European Geosciences Union General Assembly 2015 - Garnet Classification
Evolution of metasomatic agent for Group III-V
In the mantle peridotite xenoliths suit we
have a nature example of this model:
A zoned garnet crystal, which has
progressive change of composition from
relict zone with "sinusoidal"- harzburgitic
REE profiles to megacryst-like REE profiles
for the latest zone.
Ziberna et al., 2013:
Plate model numerical simulation
Gar / C1 (Sun & McDonough, 1989)
100
V
10
0.1
0.01
EUROPEAN
O 466-2 rim
GEOSCIENCES UN
General Assembly 2015
466-2 core
Group V
La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
Grt/CI
100
(c)
10
1 cell, Grt Z4-3 (group B)
0.1
14th cell
Grt Z4-8 (group C)
0.01
Grt Z5-14 (group C)
Grt in the ambient peridotite
(from Grt Z4-11)
CC
0.001
Ο
BY
La Ce Pr Nd Sm Eu Gd Tb Dy Ho Er Tm Yb Lu
100 мт
[email protected]
100μm
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