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@article{1229296,
author = {Xie, Lei and Wang, RuandCheng and Groat, Lee A. and Zhu, JinandChu and Huang, FangandFang and Cempírek, Jan},
article_location = {Amsterdam},
article_number = {4},
doi = {http://dx.doi.org/10.1016/j.oregeorev.2014.08.013},
keywords = {Tin mineralization; Li-bearing mica; Cassiterite; Rutile; Fluorine; Immiscible fluid system; Qitianling},
language = {eng},
issn = {0169-1368},
journal = {Ore Geology Reviews},
note = {Žádný z autorů nemá afiliaci na MU.},
title = {A combined EMPA and LA-ICP-MS study of Li-bearing mica and Sn-Ti oxide minerals from the Qiguling topaz rhyolite (Qitianling District, China): The role of fluorine in origin of tin mineralization},
url = {https://www.sciencedirect.com/science/article/pii/S0169136814002030},
volume = {65},
year = {2015}
}
TY - JOUR
ID - 1229296
AU - Xie, Lei - Wang, Ru-Cheng - Groat, Lee A. - Zhu, Jin-Chu - Huang, Fang-Fang - Cempírek, Jan
PY - 2015
TI - A combined EMPA and LA-ICP-MS study of Li-bearing mica and Sn-Ti oxide minerals from the Qiguling topaz rhyolite (Qitianling District, China): The role of fluorine in origin of tin mineralization
JF - Ore Geology Reviews
VL - 65
IS - 4
SP - 779-792
EP - 779-792
PB - Elsevier Science Inc.
SN - 01691368
N1 - Žádný z autorů nemá afiliaci na MU.
KW - Tin mineralization
KW - Li-bearing mica
KW - Cassiterite
KW - Rutile
KW - Fluorine
KW - Immiscible fluid system
KW - Qitianling
UR - https://www.sciencedirect.com/science/article/pii/S0169136814002030
N2 - The Sn-rich Qiguling topaz rhyolite dike intrudes the Qitianling biotite granite of the Nanling Range in southern China; the granite hosts the large Furong Sn deposit. The rhyolite dike is typically peraluminous, volatile-enriched, and highly evolved. Whole-rock F and Sn concentrations attain 1.9 wt.% and 2700 ppm, respectively. Cassiterite and rutile are the only Sn and Ti minerals; both cassiterite and Nb-rich rutile are commonly included in the phenocrysts. The Sn-Ti-F assemblage is pervasive, and contains spongy cassiterite in some cases; cassiterite also occurs in quartz veinlets which cut the groundmass. Electron microprobe and LA-ICP-MS compositions were used to study the magmatic and hydrothermal processes and the role of F in Sn mineralization. The presence of zinnwaldite and "Mus-Ann", which are respectively representative of early and late mica crystallization during magma differentiation, also suggests a significant decrease in f(HF)/f(H2O) of the system. Cassiterite included in the zinnwaldite phenocrysts is suggested to have crystallized from the primary magma at high temperature. Within the Sn-Ti-F aggregates, rutile crystallized as the earliest mineral, followed by fluorite and cassiterite. Spongy cassiterite containing inclusions of the groundmass minerals indicate a low viscosity of the late fluid. The cassiterite in the quartz veinlets crystallized from low-temperature hydrothermal fluids, which possibly mixed with meteoric water. In general, cassiterite precipitated during both magmatic and hydrothermal stages, and over a range of temperatures. The original fluorine and tin enrichments,f(HF)/f(H2O) change in the residual magma, formation of Ca,Sn,F-rich immiscible fluid, decrease of the f(HF) during groundmass crystallization, and mixing of magma-derived fluids with low-saline meteoric water during the late hydrothermal stage, are all factors independently or together responsible for the Sn mineralization in the Qiguling rhyolite.
ER -
XIE, Lei, Ru-Cheng WANG, Lee A. GROAT, Jin-Chu ZHU, Fang-Fang HUANG a Jan CEMPÍREK. A combined EMPA and LA-ICP-MS study of Li-bearing mica and Sn-Ti oxide minerals from the Qiguling topaz rhyolite (Qitianling District, China): The role of fluorine in origin of tin mineralization. \textit{Ore Geology Reviews}. Amsterdam: Elsevier Science Inc., 2015, roč.~65, č.~4, s.~779-792. ISSN~0169-1368. Dostupné z: https://dx.doi.org/10.1016/j.oregeorev.2014.08.013.
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