Formation Parameters of High-Pressure Minerals in the Dhofar 717 and 864 Chondrite Meteorites

· by · in , ,

K. D. Litasov, D. D. Badyukov, N. P. Pokhilenko

Doklady Earth Sciences
March 2019, Volume 485, Issue 1, pp 327-330
First Online: 28 May 2019

LINK

“This paper presents the results of a Raman spectroscopic study of shock melt veins in L6 chondritic meteorites Dhofar 717 and 864, and conclusions about the P–T parameters recorded in these meteorites after the impact event. The primary minerals of the host chondrite include olivine, orthopyroxene, clinopyroxene, plagioclase, chromite, phosphates, troilite, and kamasite. Shock melt veins up to 1 cm thick contain fragments of the high-pressure minerals ringwoodite, wadsleyite, majorite, akimotoite, jadeite, lingunite, and tuite and quenched melt consisting of majorite, ringwoodite, troilite, and kamasite. The mineral associations of the Dhofar 717 and 864 chondrites indicate high peak PT parameters of the impact in the region of stability of majorite (>20 GPa and >2500 K) and bridgmanite (>25 GPa and >2500 K). The presence of lingunite also directly indicates a peak pressure in the area of stability of the bridgmanite.”

Related posts (automatically generated):

  1. Back-transformation of high-pressure minerals in shocked chondrites: low-pressure mineral evidence for strong shock
  2. Cathodoluminescence of high‐pressure feldspar minerals as a shock barometer
  3. Mechanisms of ringwoodite formation in shocked meteorites: Evidence from L5 chondrite Dhofar 1970.
  4. High pressure minerals in the Château-Renard (L6) ordinary chondrite: implications for collisions on its parent bodyOPEN ACCESS 
  5. Formation, preservation and extinction of high-pressure minerals in meteorites: temperature effects in shock metamorphism and shock classificationOPEN ACCESS 
  6. High-pressure minerals in shocked meteorites.
  7. The nature of the L chondrite parent body’s disruption as deduced from high‐pressure phases in the Sixiangkou L6 chondrite
  8. High-pressure polymorphs in Yamato-790729 L6 chondrite and their significance for collisional conditions
  9. Discovery of nanophase iron particles and high pressure clinoenstatite in a heavily shocked ordinary chondrite: implications for the decomposition of pyroxene
  10. High Shock Pressure Metamorphism Induced Transformations of Olivine and Feldspar in Natun Balijan L4 Chondrite: Evidence from Micro-Raman, Infrared Spectroscopy, X-ray Diffraction and Electron Microprobe Analysis
Tags: , , , , , ,