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The authors have never observed a real example of co-oriented replacement of plagioclase by K-feldspar. 2. ... the secondary origin of ... all the primary K-feldspar ...
K/NA VARIATION IN PHLOGOPITE AND AMPHIBOLE OF UPPER MANTLE PERIDOTITES DUE TO FRACTIONATION OF THE ... or plagioclase peridotites ... secondary or replacement ...
Hydrothermal alteration of plagioclase in granitic rocks from Proterozoic basement of ... Replacement of plagioclase by K-feldspar ... secondary K-feldspar ...
Hydrothermal alteration of plagioclase and growth of ... alteration of plagioclase and growth of ... of primary plagioclase, secondary Na ...
Heat Source Movements in Lendong Geothermal Field and ... 2. Replacement of primary minerals ... minerals cavity and as replacement of plagioclase and .
Start studying Textural Terms for Igneous Rocks. Learn vocabulary, ... Most common are plagioclase laths ... Formed by the replacement of primary mineral by secondary ...
primary K-feldspars exhibit rim replacement by K-rich secondary feldspar. ... K-feldspar A A A A A LA LA Plagioclase A A VA VA VA LA LA
Hydrothermal wallrock replacement of ... Primary groundmass K- ... Primary groundmasses are interpreted to and locally observed to comprise felsitic plagioclase, K-
K- AND Si-METASOMATISM IN THE DONEGAL GRANITES OF NORTHWEST IRELAND. ... of primary plagioclase by secondary .
PETROLOGY AND GEOCHEMISTRY OF SANDSTONES IN THE LOWER CRETACEOUS SUBMARINE FAN COMPLEX, DEEP SEA DRILLING ... K-feld-spar (8.7 vol.%), plagioclase (4.8 vol ...
Linking Sr systematics to the cooling of the lower oceanic crust - evidence from ... by the replacement of primary plagioclase ... secondary plagioclase ...
Sericitization in three separate pulses of the Rosses Granite Ring ... of the adjacent primary plagioclase within the ... replacement of plagioclase by ...
Figure 2. The study area belongs to Central Iran Micro-continent [10] and western Alborz-Azerbaijan [11] based on the tectono-stratigraphic zones of Iran (Figure ...
Impact-induced replacement of plagioclase by K-feldspar in granitoids and ... microcline present in primary ... that the main secondary minerals ...
Hydrothermal alteration of plagioclase in granitic ... alteration of plagioclase in granitic rocks ... of primary and secondary feldspars ...
Abstract Tamanrasset (Central Hoggar, Algeria) is part of the 2000 Ma Eburnean terrane in which spectacular examples of granulite‐grade metapelites and metabasites ...
primary minerals with secondary biotite, K ... by the replacement of the plagioclase ... mineralogical characteristics of the hydrothermal types ...
Mineralogy and chemistry of San Carlos high-alkali basalts: Analyses of alteration with application for Mars exploration. ... we determine the primary and secondary ...
Some samples show replacement of microcline by albite and ... mostly in paragenesis with K-feldspar, primary ... secondary albite. K-feldspar crystallized in ...
The replacement of plagioclase feldspars by albite: observations from hydrothermal experiments. ... and secondary ore ... replacement of plagioclase ...
L.G. Collins explains the formation of myrmekite by: the K-metasomatic replacement of deformed primary plagioclase by secondary K-feldspar;
amounts of interstitial primary K-feldspar) ... deformed rocks where incomplete interior replacement of plagioclase by secondary K-feldspar occurs ...
of microfractured primary plagioclase, this replacement is in parallel alignments of ... Where secondary K-feldspar forms by K-metasomatism of primary ...
Potassic-phyllic The replacement of plagioclases by ... secondary K-feldspar after plagioclase and ... replaced plagioclase, quartz, primary and secondary ...
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