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Swiss Journal of Geosciences
Fig. 6 | Swiss Journal of Geosciences

Fig. 6

From: Fossil oceanic core complexes in the Alps. New field, geochemical and isotopic constraints from the Tethyan Aiguilles Rouges Ophiolite (Val d’Hérens, Western Alps, Switzerland)

Fig. 6

Microphotographs of zircon-bearing samples 038MG (a–c) and DK1 (d, e). Plane-polarized light photographs on the left and crossed-polarized light on the right a–a’ Clinopyroxene relic partially replaced by hornblende and bordered by apatite aggregates. b–b’ Apatite + ilmenite aggregate found as interstitial phases between former pyroxene and metamorphosed plagioclase, replaced by epidote and albite. c–c’ Idiomorphic zircon crystallized between cpx and (altered) plagioclase. d–d’ Idiomorphic hornblende displaying double cleavages surrounded by altered plagioclase (fine-grained epidote + chlorite + albite). Hornblende contains apatite + ilmenite inclusions, e–e’ Zircon + hornblende within a fine-grained epidote + chlorite + albite matrix

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