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1
Atlas of the Textural Patterns of Ore Minerals and ...
(a) U-Parageneses (General) When considering element segregations to form
mineral associations-paragenesis the hydrothermal and pegmatitic U-
parageneses are chosen, because in any case, there are not only most complex
mineral ...
Stylianos Augustithis, 1995
2
Active Margins and Marginal Basins of the Western Pacific
In the former case, these minerals contain variable amounts of Cr203. Mineral
Parageneses Since the Hole 778A metabasites are low in metamorphic grade
and are very fine-grained, we cannot assume that an entire thin section is in total
...
Brian Taylor, James Natland, 1995
3
Mineralogical Application on Environments, Archeometry and ...
The following mineral parageneses were identified: i. pyrrhotite-galena-
sphalerite with magnetite and chalcopyrite, ii. pyritearsenopyrite, iii. pyrite-galena
-sphalerite -sulfosalts, iv. pyrite, v. antimonite. The pyritegalena-sphalerite-
sulfosalts and ...
The specimens that were used to evaluate the iron content of garnet in these
parageneses bear no clear signs of superposed structural or mineral
transformations. However, the results of a microprobe study of the composition of
the minerals ...
5
The Boundaries of the West African Craton
First report of ultrahigh-temperature sapphirine + spinel + quartz and
orthopyroxene + spinel + quartz parageneses discovered in Al-Mg granulites
from the Khanfous area (In Ouzzal metacraton, Hoggar, Algeria) Z. ADJERID1, K.
OUZEGANE2, ...
Nasser Ennih, Jean-Paul Liégeois, 2008
6
Rare Earth Elements in Ultramafic and Mafic Rocks and their ...
In harzburgite parageneses samples the content of CaO varies in the range of ∼
0,n-6 wt%, which is considerably less than in the garnets from the
microinclusions oflherzolite parageneses (5–8.6 wt%) [Stachel et al., 2004].
Nevertheless, both ...
7
Petrogenesis of Metamorphic Rocks
Parageneses. The petrogenesis of metamorphic rocks is often a long-lasting
complicated process in time and space which perhaps may endure for 30 Ma or
so (see Chap. 3). The geologists collects the end product of such a long-drawn-
out ...
Kurt Bucher, Rodney Grapes, 2011
8
Antarctic Earth Science
Superposed Mineral Parageneses and Element Partitioning Among Mineral
Pairs Superposition of the amphibolite facies mineral parageneses on granulite
facies parageneses Banno et al. (1964) and Suwa (1968) considered that the
mineral ...
R. L. Oliver, P. R. James, J. B. Jago, 1983
9
Progress in Metamorphic and Magmatic Petrology: A Memorial ...
(1-13) - fields for sodium metasomatitcs of different types showing the mineral
parageneses in the column rear zones at equilibrium with the solution (PH2o= 1
kb, l -° M, ' = 336 h, solution is not saturated with SiO2). strongly on the solution
pH ...
10
Atlantic Rifts and Continental Margins
The Ml stage produced intermediate to high pressure mineral parageneses.
Microstructural observations indicate that Ml parageneses form the main foliation.
The peak metamorphic temperature increases eastwards, from the Occidental to
...
Webster Mohriak, Manik Talwani, 2000
