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Sericitization in three separate pulses of the Rosses Granite Ring ... of the adjacent primary plagioclase within the ... replacement of plagioclase by ...
The authors have never observed a real example of cooriented replacement of plagioclase by Kfeldspar. 2. ... the secondary origin of ... all the primary Kfeldspar ...
Myrmekite''s wiki: Myrmekite describes a vermicular, or wormy, intergrowth of quartz in plagioclase. The intergrowths are microscopic in scale, typically with maximum ...
Read "Hydrothermal alteration of plagioclase in granitic rocks from Proterozoic basement of SE Sweden, Geological Journal" on DeepDyve, the largest online rental ...
The early to middle Eocene basalts exhibit textures and primary ... to severely altered with secondary ... shale and several basalt whole rock minimum K ...
Collins explains the formation of myrmekite by: the Kmetasomatic replacement of deformed primary plagioclase by secondary Kfeldspar;
Abstract Tamanrasset (Central Hoggar, Algeria) is part of the 2000 Ma Eburnean terrane in which spectacular examples of granulite‐grade metapelites and metabasites ...
K/NA VARIATION IN PHLOGOPITE AND AMPHIBOLE OF UPPER MANTLE PERIDOTITES DUE TO FRACTIONATION OF THE ... or plagioclase peridotites ... secondary or replacement ...
amounts of interstitial primary Kfeldspar) ... deformed rocks where incomplete interior replacement of plagioclase by secondary Kfeldspar occurs ...
Hydrothermal wallrock replacement of ... Primary groundmass K ... Primary groundmasses are interpreted to and locally observed to comprise felsitic plagioclase, K
Hydrothermal alteration of plagioclase in granitic rocks from Proterozoic basement of ... Replacement of plagioclase by Kfeldspar ... secondary Kfeldspar ...
... Na 2 O and K 2 O than the magnesiohornblende ... Wt% MgO in plagioclase: Primary, ≤ wt%; secondary, ... indicate graphically that plagioclase replacement ...
1 ISSN 2. REPLACEMENT OF PRIMARY PLAGIOCLASE BY SECONDARY KFELDSPAR AND MYRMEKITE Lorence G. Collins email: lorencec
primary minerals with secondary biotite, K ... by the replacement of the plagioclase ... mineralogical characteristics of the hydrothermal types ...
CHEMISTRY AND ORIGIN OF SECONDARY MINERALS FROM THE DEEP ... Secondary plagioclase compositions range from ... % replacement of .
PETROLOGY AND GEOCHEMISTRY OF SANDSTONES IN THE LOWER CRETACEOUS SUBMARINE FAN COMPLEX, DEEP SEA DRILLING ... Kfeldspar ( vol.%), plagioclase ( vol ...
An example of trondhjemite genesis by ... as are apatite replacement by Alepidote and secondary ... Rare albitization of primary magmatic plagioclase and ...
Plagioclase is a series of tectosilicate (framework silicate) minerals within the feldspar group. Rather than referring to a particular mineral with a specific ...
Some samples show replacement of microcline by albite and ... mostly in paragenesis with Kfeldspar, primary ... secondary albite. Kfeldspar crystallized in ...
Common Igneous Textural Terms and ... A secondary texture consisting of irregular "wormy" blebs or rods of quartz in ... Replacement of plagioclase by ...
of microfractured primary plagioclase, this replacement is in parallel alignments of ... Where secondary Kfeldspar forms by Kmetasomatism of primary ...
are the basic building blocks for most primary and secondary soil ... This replacement also generates ... Al proxying for Si, 1/4 < Al/Si + Al <1/2 a. plagioclase ...
Isomorphous substitution is the replacement of ... In the primary silicates, Ca 2+, Na +, K + are ... In the alkali feldspars Na + and K +, and in the plagioclase, Na ...
Impactinduced replacement of plagioclase by Kfeldspar in granitoids and ... microcline present in primary ... that the main secondary minerals ...
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