Mineral chemistry of the Geyer SW tin skarn deposit: understanding variable fluid/rock ratios and metal fluxes.
Saved in:
| Title: | Mineral chemistry of the Geyer SW tin skarn deposit: understanding variable fluid/rock ratios and metal fluxes. |
|---|---|
| Authors: | Meyer, Nicolas1 (AUTHOR) nicolas.meyer@uni-tuebingen.de, Burisch, Mathias2 (AUTHOR) burisch@mines.edu, Gutzmer, Jens3 (AUTHOR), Krause, Joachim3 (AUTHOR), Scheibert, Henning4 (AUTHOR), Markl, Gregor1 (AUTHOR) |
| Source: | Mineralium Deposita. Jan2025, Vol. 60 Issue 1, p85-111. 27p. |
| Subject Terms: | *Sulfide minerals, *Chlorite minerals, *Earth sciences, *Cassiterite, *Sphene, *Garnet, *Trace elements |
| Abstract: | The Geyer tin skarn in the Erzgebirge, Germany, comprises an early skarnoid stage (stage I, ~ 320 Ma) and a younger metasomatic stage (stage II, ~ 305 Ma), but yet, the source and distribution of Sn and the physicochemical conditions of skarn alteration were not constrained. Our results illustrate that contact metamorphic skarnoids of stage I contain only little Sn. REE patterns and elevated concentrations of HFSE indicate that garnet, titanite and vesuvianite of stage I formed under rock-buffered conditions (low fluid/rock ratios). Prograde assemblages of stage II, in contrast, contain two generations of stanniferous garnet, titanite-malayaite and vesuvianite. Oscillation between rock-buffered and fluid-buffered conditions are marked by variable concentrations of HFSE, W, In, and Sn in metasomatic garnet. Trace and REE element signatures of minerals formed under high fluid/rock ratios appear to mimic the signature of the magmatic-hydrothermal fluid which gave rise to metasomatic skarn alteration. Concomitantly with lower fluid-rock ratio, tin was remobilized from Sn-rich silicates and re-precipitated as malayaite. Ingress of meteoric water and decreasing temperatures towards the end of stage II led to the formation of cassiterite, low-Sn amphibole, chlorite, and sulfide minerals. Minor and trace element compositions of cassiterite do not show much variation, even if host rock and gangue minerals vary significantly, suggesting a predominance of a magmatic-hydrothermal fluid and high fluid/rock ratios. The mineral chemistry of major skarn-forming minerals, hence, records the change in the fluid/rock ratio, and the arrival, distribution, and remobilization of tin by magmatic fluids in polyphase tin skarn systems. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
|---|---|
| Header | DbId: enr DbLabel: Energy & Power Source An: 182154314 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Mineral chemistry of the Geyer SW tin skarn deposit: understanding variable fluid/rock ratios and metal fluxes. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Meyer%2C+Nicolas%22">Meyer, Nicolas</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> nicolas.meyer@uni-tuebingen.de</i><br /><searchLink fieldCode="AR" term="%22Burisch%2C+Mathias%22">Burisch, Mathias</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> burisch@mines.edu</i><br /><searchLink fieldCode="AR" term="%22Gutzmer%2C+Jens%22">Gutzmer, Jens</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Krause%2C+Joachim%22">Krause, Joachim</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Scheibert%2C+Henning%22">Scheibert, Henning</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Markl%2C+Gregor%22">Markl, Gregor</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Mineralium+Deposita%22">Mineralium Deposita</searchLink>. Jan2025, Vol. 60 Issue 1, p85-111. 27p. – Name: Subject Label: Subject Terms Group: Su Data: *<searchLink fieldCode="DE" term="%22Sulfide+minerals%22">Sulfide minerals</searchLink><br />*<searchLink fieldCode="DE" term="%22Chlorite+minerals%22">Chlorite minerals</searchLink><br />*<searchLink fieldCode="DE" term="%22Earth+sciences%22">Earth sciences</searchLink><br />*<searchLink fieldCode="DE" term="%22Cassiterite%22">Cassiterite</searchLink><br />*<searchLink fieldCode="DE" term="%22Sphene%22">Sphene</searchLink><br />*<searchLink fieldCode="DE" term="%22Garnet%22">Garnet</searchLink><br />*<searchLink fieldCode="DE" term="%22Trace+elements%22">Trace elements</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The Geyer tin skarn in the Erzgebirge, Germany, comprises an early skarnoid stage (stage I, ~ 320 Ma) and a younger metasomatic stage (stage II, ~ 305 Ma), but yet, the source and distribution of Sn and the physicochemical conditions of skarn alteration were not constrained. Our results illustrate that contact metamorphic skarnoids of stage I contain only little Sn. REE patterns and elevated concentrations of HFSE indicate that garnet, titanite and vesuvianite of stage I formed under rock-buffered conditions (low fluid/rock ratios). Prograde assemblages of stage II, in contrast, contain two generations of stanniferous garnet, titanite-malayaite and vesuvianite. Oscillation between rock-buffered and fluid-buffered conditions are marked by variable concentrations of HFSE, W, In, and Sn in metasomatic garnet. Trace and REE element signatures of minerals formed under high fluid/rock ratios appear to mimic the signature of the magmatic-hydrothermal fluid which gave rise to metasomatic skarn alteration. Concomitantly with lower fluid-rock ratio, tin was remobilized from Sn-rich silicates and re-precipitated as malayaite. Ingress of meteoric water and decreasing temperatures towards the end of stage II led to the formation of cassiterite, low-Sn amphibole, chlorite, and sulfide minerals. Minor and trace element compositions of cassiterite do not show much variation, even if host rock and gangue minerals vary significantly, suggesting a predominance of a magmatic-hydrothermal fluid and high fluid/rock ratios. The mineral chemistry of major skarn-forming minerals, hence, records the change in the fluid/rock ratio, and the arrival, distribution, and remobilization of tin by magmatic fluids in polyphase tin skarn systems. [ABSTRACT FROM AUTHOR] |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=enr&AN=182154314 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00126-024-01297-w Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 27 StartPage: 85 Subjects: – SubjectFull: Sulfide minerals Type: general – SubjectFull: Chlorite minerals Type: general – SubjectFull: Earth sciences Type: general – SubjectFull: Cassiterite Type: general – SubjectFull: Sphene Type: general – SubjectFull: Garnet Type: general – SubjectFull: Trace elements Type: general Titles: – TitleFull: Mineral chemistry of the Geyer SW tin skarn deposit: understanding variable fluid/rock ratios and metal fluxes. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Meyer, Nicolas – PersonEntity: Name: NameFull: Burisch, Mathias – PersonEntity: Name: NameFull: Gutzmer, Jens – PersonEntity: Name: NameFull: Krause, Joachim – PersonEntity: Name: NameFull: Scheibert, Henning – PersonEntity: Name: NameFull: Markl, Gregor IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 01 Text: Jan2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 00264598 Numbering: – Type: volume Value: 60 – Type: issue Value: 1 Titles: – TitleFull: Mineralium Deposita Type: main |
| ResultId | 1 |
