Τίτλος:
On the occurrence of Mg- and Fe-rich carbonate mineral assemblages
hosted in the Nain ophiolite melange, Central Iran and their industrial
potential
Γλώσσες Τεκμηρίου:
Αγγλικά
Περίληψη:
In the Nain ophiolite melange, central Iran, off-white mineral
assemblages occur as nodular magnesium rich carbonates and thin veinlets
disseminated within an earthy serpentinite groundmass. They are related
to tectonically disturbed, strongly weathered zones of the ultramafic
rocks. Combined XRD, SEM and TG/DTA analysis revealed that the
mineralogy of the Mg-rich carbonate is varied. Ten distinct paragenetic
assemblages containing hydromagnesite, pyroaurite, manasseite,
brugnatellite, hydrotalcite, aragonite, and/or huntite were found. The
mineral assemblages formed as the result of precipitation from
percolating Mg-rich meteoric waters through brecciated serpentinites.
The source of Mg in excess in the groundwater is attributed to the
hydrolysis of Mg-rich minerals in the predominant serpentinized
ultramafic rocks. Selected hydromagnesite-rich samples were tested as
fire retardants. Even though hydromagnesite is the predominant mineral
phase, the economic importance of the mineral assemblages in total is
limited mainly because of the insufficient whiteness and the presence of
Fe-rich minerals that cause undesirable thermal reactions.
Συγγραφείς:
Eslami, Alireza
Stamatakis, Michael G.
Perraki, Maria and
Vasilatos, Charalampos
Hollingbery, Luke
Περιοδικό:
Neues Jahrbuch fur Mineralogie, Abhandlungen
Εκδότης:
E SCHWEIZERBARTSCHE VERLAGSBUCHHANDLUNG
Λέξεις-κλειδιά:
nodular Mg-rich carbonates; serpentinite; hydromagnesite; huntite;
pyroaurite; fire retardants; economic importance; Nain ophiolite
melange; Iran
DOI:
10.1127/njma/2014/0271
