TOURMALINE-BEARING LITHOLOGIES OF THE PERALUMINOUS TUSAQUILLAS COMPOSITE GRANITIC BATHOLITH, NW ARGENTINA: EVIDENCE FOR MAGMATIC-HYDROTHERMAL TRANSITION FROM QUARTZ AND TOURMALINE

2020 ◽  
Author(s):  
Darrell J. Henry ◽  
◽  
Eduardo O. Zappettini ◽  
Barbara Dutrow
Keyword(s):  
Granitic Batholith

Actinide and rare earth element characteristics of deep fracture zones in the Lac du Bonnet granitic batholith, Manitoba, Canada

1993 ◽  
Vol 57 (6) ◽  
pp. 1181-1202 ◽  
Author(s):  
Lise Y. Griffault ◽  
Mel Gascoyne ◽  
Choudari Kamineni ◽  
Robert Kerrich ◽  
Tjalle T. Vandergraaf
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Fracture Zones ◽  
Deep Fracture ◽  
Granitic Batholith

New data on the age and geodynamic interpretation of the Kalba-Narym granitic batholith, eastern Kazakhstan

2015 ◽  
Vol 462 (2) ◽  
pp. 565-569 ◽  
Author(s):  
P. D. Kotler ◽  
S. V. Khromykh ◽  
A. G. Vladimirov ◽  
O. V. Navozov ◽  
A. V. Travin ◽  
...  
Keyword(s):  
Granitic Batholith ◽  
Eastern Kazakhstan

scholarly journals Petrografia dos mármores de Caçapava do Sul, RS

1987 ◽  
Vol 9 (9) ◽  
pp. 37 ◽  
Author(s):  
Olavo José Bortolotto
Keyword(s):  
Chemical Analysis ◽  
Rio Grande ◽  
Final Conclusion ◽  
Chemical Analyses ◽  
Rio Grande Do Sul ◽  
Rock Body ◽  
X Ray ◽  
Rock Bands ◽  
Staining Techniques ◽  
Granitic Batholith

The Caçapava do Sul region, State of Rio Grande do Sul, is characterized by the occurrence of a granitic batholith (Caçapava Granite), that has an outcrop of about 25 by 10 km, oriented North- South. The Caçapava Granite is surrounded by a belt of metamorphites belonging to the Porongos Group, assigned to Upper Precanbrian by RIBEIRO et alii: (1966). Among the metamorphites occur a carbonatic rock body, lens shaped, with clear contacts, interpenetrated by granitic apophises and with an outcrop of about 17 km2. Samples of this rock body were studied by microscopic, difratometry and spectrometry of X ray, electronic microprobe and chemical analyses aiming at identifying and characterizing the carbonatic and silicatic minerals. Through staining techniques it was possible to distinguish dolomite (Do), calcite (Cc) and ferriferous calcite (Ccf). The modal and chemical analysis showed that the carbonatic minerals were more abundant than the silicatic ones being these last ones restricted to of the rock bands. The detected silicatic minerals were the following: talc, tremolite, diopside, forsterite, chlorite and phlogopite. In smaller amounts titanite, apatite and quartz also occur. Serpentine resulting from alterations in the olivine is also very common. The final conclusion with these studies, about the carbonatic rocks, indicate that they are contact impure dolomitic marbles.

Chemical variation in Al2O3–CaO–Na2O–K2O space: controls on the peraluminosity of the South Mountain Batholith

2004 ◽  
Vol 41 (7) ◽  
pp. 785-798 ◽  
Author(s):  
D Barrie Clarke ◽  
Michael A MacDonald ◽  
Saskia Erdmann
Keyword(s):  
Nova Scotia ◽  
Chemical Evolution ◽  
Wall Rock ◽  
Aqueous Fluid ◽  
Isotopic Ratios ◽  
Chemical Variation ◽  
The South ◽  
South Mountain Batholith ◽  
Upper Limit ◽  
Granitic Batholith

The South Mountain Batholith (SMB) of southwestern Nova Scotia is a large, highly differentiated, peraluminous, granitic batholith in which the average A/CNK (mol Al2O3/mol(CaO + Na2O + K2O)) increases from 1.16 to 1.23 with chemical evolution. We use vector analysis of variations solely in Al2O3–(CaO + Na2O + K2O) space to assess the fractionation, assimilation, fluid, and source controls on the peraluminosity of the SMB. With increasing chemical evolution, Al2O3 decreases, CaO decreases sharply, Na2O is approximately constant, and K2O increases in the early and middle stages but decreases in the most evolved stage. Initial 87Sr/86Sr and 143Nd/144Nd isotopic ratios for granites and average Meguma Supergroup country rocks suggest an upper limit of ~33% of wall-rock contamination for the most evolved rocks, if the most primitive rocks are uncontaminated. The trend of chemical evolution of the SMB through Al2O3–(CaO + Na2O + K2O) space is the resultant of all input vectors (processes). In the early stages, those processes are fractional crystallization of plagioclase ± K-feldspar ± cordierite ± biotite and contamination by country rocks. In the later stages, those processes are fractionation of plagioclase ± K-feldspar ± andalusite ± muscovite, further contamination by country rocks, and selective partitioning of Ca–Na–K into aqueous fluid phases. Clear geochemical evidence for variation in the source composition is lacking.

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