EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS
ROLE IN FLUID MIGRATION IN ROCKS

J 2016

EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS

BENEDOVÁ, Šárka a Jaromír LEICHMANN

Základní údaje

Originální název

EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS

Autoři

BENEDOVÁ, Šárka (203 Česká republika, domácí) a Jaromír LEICHMANN (203 Česká republika, garant, domácí)

Vydání

Acta Geodynamica et Geomaterialia, Praha, Academy of Science of the Czech Republic, 2016, 1214-9705

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Impakt faktor

Impact factor: 0.699

Kód RIV

RIV/00216224:14310/16:00093876

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.13168/AGG.2016.0001

UT WoS

000377623200008

Klíčová slova česky

Rozpouštění křemene, krystalové plochy, mechanické defekty, metasomatoza, alterace

Klíčová slova anglicky

Quartz dissolution; Crystal faces; Mechanical defects; Metasomatism; Alteration

Štítky

AKR, rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 5. 4. 2017 18:35, Ing. Andrea Mikešková

Anotace

V originále

Quartz dissolution in hydrothermal-metasomatic processes is common feature in magmatic and metamorphic quartz rich rocks. This experimental work aims to compare the dissolution of individual quartz faces and to clarify the role of mechanical defects in quartz grain dissolution. Two types of experiments were made to define the dissolution anisotropy: hydrothermal experiments (quartz-distilled water) and chemical dissolution (quartz - 40 % hydrofluoric acid). Hydrothermal experiments using various types of quartz samples as well as chemical dissolution of quartz faces show that quartz dissolution is an anisotropic process. The solubility of rhombs is higher than that of prism faces. At lower temperatures the separated etch pits develop and with increasing temperature the etch pits start to link and the continuous striations (prisms) or overlapping arrows (rhombs) are observed. Such a surface structure may facilitate fluid migration through a solid rock. An experiment using a mechanically disrupted surface of the quartz crystal shows the decisive role of this defect on the dissolution. Fluid migration through rocks can then be strongly influenced for instance by brittle deformation, to which quartz with no cleavage is easily susceptible. Such defects additionally enhance fluid movement through rocks, which plays a decisive role during hydrothermal-metasomatic quartz dissolution.

Citovat

BENEDOVÁ, Šárka a Jaromír LEICHMANN. EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS. Acta Geodynamica et Geomaterialia. Praha: Academy of Science of the Czech Republic, 2016, roč. 13, č. 2, s. 193-200. ISSN 1214-9705. Dostupné z: https://dx.doi.org/10.13168/AGG.2016.0001.

@article{1375212,
   author = {Benedová, Šárka and Leichmann, Jaromír},
   article_location = {Praha},
   article_number = {2},
   doi = {http://dx.doi.org/10.13168/AGG.2016.0001},
   keywords = {Quartz dissolution; Crystal faces; Mechanical defects; Metasomatism; Alteration},
   language = {eng},
   issn = {1214-9705},
   journal = {Acta Geodynamica et Geomaterialia},
   title = {EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS},
   volume = {13},
   year = {2016}
}

TY  - JOUR
ID  - 1375212
AU  - Benedová, Šárka - Leichmann, Jaromír
PY  - 2016
TI  - EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS
JF  - Acta Geodynamica et Geomaterialia
VL  - 13
IS  - 2
SP  - 193-200
EP  - 193-200
PB  - Academy of Science of the Czech Republic
SN  - 12149705
KW  - Quartz dissolution
KW  - Crystal faces
KW  - Mechanical defects
KW  - Metasomatism
KW  - Alteration
N2  - Quartz dissolution in hydrothermal-metasomatic processes is common feature in magmatic and metamorphic quartz rich rocks. This experimental work aims to compare the dissolution of individual quartz faces and to clarify the role of mechanical defects in quartz grain dissolution. Two types of experiments were made to define the dissolution anisotropy: hydrothermal experiments (quartz-distilled water) and chemical dissolution (quartz - 40 % hydrofluoric acid). Hydrothermal experiments using various types of quartz samples as well as chemical dissolution of quartz faces show that quartz dissolution is an anisotropic process. The solubility of rhombs is higher than that of prism faces. At lower temperatures the separated etch pits develop and with increasing temperature the etch pits start to link and the continuous striations (prisms) or overlapping arrows (rhombs) are observed. Such a surface structure may facilitate fluid migration through a solid rock. An experiment using a mechanically disrupted surface of the quartz crystal shows the decisive role of this defect on the dissolution. Fluid migration through rocks can then be strongly influenced for instance by brittle deformation, to which quartz with no cleavage is easily susceptible. Such defects additionally enhance fluid movement through rocks, which plays a decisive role during hydrothermal-metasomatic quartz dissolution.
ER  -

BENEDOVÁ, Šárka a Jaromír LEICHMANN. EXPERIMENTAL STUDY OF ANISOTROPY OF QUARTZ DISSOLUTION AND ITS ROLE IN FLUID MIGRATION IN ROCKS. \textit{Acta Geodynamica et Geomaterialia}. Praha: Academy of Science of the Czech Republic, 2016, roč.~13, č.~2, s.~193-200. ISSN~1214-9705. Dostupné z: https://dx.doi.org/10.13168/AGG.2016.0001.

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