Investor Presentaiton
Features of chromitites
Chromitites are located within the mantle section (dunites, garzburgites, serpentenites). Massive chromitites consist of aggregate euhedral to subhedral crystal shape of chromite
grains, only separated one from the other by a thin film of chlorite and serpentine or olivine and minor serpentine.
5 CM
Shlieren, lensoidal pods
Shlieren, lensoidal pods
Structural and textural features and stages of deformation are:
1) lenticular (from one to three centimeters in thikness);
2) irregular ore bodies (lenses some centimeters thick, pods, schlieren); some lenses, pods, schlieren
pods is grouped forming vein type.
3) schlieren type during the tectonic processes is transformed to structure of tectonic flow,
deformation structure up to forming the structure of "snowball" type – massive chromitites;
Al 12
Cr
IV
16
VII
XX
VII 3+
Fe
12
2
☐
3
Ore Chr-spineles consist of chrompicotite,
alumochromite, chromite, ferrochromite and Chr-
magnetite and magnetite. Chr-spineles have
composition (wt.%): Al2O3 10÷22 и 36÷39,
Сг₂О3 46÷53 и 28÷35; MgO 12÷15 и 19÷20
wt.%.
Studied chromitites show chemical characteristics
typical of podiform chromite deposits
Diagram compositions of Chr-spineles of the
Ulag-Sar'dag massive
Vein type
Vein type, deformed pods
7 CM
Structure of "snowball"
Deformed structure
Table of Chr-spinel parameters
Al#
I group
24-60
Cr#
36-74
II group
14-23
74-81
III group
13-27
68 - 81
Mg#
45-74
32 - 48
28-35View entire presentation