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Journal of Zhejiang University SCIENCE A 2007 Vol.8 No.7 P.1004~1010

10.1631/jzus.2007.A1004


Fluid components in accessory minerals of Pan-African granitoids in the Sør Rondane Mountains, East Antarctica


Author(s):  LI Zi-long, CHEN Han-lin, YANG Shu-feng, TAINOSHO Yoshiaki, SHIRAISHI Kazuyuki, OWADA Masaaki

Affiliation(s):  Department of Earth Science, College of Science, Zhejiang University, Hangzhou 310027, China; more

Corresponding email(s):   zilongli@zju.edu.cn

Key Words:  Fluorine contents, Accessory minerals, Pan-African granitoids, Sø, r Rondane Mountains, Antarctica


LI Zi-long, CHEN Han-lin, YANG Shu-feng, TAINOSHO Yoshiaki, SHIRAISHI Kazuyuki, OWADA Masaaki. Fluid components in accessory minerals of Pan-African granitoids in the Sør Rondane Mountains, East Antarctica[J]. Journal of Zhejiang University Science A, 2007, 8(7): 1004~1010.

@article{title="Fluid components in accessory minerals of Pan-African granitoids in the Sør Rondane Mountains, East Antarctica",
author="LI Zi-long, CHEN Han-lin, YANG Shu-feng, TAINOSHO Yoshiaki, SHIRAISHI Kazuyuki, OWADA Masaaki",
journal="Journal of Zhejiang University Science A",
volume="8",
number="7",
pages="1004~1010",
year="2007",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2007.A1004"
}

%0 Journal Article
%T Fluid components in accessory minerals of Pan-African granitoids in the Sør Rondane Mountains, East Antarctica
%A LI Zi-long
%A CHEN Han-lin
%A YANG Shu-feng
%A TAINOSHO Yoshiaki
%A SHIRAISHI Kazuyuki
%A OWADA Masaaki
%J Journal of Zhejiang University SCIENCE A
%V 8
%N 7
%P 1004~1010
%@ 1673-565X
%D 2007
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2007.A1004

TY - JOUR
T1 - Fluid components in accessory minerals of Pan-African granitoids in the Sør Rondane Mountains, East Antarctica
A1 - LI Zi-long
A1 - CHEN Han-lin
A1 - YANG Shu-feng
A1 - TAINOSHO Yoshiaki
A1 - SHIRAISHI Kazuyuki
A1 - OWADA Masaaki
J0 - Journal of Zhejiang University Science A
VL - 8
IS - 7
SP - 1004
EP - 1010
%@ 1673-565X
Y1 - 2007
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2007.A1004


Abstract: 
Fluids (fluorine, chlorine, and OH) in accessory minerals (apatite, titanite and allanite) of pan-African granitoids (Group-I granitoids, Group-II granitoids and Mefjell Plutonic Complex) from the ;r Rondane Mountains, East antarctica were precisely measured by an electronic microprobe analyzer in this study. Apatites in the granites have commonly high fluorine contents. However, fluorine contents from the Group-I, Group-II granitoids and Mefjell Plutonic Complex (MPC) are of important variation, which F contents (3.21~7.20 wt%) in apatite from the Group-II granitoids are much higher than those from the Group-I granitoids (1.22~3.60 wt%) and the MPC (3.21~4.11 wt%). Titanite in the MPC has a low fluorine content (0.23~0.50 wt%), being less than those in the Group-I granitoids (2.28 wt%) and Group-II granitoids (1.85~2.78 wt%). Fluorine in allanite in the Group-II granitoids seems to have much lower contents than those from the Group-I granitoids and the MPC. Higher fluorine contents in the titanite from the Group-II granitoids may be mainly controlled by late-magmatic fluid-rock interaction processes associated with melt, but may not be indicative of original magma contents based on its petrographic feature. Due to very lower chlorine contents from all of accessory minerals, the authors suggest that titanite and apatite with higher fluorine contents in the Group-II granitoids have much lower H2O (OH) contents compared with those in the Group-I granitoids according to the partition among (F, Cl, OH). fluorine contents in whole-rock samples show a variation from the higher in the Group-I granitoids to the lower in the Group-II granitoids and the MPC, which are consistent with the changes of those from the biotite and hornblende as well as fluorite occurred in the Group-I granitoids reported previously. Based on the above study of fluorine in accessory minerals and combined with the previous fluorine contents from biotites and hornblendes, the authors suggest that apatites and titanites with higher F contents in the Group-II granitoids and the MPC may not be an indicator of higher fluorine contents in whole-rock, which reflect fluorine contents in magma sources and/or late-thermal activity. Higher fluorine contents in apatite, titanite and allanite may be an additional evidence of A-type affinity.

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