Coesite in eclogites of the Lanterman Range (Antarctica): Evidence from textural and Raman studies

2002/03/22 by Barbara Ghiribelli, Maria Luce Frezzotti, Rosaria Palmeri · 4 citations
Earth and Planetary Sciences · #Geological and Geochemical Analysis #Geology and Paleoclimatology Research #earthquake and tectonic studies

paper · doi:10.1127/0935-1221/2002/0014-0355

openalex publication_date 2002/03/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/10

Abstract

Quartz pseudomorphs after possible retrogression of coesite were recognized petrographically within garnets of mafic eclogites from the Lanterman Range (Antarctica). In one of the quartz pseudomorphs the presence of a pristine coesite is indicated by in situ Raman microprobe spectroscopy. The results of the Raman analyses show that the quartz inclusion in addition to the typical quartz vibrations has a weak band at 521 cm(-1), which corresponds to the most intense fundamental vibration in coesite. This finding represents a first piece of evidence for ultrahigh-pressure metamorphism in Antarctica which was part of the Gondwana supercontinent affected by the Cambro-Ordovician orogenic cycle.

Citations

• Stability of andalusite and the aluminum silicate phase diagram
• Petrology and Geochronology of Eclogites from the Lanterman Range, Antarctica

Cited by

• Microfabrics of omphacite and garnet in eclogite from the Lanterman Range, northern Victoria Land, Antarctica
• Ultrahigh‐pressure metamorphism at the Lanterman Range (northern Victoria Land, Antarctica)
• Stable isotope geochemistry of ultrahigh pressure metamorphic rocks from the Dabie–Sulu orogen in China: implications for geodynamics and fluid regime
• Lanterman Range [wikipedia]