Generalized geologic map of Nepal. Modified from Amatya and Jnawali, 1994, Nepal Department of Mines and Geology.

The tectonics reading group meets on Fridays from 3:00-4:00 in CHM 1215. All are welcome to participate.

Discussion Leader Schedule

• September 7: Lisa Schleicher
• September 14: Postponed
• September 21: Kate Burgy
• September 28 (Tetsuya Komabayashi): Rachel Potter
• October 12 (Lara Wagner): Jingao Liu
• October 19: Aaron Martin, Sarah Penniston-Dorland
• October 26 (GSA next week): Adam Mansur
• November 2: Greg Shofner
• November 9: Xiaoming Liu
• November 16: Pramod Doguparty
• December 7: Barry Reno

Leucosome in stromatic migmatite is in petrographic continuity (microstructure, mineralogy and mode) with granite in the highly discordant, apparently cross cutting dyke. Le Petit Mont, Arzon, Morbihan, France.

Two distinctive permeability-porosity trends are found in Roane cores from the Mothra Hydrothermal vent field on the Endeavor Segment of the Juan de Fuca Mid-Ocean Ridge. Microstructural observations suggest that the difference in the two permeability-porosity relationships reflects different pore evolution processes: sealing of pores with angular sulfide grains results in a power law with an exponent of ~9, whereas sealing of pores by late stage amorphous silica results in a power law with an exponent of ~3.