Two stages of skarn formation in the Hämmerlein tin-skarn deposit, western Erzgebirge, Germany
Two stages of skarn formation in the Hämmerlein tin-skarn deposit, western Erzgebirge, Germany
The Hämmerlein Sn-skarn deposit of the western Erzgebirge is hosted in early Palaeozoic schists and gneisses and is closely associated with one of the most voluminous granite intrusions of the Erzgebirge, the Eibenstock granite. The main valuable ore mineral in Hämmerlein is cassiterite which is disseminated in the four types of skarn occurring in the deposit, i.e., garnet, amphibole, pyroxene, and magnetite skarn. There are two scenarios for deposit formation: (1) formation of the skarn during the regional metamorphism at 340 Ma followed by mineralization during granite emplacement at 320 Ma and (2) skarn formation and mineralization directly related to the granite intrusion. Theriak-Domino thermodynamic P-T-XCO2 modelling shows that both scenarios are possible for the formation of the skarn series, but as the Rb-Sr muscovite-based age of skarn samples is 340 Ma, the first scenario is the relevant one. The skarn mineral assemblages formed during regional metamorphism, whereas cassiterite mineralization is related to younger granite emplacement and is associated with chloritization of biotite and precipitation of fluorite. These reactions changed the fluid composition and induced cassiterite mineralization.
1305-1308
Lefebvre-Desanois, Marie
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Romer, Rolf L.
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Glodny, Johannes
02581e85-51ed-4be8-a816-c2334bbb4459
Roscher, Marco
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20 August 2017
Lefebvre-Desanois, Marie
b9ca8d27-8ab9-4a72-b4e4-39defc53aa85
Romer, Rolf L.
4b7f8a1e-0f1f-48fc-870c-6febe58617fd
Glodny, Johannes
02581e85-51ed-4be8-a816-c2334bbb4459
Roscher, Marco
a750f923-bae8-4a0b-ad22-9c0d81b53467
Lefebvre-Desanois, Marie, Romer, Rolf L., Glodny, Johannes and Roscher, Marco
(2017)
Two stages of skarn formation in the Hämmerlein tin-skarn deposit, western Erzgebirge, Germany.
SGA Biennial Meeting, , Quebec, Canada.
20 - 23 Aug 2017.
.
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Conference or Workshop Item
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Abstract
The Hämmerlein Sn-skarn deposit of the western Erzgebirge is hosted in early Palaeozoic schists and gneisses and is closely associated with one of the most voluminous granite intrusions of the Erzgebirge, the Eibenstock granite. The main valuable ore mineral in Hämmerlein is cassiterite which is disseminated in the four types of skarn occurring in the deposit, i.e., garnet, amphibole, pyroxene, and magnetite skarn. There are two scenarios for deposit formation: (1) formation of the skarn during the regional metamorphism at 340 Ma followed by mineralization during granite emplacement at 320 Ma and (2) skarn formation and mineralization directly related to the granite intrusion. Theriak-Domino thermodynamic P-T-XCO2 modelling shows that both scenarios are possible for the formation of the skarn series, but as the Rb-Sr muscovite-based age of skarn samples is 340 Ma, the first scenario is the relevant one. The skarn mineral assemblages formed during regional metamorphism, whereas cassiterite mineralization is related to younger granite emplacement and is associated with chloritization of biotite and precipitation of fluorite. These reactions changed the fluid composition and induced cassiterite mineralization.
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Published date: 20 August 2017
Venue - Dates:
SGA Biennial Meeting, , Quebec, Canada, 2017-08-20 - 2017-08-23
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Local EPrints ID: 449785
URI: http://eprints.soton.ac.uk/id/eprint/449785
PURE UUID: a74e13db-da2f-4370-aa92-0a6cffd91ee6
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Date deposited: 17 Jun 2021 16:31
Last modified: 23 Feb 2023 03:24
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Contributors
Author:
Marie Lefebvre-Desanois
Author:
Rolf L. Romer
Author:
Johannes Glodny
Author:
Marco Roscher
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