Baikal Rift Zone

Map of the Lake Baikal Rift Zone from the USGS factsheet

The Baikal Rift Zone is a divergent plate boundary centered beneath Lake Baikal in southeastern Russia. To its west is the Eurasian Plate and to its east is the Amur Plate which is moving away from the rift toward Japan at about 4 mm per year.

As in all divergent plate boundary zones, the crust in the Baikal Rift Zone is thinning and magma is very close to the surface. Hot springs are present both on land and under Lake Baikal, although thus far, no evidence of actual volcanism has been found in the immediate vicinity of the lake. However, geologically-recent volcanic activity has occurred nearby and is probably associated with the Baikal Rift Zone. These volcanic centers are the Udokan Plateau^[1], located about 400 km ENE of the northern tip of Lake Baikal, and the Oka Plateau^[2], located about 200 km WNW of the southwest tip of Lake Baikal.

Interpreted seismic reflection profile across Lake Baikal from the USGS factsheet

References

• "Structure and Evolutionary Stages of the Baikal Rift", in Tectonics, International Geological Congress Staff, 27th International Geological Congress, Published 1984 by VSP

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