In most ophiolites the uhramafic section is harzburgitic. It is rarely composed of residual lherzolites, except for the local occurrence of impregnation lherzolites within harzburgitic massifs. Several characters (environmental formations, thickness. The lower parts of a high-porosity channel are harzburgite and lherzolite. The size and dimension of dunite channels depend on the amplitude of lateral porosity variations at the base of the melting column, whereas the depth of dunite channel initiation depends on the melt flux entering the channel from below.
Harzburgite et lherzolite (Niveaux d’harzburgite et de lherzolite)
Compositional variations of pyroxenes in dunite and harzburgite
Megacrystalline harzburgitedunites (MHD) from Udachnaya pipe, Yakutia
Morphological diversity of Crspinel in harzburgite, dunite and
Photomicrographs of the Dongqiao ophiolite. (a) Harzburgite composed of
(a) Field view of the Baijiantan ophiolitic mélange showing lherzolite
(PDF) Harzburgite and lherzolite subtypes in ophiolitic and oceanic
Photomicrographs of peridotite of the Purang ophiolite (a) harzburgite
3. Outcrop photographs of (a) Two Tarns Harzburgite showing a subtle
Harzburgite et lherzolite (Niveaux d’harzburgite et de lherzolite)
Mantle rocks of the Massif du Sud ophiolite. (a) Deep harzburgite with
Major, trace and platinumgroup element geochemistry of harzburgites
Equilibrium mineral assemblages along the Guerrero geotherm. (ac
Representative photomicrographs (plane light and polarized light) of
Selected petrological features in harzburgite and lherzolite from the
The main lithologies and structural sequence in the Oman Ophiolite
Velocity of coldest harzburgite layer, lherzolite, mid‐ocean ridge
Selected petrological features in harzburgite and lherzolite from the
Schematic columnar sections of ophiolite types and inferred equivalent
Photomigraphs of the main lithotypes (a = Diopside harzburgite; b
It is now recognized that harzburgite and lherzolite may occur simultaneously within a given Structure and lithology of ophiolites A complete and intact ophiolite, like the Troodos complex, consists from the base upward, of tectonized peridotite, layered ultramafic and mafic cumulates, homogeneous gabbros, sheeted dikes and pillow lavas, commonly with interbedded radiolarian chert (e.g.. The Pozantı-Karsantı Ophiolite located in the middle Taurus has significant chromitite reserves in Turkey. The chromitite ore bodies belong to concordant and subconcordant form and are located within mantle harzburgite surrounded by bodies of dunite.
