Investigation on Deformation in Amphibole and Amphibole-Bearing Xenoliths from the Kimberlite Bearing Diatremes on the Colorado Plateau.

Abstract

Amphibole from metagabbros from campello Monti, Novara (Italy) show ductile deformation as twinning on (-1,0,1) similarly to experimentally deformed hornblende and tremolite. In nature the most common deformation of amphibole is of the brittle type. This study proves that ductile type of deformation is also possible in a natural environment. Undulatory extinction is common, twinning and deformation lamellae are extremely rare, and, as far as the author is aware, they have not been previously reported. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 07, 1973
Accession Number
AD0779779

Entities

People

  • Anna T. Gavasci

Organizations

  • Lamont–Doherty Earth Observatory

Tags

DTIC Thesaurus Topics

  • Chemical Compounds
  • Colorado
  • Deformation (Mechanics)
  • Environment
  • Extinction
  • Inorganic Chemicals
  • Inosilicates
  • Minerals
  • Silicates

Readers

  • European Security and Defence Policy (ESDP).
  • Materials Science and Engineering.
  • Theoretical Analysis.