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March 31 @ 12:00 pm - 12:50 pm CDT

Who:  Dr. Min Chen & Hehe Jiang

When: Noon, Friday, March 31, 2017

Where: Room 100, KWGL

What:

      Chen: Lithospheric foundering and underthrusting imaged beneath Tibet

Long-standing debates exist over the timing and mechanism of uplift of Tibetan Plateau, and more specifically, over the connection between lithospheric evolution and the surface expressions of plateau uplift and volcanism. Our new tomographic model reveals a T-shaped high wave speed structure beneath South-Central Tibet, interpreted as remnant in the upper mantle from an earlier lithospheric foundering event. Its spatial correlation with ultrapotassic and adakitic magmatism supports the hypothesis of convective removal of thickened Tibetan lithosphere causing major uplift of Southern Tibet during the Oligocene. Lithospheric foundering induces an asthenospheric drag force, which drives continued underthrusting of the Indian continental lithosphere and shortening and thickening of the Northern Tibetan lithosphere. Surface uplift of Northern Tibet is subject to more recent asthenospheric upwelling and thermal erosion of thickened lithosphere, which is spatially consistent with the recent potassic volcanism and an imaged narrow low wave speed zone in the uppermost mantle.

      Jing:

Details

Date:
March 31
Time:
12:00 pm - 12:50 pm
Event Category:

Venue

100 Keith-Wiess Geological Laboratories
Rice University, 6100 Main Street
Houston, TX 77005 United States
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Phone:
7133484880

For outside visitors, the best way to get to our department is to come in on Rice Blvd and turn into entrance 20 (intersection of Rice and Kent St.). At the stop sign, you will see a visitor parking lot.  From there, walk east to the department.  The google map below shows exactly where our building is.