Manus Plate
editThe Manus Plate is a 100-km mircoplate located northeast of New Guinea. The Manus Plate was formed in between the North Bismark Plate and the South Bismark Plate. The Manus Plate currently rotates counter-clockwise in the Melanesia area[1].
Formation
editThe Manus Plate formed during the Brunhes chron, making its maximum age 780,000 years old [2]. The Manus Plate formed in-between and on top of the transform boundaries that were separating the North and South Bismark plates [2]. The plate was formed of young mid-ocean ridge basalt, along with pieces of older oceanic floor that had broken off of the South Bismarck plate [2].
Boundaries and Movement
editThe north and northeast boundaries of the Manus Plate, with the North Bismark and Pacific plates are both convergent boundaries [3]. The plates southeast borders of the South Bismark plate is a divergent boundary [3]. The southwest boundary bordering the South Bismark plate is a transform boundary. The Manus plate currently has a rate of rotation of 51°/ Ma at the spot, -3.04°N, 150.46°E, in the counter-clockwise direction, due to left lateral motion [2]. This is likely the fastest plate rotation, on Earth at this time [4].
References
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- ^ Bird, Peter (March 14 2003). "An Updated Model of Plate Boundaries". Geochemistry, Geophysics, Geosystems. 4.
{{cite journal}}: Check date values in:|date=(help) - ^ Lamonthe, Caroline. "Caroline, North Bismark, Manus, South Bismark". Retrieved March 12 2020.
{{cite web}}: Check date values in:|access-date=(help)CS1 maint: url-status (link) - ^ "ODP Leg 193: Anatomy of an Active, Felsic-Hosted Hydrothermal System, Eastern Manus Basin". Retrieved March 18 2020.
{{cite web}}: Check date values in:|access-date=(help)CS1 maint: url-status (link) - ^ Martinez, Fernando; Taylor, Brian (June 1996). "Backarc spreading, rifting, and microplate rotation, between transform faults in the Manus Basin". Marine Geophysical Researches. 18: 2–4.