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@article{2393108,
author = {Dolníček, Zdeněk and Krejčí Kotlánová, Michaela and Ulmanová, Jana and Sejkora, Jiří},
article_number = {1},
doi = {http://dx.doi.org/10.3390/min14010001},
keywords = {diagenetic alteration; heavy minerals; sandstone diagenesis; ilmenite alteration; garnet dissolution; HFSE mobility; REE mobility; TiO2 minerals; apatite; Ra & ccaron;a Unit},
language = {eng},
issn = {2075-163X},
journal = {Minerals},
title = {Remobilization of HFSE, Y, and REE during Diagenetic Alteration of Heavy Minerals in Sandstones from the Chvalčov Site, Flysch Belt of the Outer Western Carpathians, Czech Republic},
url = {https://www.mdpi.com/2075-163X/14/1/1},
volume = {14},
year = {2024}
}
TY - JOUR
ID - 2393108
AU - Dolníček, Zdeněk - Krejčí Kotlánová, Michaela - Ulmanová, Jana - Sejkora, Jiří
PY - 2024
TI - Remobilization of HFSE, Y, and REE during Diagenetic Alteration of Heavy Minerals in Sandstones from the Chvalčov Site, Flysch Belt of the Outer Western Carpathians, Czech Republic
JF - Minerals
VL - 14
IS - 1
SP - 1-20
EP - 1-20
PB - MDPI
SN - 2075163X
KW - diagenetic alteration
KW - heavy minerals
KW - sandstone diagenesis
KW - ilmenite alteration
KW - garnet dissolution
KW - HFSE mobility
KW - REE mobility
KW - TiO2 minerals
KW - apatite
KW - Ra &
KW - ccaron;a Unit
UR - https://www.mdpi.com/2075-163X/14/1/1
N2 - An in situ electron microprobe study of detrital minerals yielded important insights into the diagenetic history of the Cretaceous-to-Paleogene flysch sandstones from the Chvalčov site, Rača Unit, Flysch Belt of the Outer Western Carpathians. Detrital titanite and a Fe-Ti mineral (probably ilmenite) were almost completely altered to TiO2 minerals, which also newly crystallized in intergranular spaces of sandstone. Brookite, anatase, and, exceptionally, rutile were identified by Raman spectroscopy. Authigenic TiO2 phases show complex composition with occasionally elevated contents of Fe, Nb, Zr, V, Sc, Cr, Al, Y, and/or P, which were likely sourced from altered neighboring heavy minerals. In addition, rare authigenic LREE- and Y-enriched apatite rims were observed on detrital apatite. The remobilization of REE, Y, and HFSE was likely mediated by acidic early diagenetic fluids enriched in fluoride and sulfate anions. The superimposed formation of calcite cement was associated with the dissolution of detrital garnet, feldspars, and quartz. The compositions of detrital apatite and garnet (Alm60-82Prp4-30Sps0-24Grs0-19) are comparable with those from adjacent parts of the Flysch Belt. Detrital rutile is enriched in Nb, V, Cr, and Zr. Our study illustrates the intensity of diagenetic alteration of detrital minerals in flysch sandstones as well as the usefulness of in-situ electron-microprobe investigations for the recognition of processes influencing heavy minerals in diagenetically altered sediments.
ER -
DOLNÍČEK, Zdeněk, Michaela KREJČÍ KOTLÁNOVÁ, Jana ULMANOVÁ and Jiří SEJKORA. Remobilization of HFSE, Y, and REE during Diagenetic Alteration of Heavy Minerals in Sandstones from the Chvalčov Site, Flysch Belt of the Outer Western Carpathians, Czech Republic. \textit{Minerals}. MDPI, 2024, vol.~14, No~1, p.~1-20. ISSN~2075-163X. Available from: https://dx.doi.org/10.3390/min14010001.
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