1501513. doi: 10.1126/sciadv.1501513. eCollection 2016 Apr.

Evidence for partial melt in the crust beneath Mt. Paektu (Changbaishan), Democratic People's Republic of Korea and China.

Author information

1
Earthquake Administration, Pyongyang, Democratic People's Republic of Korea.
2
Department of Earth and Planetary Sciences, Birkbeck College, University of London, London WC1E 7HX, UK.
3
Department of Geography, University of Cambridge, Cambridge CB2 3EN, UK.
4
Environmental Education Media Project, Beijing 100025, China.
5
U.S. Geological Survey, Menlo Park, CA 94025, USA.
6
Pyongyang International Information Centre of New Technology and Economy, Pyongyang, Democratic People's Republic of Korea.

Abstract

Mt. Paektu (also known as Changbaishan) is an enigmatic volcano on the border between the Democratic People's Republic of Korea (DPRK) and China. Despite being responsible for one of the largest eruptions in history, comparatively little is known about its magmatic evolution, geochronology, or underlying structure. We present receiver function results from an unprecedented seismic deployment in the DPRK. These are the first estimates of the crustal structure on the DPRK side of the volcano and, indeed, for anywhere beneath the DPRK. The crust 60 km from the volcano has a thickness of 35 km and a bulk V P/V S of 1.76, similar to that of the Sino-Korean craton. The V P/V S ratio increases ~20 km from the volcano, rising to >1.87 directly beneath the volcano. This shows that a large region of the crust has been modified by magmatism associated with the volcanism. Such high values of V P/V S suggest that partial melt is present in the crust beneath Mt. Paektu. This region of melt represents a potential source for magmas erupted in the last few thousand years and may be associated with an episode of volcanic unrest observed between 2002 and 2005.

KEYWORDS:

Partial melt; Seismology; Volcano; crust; receiver function

PMID:
27152343
PMCID:
PMC4846464
DOI:
10.1126/sciadv.1501513
[Indexed for MEDLINE]
Free PMC Article

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