 |
 |
by Mitch Battros - Earth Changes Media September 25th, 2013
|
|
***See note from Mitch (bottom) A new study presents new seismic and well data from the rifted margin of Pakistan in the northern Arabian Sea. Data was used to assess the role of hot astheno-spheric mantle and plume processes in the formation of this margin. |
|
The timing and location of this margin segment suggest a link between margin formation and the emplacement of the Deccan Traps flood basalt province - which are usually interpreted to be the product of melting from a new plume head striking the base of the India/Pakistan border. |
|
A recent similar occurrence: Isotope data on volcanic rocks recovered from the submarine Monowai volcanic center. They consisted of hydrothermally active caldera and a high volcanically and hydrothermally active stratovolcano. |
|
The caldera lavas range from basalt to andesite, with the compositional variation being consistent with fractional crystallization. Crystallization indicates mineral composition is associated with mantle plumes. |
|
Upgraded 7.2 Magnitude Earthquake Hits Peru |
Some homes crumbled and a tsunami warning was issued after a 7.2 earthquake struck just off Peru's southern coast. The impact caused buildings in the Peruvian capital, Lima, to shake, despite the city being 480 kilometers away. Tsunami warming has been cancelled. |
|
The quake struck just 80 kilometers from the nearest Peruvian city, Acari, according to the US Geological Survey, with its epicenter at a depth of 33 kilometers. The quake had originally been measured at a magnitude of 6.8. While no deaths or injuries were immediately reported, homes in the province of Caraveli in Arequipa crumbled in the shock.
Comments