Orogeny and relative plate motions

Example of the Japanese Islands

Shigenori Maruyama, Tetsuzo Send

Research output: Contribution to journalArticle

331 Citations (Scopus)

Abstract

The paleogeography of the eastern margin of Asia, near Japan, for the past 250 Ma has been reconstructed on the basis of the relative motions between the oceanic plates and the Eurasian plate (Engebretson et al., 1982) and on-land geology. The relationships between the plate kinematics and orogeny are as follows:. Calc-alkaline magmatism is related to the presence of subduction. When a plate boundary is a transform fault, there is no volcanism. Very slow convergence rates do not give rise to magmatism. Migration of RFT-type triple junctions or ridge subduction produces forearc volcanism near the trench, and also a wider volcanic zone. Uplift of low-P/T-type regional metamorphic belts is related to collision episodes. The uplift of the high-P/T blueschist belts, on the contrary, is not contemporaneous with them. They appear to be related to the start of the subduction of a young plate after the migration of an RFT-type triple junction. Because the formation of a voluminous accretionary complex is contemporaneous with this, and thrusting of this young accretionary complex beneath the uplifted metamorphic belt is often observed, the underplating of the young accretionary complex beneath the older accretionary complex would be the cause of the uplift of the high P/T-type metamorphic belt. The subduction of a young plate would thus be an important factor causing these orogenic events. Highly oblique convergence also results in formation of a serpentinite mélange zone with fragments of blueschists, presumably along a mechanical plate boundary in the forearc.

Original languageEnglish
Pages (from-to)305-329
Number of pages25
JournalTectonophysics
Volume127
Issue number3-4
DOIs
Publication statusPublished - Aug 1 1986
Externally publishedYes

Fingerprint

plate motion
orogeny
subduction
blueschist
triple junction
uplift
plate boundary
magmatism
volcanism
transform fault
underplating
serpentinite
Eurasian plate
paleogeography
trench
kinematics
collision
geology
young
ridges

ASJC Scopus subject areas

  • Earth-Surface Processes
  • Geophysics

Cite this

Orogeny and relative plate motions : Example of the Japanese Islands. / Maruyama, Shigenori; Send, Tetsuzo.

In: Tectonophysics, Vol. 127, No. 3-4, 01.08.1986, p. 305-329.

Research output: Contribution to journalArticle

Maruyama, Shigenori ; Send, Tetsuzo. / Orogeny and relative plate motions : Example of the Japanese Islands. In: Tectonophysics. 1986 ; Vol. 127, No. 3-4. pp. 305-329.
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