ON THE RELATIVELY COMPOSITIONAL HOMOGENEITY OF ALBANIAN EASTERN OPHIOLITIC BELT

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ON THE RELATIVELY COMPOSITIONAL HOMOGENEITY OF ALBANIAN EASTERN OPHIOLITIC BELT (EN)

Çina, Α.

info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion

2016-07-28


Ophiolitic formation of Albanides, named as Mirdita zone, represents a compactsegment of oceanic lithosphere of Middle-Upper Jurassic. Based on petrographic,geochemical and metalogenical features two types of belts are distinguished: westernMORB and eastern SSZ types. In fact, structural and geological units as well as manyother elements have shed light on lack of a sharp separation between the two belts.Recent investigations have evidenced that different ultramafic massifs of westernophiolitic formation, represent an evident variation of their composition fromharzburgite to lherzolitic -types. This composition reflects a different grade of partialmelting of upper mantle. Peridotites show a high variability, from 0.3 - 3.8 wt.%Al2O3, varying from small to highly extreme depleted peridotite.On the contrary, Albanian eastern belt, it seems to be formed by a more homogeneoushartzburgitic mantle.Detailed petrologic and metallogenic investigations have evidenced that this beltchanges also from one massif to another, naturally at a smaller level, therefore it iseasier to be named relatively homogeneous. It is distinguished by a higher meltingdegree, chiefly of hartzburgitic-type, characterized by whole and thick ultramaficsection, as well as by metalogenic variety, mostly of metallurgic-type of chromitemineralization. It is supposed that rock-forming and mineraluzation processes havebeen developed not uniformly along the ophiolitic belt. (EN)


Chromite (EN)
SSZ-type (EN)
ophiolite section (EN)

Δελτίο της Ελληνικής Γεωλογικής Εταιρίας

Αγγλική γλώσσα

Geological Society of Greece (EN)


0438-9557
2529-1718
Δελτίο της Ελληνικής Γεωλογικής Εταιρείας; Τόμ. 50 Αρ. 4 (2016): 14o Διεθνές Συνέδριο της Ελληνικής Γεωλογικής Εταιρίας; 1789-1798 (EL)
Bulletin of the Geological Society of Greece; Vol. 50 No. 4 (2016): 14th International Conference of the G.S.G.; 1789-1798 (EN)

Copyright (c) 2017 Α. Çina (EN)
https://creativecommons.org/licenses/by-nc/4.0




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