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 and Jaromír LEICHMANN

Basic information

Original name

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

Authors

BENEDOVÁ, Šárka (203 Czech Republic, belonging to the institution) and Jaromír LEICHMANN (203 Czech Republic, guarantor, belonging to the institution)

Edition

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

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10500 1.5. Earth and related environmental sciences

Country of publisher

Czech Republic

Confidentiality degree

není předmětem státního či obchodního tajemství

Impact factor

Impact factor: 0.699

RIV identification code

RIV/00216224:14310/16:00093876

Organization unit

Faculty of Science

DOI

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

UT WoS

000377623200008

Keywords (in Czech)

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

Keywords in English

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

Abstract

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 and 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, vol. 13, No 2, p. 193-200. ISSN 1214-9705. Available from: 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 and 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, vol.~13, No~2, p.~193-200. ISSN~1214-9705. Available from: https://dx.doi.org/10.13168/AGG.2016.0001.

Detailed Information on Publication Record