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Organic inclusions evidence, composition, and cathodoluminescence behaviour for the formation conditions of fluorapatite from Anemzi (Morocco)
Author(s) -
DumańskaSłowik Magdalena,
WesełuchaBirczyńska Aleksandra,
Heflik Wiesław,
Maksymiuk Weronika,
SikorskaJaworowska Magdalena
Publication year - 2018
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.5484
Subject(s) - fluorapatite , cathodoluminescence , apatite , organic matter , mineralogy , anatase , mineral , rutile , hydrocarbon , titanium , geology , chemistry , chemical engineering , materials science , organic chemistry , luminescence , photocatalysis , optoelectronics , catalysis , engineering
Fluorapatite from Anemzi alkaline syenite hosts a wealth of solid organic inclusions, mainly of aliphatic (2,935–2,845 cm −1 ) and aromatic hydrocarbon compositions (3,100–3,000 cm −1 ), as well as traces of bituminous matter showing a low degree of ordering. The tiny inclusions built from oxides of titanium (rutile and anatase) are the only mineral phases found in host crystals. The two‐phase, liquid–gas fluid inclusions are composed of aliphatic and aromatic functional groups, revealing bands in the region 1,600–1,200 cm −1 . A slightly chemically varied composition and blue, homogenous cathodoluminescence colours, activated mainly by Ce 3+ , as well as a small volume of mineral inclusions in apatite, indicate that its crystallization, as influenced by hydrocarbon‐ and carbonaceous matter‐bearing fluids, proceeded under stable environmental conditions. It is probable that these fluids were migrated within the adjacent carbonate rocks found in the vicinity of alkaline syenites, which could be the source of organic components entrapped by apatite. A numerous assemblage of organic inclusions is diagnostic feature for gem quality green apatite from Anemzi.