The Turiy Massif, Kola Peninsula, Russia: mineral chemistry of an ultramafic-alkaline-carbonatite intrusion

2003 ◽  
Vol 67 (3) ◽  
pp. 423-451 ◽  
Author(s):  
E. A. Dunworth ◽  
K. Bell
Keyword(s):  
Kola Peninsula ◽  
Rock Type ◽  
Mineral Chemistry ◽  
Central Complex ◽  
Southern Coast ◽  
Rock Series ◽  
Mineral Compositions ◽  
Silicate Rocks

AbstractThe Turiy Massif, on the southern coast of the Kola Peninsula, consists of five intrusive complexes containing a variety of carbonatites, phoscorites, melilitolites, ijolites and pyroxenites. Petrographic and mineralogical studies of the different rocks show that the samples are texturally heterogeneous. Minerals including apatite, garnet, magnetite, melilite, mica and pyroxene, show systematic variations in composition relating to the rock type in which they occur. Compositional similarities and/or distinct trends are seen in the mineral compositions within the each of the pyroxenite-melilitolite, and melteigite-ijolite rock series, indicating linked petrogenetic histories within each of the two series. The carbonatites from the northern complex may be related to nearby melilitolites, but the central complex carbonatites and phosocorites do not bear any mineralogical (or isotopic) similarities to any of the silicate rocks within the massif.

Mineral chemistry of columbite–tantalite from spodumene pegmatites of Kolmozero, Kola Peninsula (Russia)

2015 ◽  
Vol 64 ◽  
pp. 720-735 ◽  
Author(s):  
E.V. Badanina ◽  
M.A. Sitnikova ◽  
V.V. Gordienko ◽  
F. Melcher ◽  
H.-E. Gäbler ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Mineral Chemistry

The mineral chemistry of dolerites and gabbros from the central Complex of Slieve Gullion, NE Ireland

1982 ◽  
Vol 46 (338) ◽  
pp. 103-110
Author(s):  
John A. Gamble
Keyword(s):  
High Temperatures ◽  
Root Zone ◽  
Mineral Chemistry ◽  
Tholeiitic Basalt ◽  
Central Complex ◽  
Shield Volcano ◽  
Show Evidence ◽  
Silicate Olivine

SynopsisThe dolerites and gabbros of the Tertiary central complex of Slieve Gullion, NE Ireland, represent a suite of tholeiitic magmas (varying from tholeiitic basalt to tholeiitic andesite, Gamble 1979a) which crystallized in the root-zone of a shield volcano. The ubiquity of biotite suggests that the magmas were hydrous and, in addition, both silicate (olivine) and oxide (Ti-magnetite) phases show evidence for oxidation at high temperatures.

The Garies Wollastonite Deposit, Namaqualand, South Africa: High-Temperature Metamorphism of a Low-δ18O Skarn?

2021 ◽  
Author(s):  
Chris Harris ◽  
Lucrecia Maboane
Keyword(s):  
Carbonate Rocks ◽  
Granulite Facies ◽  
High Water ◽  
Mineral Chemistry ◽  
Silicate Minerals ◽  
Peak Metamorphism ◽  
O Isotope ◽  
Isotope Equilibrium ◽  
High Temperature Metamorphism ◽  
Silicate Rocks

ABSTRACT The Garies wollastonite deposit is located in the Bushmanland terrane of the Namaqualand Metamorphic Province and is part of a discontinuous calc-silicate unit bounded by granulite facies gneiss that experienced peak metamorphic temperatures above 800 °C. In bulk, the deposit is dominated by wollastonite, but varied proportions of garnet, diopside, quartz, calcite, and vesuvianite are also present. Mineral chemistry variations across the deposit are minor, and the absence of inclusions indicates textural and chemical equilibrium. The wollastonite-bearing rocks have unusually low mineral δ18O values: –0.6 to +2.2‰ for garnet, –0.2 to +2. 6‰ for clinopyroxene, and –0.2 to +0.4‰ for wollastonite. Calcite δ18O values range from 6.8 to 11. 8‰ and δ13C values from –6.4 to –3.2‰. Calcite δ18O values are unusually low for calc-silicate rocks, but Δcalcite-garnet values from 3 to 12‰ indicate O-isotope disequilibrium between calcite and the silicate minerals. Garnet-biotite metapelitic and diopside gneisses have unexpectedly low δ18O values (<7‰). The approach to O-isotope equilibrium displayed by coexisting silicate minerals, and low mineral δ18O values in calc-silicate and metapelite and metapsammite gneisses, is consistent with low δ18O values being acquired before peak metamorphism. Low δ18O values in the minerals of the calc-silicate rocks require interaction with external fluid at high water/rock ratio. We suggest that the deposit represents a metamorphosed skarn that developed at the contact between the original carbonate rocks and intruding felsic magmas.

scholarly journals Paleoenvironmental changes and the development of lakes in the late pleistocene and holocene on the Kola Peninsula southern coast (near the village of Umba)

2015 ◽  
pp. 60
Author(s):  
Татьяна Валентиновна Сапелко ◽  
Василий Васильевич Колька ◽  
Владимир Яковлевич Евзеров ◽  
Tatiana Sapelko ◽  
Vasili Kolka ◽  
...  
Keyword(s):  
Kola Peninsula ◽  
Late Pleistocene ◽  
Southern Coast ◽  
Paleoenvironmental Changes ◽  
The Village

Comparative mineral chemistry of IDPs, micrometeorites and meteorite matrices

1992 ◽  
Vol 50 (2) ◽  
pp. 1718-1719
Author(s):  
Wolfgang Klöck
Keyword(s):  
Mineral Chemistry ◽  
Interplanetary Dust ◽  
Dust Particles ◽  
Type I ◽  
Interplanetary Dust Particles ◽  
Mineral Phases ◽  
Mineral Compositions ◽  
Almost All ◽  
Iron Manganese ◽  
Solar Flare Tracks

Chondritic porous aggregates are one subclass of Interplanetary Dust Particles (IDPs). The remaining classes presently identified are hydrated IDPs consisting mainly of serpentine or smectite. We have been investigating mineral compositions in these types of IDPs, in micrometeorites from Antarctica and compared them to mineral compositions in finegrained meteorite materials, like matrices and chondrule dust mantles from several meteorite classes. Based on our mineral analyses we subdivide anhydrous IDPs into three types. Type I contains olivines and/or pyroxenes having very variable iron contents from Fa 0 to Fa 35 and Fs 0 to Fs 30. Mineral phases in these particles are truly unequilibrated. Mineral grains in several particles of type I IDPs were found to contain solar flare tracks (pers. comm. John Bradley, McCrone Associates, Chicago). Almost all type I IDPs studied contain low-iron manganese enriched (LIME) olivines and/or pyroxenes.

Chemical weathering of silicate rocks in Karelia region and Kola peninsula, NW Russia: Assessing the effect of rock composition, wetlands and vegetation

2007 ◽  
Vol 242 (1-2) ◽  
pp. 255-277 ◽  
Author(s):  
E.A. Zakharova ◽  
O.S. Pokrovsky ◽  
B. Dupré ◽  
J. Gaillardet ◽  
L.E. Efimova
Keyword(s):  
Kola Peninsula ◽  
Chemical Weathering ◽  
Rock Composition ◽  
Silicate Rocks
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