Fluid mixing in the generation of mesothermal gold mineralisation in the Transvaal Sequence, Transvaal, South Africa

M. R. Anderson; A. H. Rankin; B. Spiro

doi:10.1127/ejm/4/5/0933

Fluid mixing in the generation of mesothermal gold mineralisation in the Transvaal Sequence, Transvaal, South Africa

M. R. Anderson
, A. H. Rankin
, B. Spiro

Research output: Contribution to journal › Article › peer-review

Abstract

Fluid inclusion studies of auriferous quartz veins from a wide range of mineralised settings have revealed the presence of mixed inclusion assemblages. Saline, three-phase, CO₂-rich inclusions, with variable phase ratios and a range of densities, coexist with highly saline (NaCl-KCl-CaCl₂), aqueous inclusions containing little or no CO₂. This is interpreted to represent the heterogeneous trapping of two originally unrelated, partially miscible, end-member fluids in the system (CO₂-H₂O)-(H₂O-NaCl-KCl-CaCl₂). A model is proposed involving the interaction of an homogeneous, gold-bearing CO₂ -rich fluid of deep-seated (metamorphic/magmatic?) origin, and a saline, basinal (connate/intraformational?) brine. Gold deposition is throught to have been triggered by rapid changes in the physicochemical conditions of the system caused by the partial mixing of the two fluids. -from Authors

Original language	English
Pages (from-to)	933-948
Number of pages	16
Journal	European Journal of Mineralogy
Volume	4
Issue number	5
DOIs	https://doi.org/10.1127/ejm/4/5/0933
State	Published - 1992
Externally published	Yes

ASJC Scopus subject areas

Geochemistry and Petrology

Access to Document

10.1127/ejm/4/5/0933

Cite this

@article{04bfb06bab0243dbacd56baf637366a3,

title = "Fluid mixing in the generation of mesothermal gold mineralisation in the Transvaal Sequence, Transvaal, South Africa",

abstract = "Fluid inclusion studies of auriferous quartz veins from a wide range of mineralised settings have revealed the presence of mixed inclusion assemblages. Saline, three-phase, CO2-rich inclusions, with variable phase ratios and a range of densities, coexist with highly saline (NaCl-KCl-CaCl2), aqueous inclusions containing little or no CO2. This is interpreted to represent the heterogeneous trapping of two originally unrelated, partially miscible, end-member fluids in the system (CO2-H2O)-(H2O-NaCl-KCl-CaCl2). A model is proposed involving the interaction of an homogeneous, gold-bearing CO2 -rich fluid of deep-seated (metamorphic/magmatic?) origin, and a saline, basinal (connate/intraformational?) brine. Gold deposition is throught to have been triggered by rapid changes in the physicochemical conditions of the system caused by the partial mixing of the two fluids. -from Authors",

author = "Anderson, \{M. R.\} and Rankin, \{A. H.\} and B. Spiro",

year = "1992",

doi = "10.1127/ejm/4/5/0933",

language = "English",

volume = "4",

pages = "933--948",

journal = "European Journal of Mineralogy",

issn = "0935-1221",

publisher = "Copernicus Publications",

number = "5",

}

TY - JOUR

T1 - Fluid mixing in the generation of mesothermal gold mineralisation in the Transvaal Sequence, Transvaal, South Africa

AU - Anderson, M. R.

AU - Rankin, A. H.

AU - Spiro, B.

PY - 1992

Y1 - 1992

N2 - Fluid inclusion studies of auriferous quartz veins from a wide range of mineralised settings have revealed the presence of mixed inclusion assemblages. Saline, three-phase, CO2-rich inclusions, with variable phase ratios and a range of densities, coexist with highly saline (NaCl-KCl-CaCl2), aqueous inclusions containing little or no CO2. This is interpreted to represent the heterogeneous trapping of two originally unrelated, partially miscible, end-member fluids in the system (CO2-H2O)-(H2O-NaCl-KCl-CaCl2). A model is proposed involving the interaction of an homogeneous, gold-bearing CO2 -rich fluid of deep-seated (metamorphic/magmatic?) origin, and a saline, basinal (connate/intraformational?) brine. Gold deposition is throught to have been triggered by rapid changes in the physicochemical conditions of the system caused by the partial mixing of the two fluids. -from Authors

AB - Fluid inclusion studies of auriferous quartz veins from a wide range of mineralised settings have revealed the presence of mixed inclusion assemblages. Saline, three-phase, CO2-rich inclusions, with variable phase ratios and a range of densities, coexist with highly saline (NaCl-KCl-CaCl2), aqueous inclusions containing little or no CO2. This is interpreted to represent the heterogeneous trapping of two originally unrelated, partially miscible, end-member fluids in the system (CO2-H2O)-(H2O-NaCl-KCl-CaCl2). A model is proposed involving the interaction of an homogeneous, gold-bearing CO2 -rich fluid of deep-seated (metamorphic/magmatic?) origin, and a saline, basinal (connate/intraformational?) brine. Gold deposition is throught to have been triggered by rapid changes in the physicochemical conditions of the system caused by the partial mixing of the two fluids. -from Authors

UR - https://www.scopus.com/pages/publications/0027040122

U2 - 10.1127/ejm/4/5/0933

DO - 10.1127/ejm/4/5/0933

M3 - Article

AN - SCOPUS:0027040122

SN - 0935-1221

VL - 4

SP - 933

EP - 948

JO - European Journal of Mineralogy

JF - European Journal of Mineralogy

IS - 5

ER -

Fluid mixing in the generation of mesothermal gold mineralisation in the Transvaal Sequence, Transvaal, South Africa

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this