Fluid mixing forms basement-hosted Pb-Zn deposits: Insight from metal and halogen chemistry of individual fluid inclusions

Tobias Fusswinkel, Thomas Wagner, M. Wälle, T. Wenzel, C.A. Heinrich, G. Markl

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Kuvaus

Fluid mixing across unconformities between crystalline basement and overlying sedimentary basins is commonly invoked as an efficient chemical mechanism for ore deposition, but the origin of basement brines and the process of ore formation have rarely been linked by direct evidence. Using LA-ICPMS microanalysis of individual fluid inclusions with an improved detection approach for anion components, we determined simultaneously the ore metal concentrations and the Cl/Br ratio in texturally well-constrained inclusion assemblages from a basement-hosted quartz-fluorite-barite-Pb-Zn vein system. An inverse correlation between the Pb+Zn concentrations and the Cl/Br mass ratios in the fluid inclusions provides clear evidence for mixing of a basement-derived metal-rich brine and a metal-poor formation water that acquired its salinity from halite dissolution in Triassic evaporites of the sedimentary cover. This mixing of two distinct brines with comparable salinity is recorded during the growth of individual quartz crystals containing small galena inclusions, demonstrating the transient and episodic nature of fluid mixing during mineral deposition.
Alkuperäiskielienglanti
LehtiGeology
Vuosikerta41
Numero6
Sivut679-682
Sivumäärä4
ISSN0091-7613
DOI - pysyväislinkit
TilaJulkaistu - 2013
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Tieteenalat

  • 1171 Geotieteet

Lainaa tätä

Fusswinkel, Tobias ; Wagner, Thomas ; Wälle, M. ; Wenzel, T. ; Heinrich, C.A. ; Markl, G. / Fluid mixing forms basement-hosted Pb-Zn deposits: Insight from metal and halogen chemistry of individual fluid inclusions. Julkaisussa: Geology. 2013 ; Vuosikerta 41, Nro 6. Sivut 679-682.
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title = "Fluid mixing forms basement-hosted Pb-Zn deposits: Insight from metal and halogen chemistry of individual fluid inclusions",
abstract = "Fluid mixing across unconformities between crystalline basement and overlying sedimentary basins is commonly invoked as an efficient chemical mechanism for ore deposition, but the origin of basement brines and the process of ore formation have rarely been linked by direct evidence. Using LA-ICPMS microanalysis of individual fluid inclusions with an improved detection approach for anion components, we determined simultaneously the ore metal concentrations and the Cl/Br ratio in texturally well-constrained inclusion assemblages from a basement-hosted quartz-fluorite-barite-Pb-Zn vein system. An inverse correlation between the Pb+Zn concentrations and the Cl/Br mass ratios in the fluid inclusions provides clear evidence for mixing of a basement-derived metal-rich brine and a metal-poor formation water that acquired its salinity from halite dissolution in Triassic evaporites of the sedimentary cover. This mixing of two distinct brines with comparable salinity is recorded during the growth of individual quartz crystals containing small galena inclusions, demonstrating the transient and episodic nature of fluid mixing during mineral deposition.",
keywords = "1171 Geosciences",
author = "Tobias Fusswinkel and Thomas Wagner and M. W{\"a}lle and T. Wenzel and C.A. Heinrich and G. Markl",
year = "2013",
doi = "10.1130/G34092.1",
language = "English",
volume = "41",
pages = "679--682",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "6",

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Fluid mixing forms basement-hosted Pb-Zn deposits: Insight from metal and halogen chemistry of individual fluid inclusions. / Fusswinkel, Tobias; Wagner, Thomas; Wälle, M.; Wenzel, T.; Heinrich, C.A.; Markl, G.

julkaisussa: Geology, Vuosikerta 41, Nro 6, 2013, s. 679-682.

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

TY - JOUR

T1 - Fluid mixing forms basement-hosted Pb-Zn deposits: Insight from metal and halogen chemistry of individual fluid inclusions

AU - Fusswinkel, Tobias

AU - Wagner, Thomas

AU - Wälle, M.

AU - Wenzel, T.

AU - Heinrich, C.A.

AU - Markl, G.

PY - 2013

Y1 - 2013

N2 - Fluid mixing across unconformities between crystalline basement and overlying sedimentary basins is commonly invoked as an efficient chemical mechanism for ore deposition, but the origin of basement brines and the process of ore formation have rarely been linked by direct evidence. Using LA-ICPMS microanalysis of individual fluid inclusions with an improved detection approach for anion components, we determined simultaneously the ore metal concentrations and the Cl/Br ratio in texturally well-constrained inclusion assemblages from a basement-hosted quartz-fluorite-barite-Pb-Zn vein system. An inverse correlation between the Pb+Zn concentrations and the Cl/Br mass ratios in the fluid inclusions provides clear evidence for mixing of a basement-derived metal-rich brine and a metal-poor formation water that acquired its salinity from halite dissolution in Triassic evaporites of the sedimentary cover. This mixing of two distinct brines with comparable salinity is recorded during the growth of individual quartz crystals containing small galena inclusions, demonstrating the transient and episodic nature of fluid mixing during mineral deposition.

AB - Fluid mixing across unconformities between crystalline basement and overlying sedimentary basins is commonly invoked as an efficient chemical mechanism for ore deposition, but the origin of basement brines and the process of ore formation have rarely been linked by direct evidence. Using LA-ICPMS microanalysis of individual fluid inclusions with an improved detection approach for anion components, we determined simultaneously the ore metal concentrations and the Cl/Br ratio in texturally well-constrained inclusion assemblages from a basement-hosted quartz-fluorite-barite-Pb-Zn vein system. An inverse correlation between the Pb+Zn concentrations and the Cl/Br mass ratios in the fluid inclusions provides clear evidence for mixing of a basement-derived metal-rich brine and a metal-poor formation water that acquired its salinity from halite dissolution in Triassic evaporites of the sedimentary cover. This mixing of two distinct brines with comparable salinity is recorded during the growth of individual quartz crystals containing small galena inclusions, demonstrating the transient and episodic nature of fluid mixing during mineral deposition.

KW - 1171 Geosciences

U2 - 10.1130/G34092.1

DO - 10.1130/G34092.1

M3 - Article

VL - 41

SP - 679

EP - 682

JO - Geology

JF - Geology

SN - 0091-7613

IS - 6

ER -