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The essence of time – fertile skarn formation in the Variscan Orogenic Belt.

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Title: The essence of time – fertile skarn formation in the Variscan Orogenic Belt.
Authors: Burisch, Mathias1 (AUTHOR) mathias.burisch@mineral.tu-freiberg.de, Gerdes, Axel2 (AUTHOR), Meinert, Lawrence D.3 (AUTHOR), Albert, Richard2 (AUTHOR), Seifert, Thomas1 (AUTHOR), Gutzmer, Jens4 (AUTHOR)
Source: Earth & Planetary Science Letters. Aug2019, Vol. 519, p165-170. 6p.
Subjects: Mineralization, Hercynian orogeny, Orogenic belts, Ore deposits, Prospecting, Metallogenic provinces, Geological time scales
Geographic Terms: Europe, United States, China
Abstract: Extending from Northern America to Central China the Variscan belt is a Paleozoic Orogen exceptionally well endowed in magmatic-hydrothermal ore deposits, including skarn deposits. Yet, the genesis of fertile skarns and their distinction from barren equivalents in orogenic zones is only poorly constrained. Here, we present innovative U-Pb laser-ablation inductively-coupled-plasma mass-spectrometry geochronology of garnet from different skarns in the Erzgebirge, a classic metallogenic province in central Europe. Garnet ages obtained not only constrain the timing of fertile skarn formation and associated Sn, W, Fe, Zn, Cu and In mineralization, but also clearly distinguish these from barren skarn bodies. We show that barren skarns formed during times of peak regional metamorphism at ∼340 Ma whereas mineralized skarns are temporally associated with late-orogenic magmatism at ∼325-313 Ma as well as post-orogenic magmatism at ∼308-295 Ma. The recognition of discrete mineralization events associated with the largest and economically most important skarn deposits provides valuable insight into the punctuated evolution of magmatic-hydrothermal systems in ancient collisional orogens on a regional scale; this has important implications to direct future mineral exploration. • Origin and genesis of skarns in orogenic zones. • Geodynamic evolution of hydrothermal mineral systems in orogenic belts. • Innovative U-Pb LA-ICP-MS geochronology of garnet. • Implications for exploration targeting. [ABSTRACT FROM AUTHOR]
Copyright of Earth & Planetary Science Letters is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
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  Data: <searchLink fieldCode="JN" term="%22Earth+%26+Planetary+Science+Letters%22">Earth & Planetary Science Letters</searchLink>. Aug2019, Vol. 519, p165-170. 6p.
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– Name: Abstract
  Label: Abstract
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  Data: Extending from Northern America to Central China the Variscan belt is a Paleozoic Orogen exceptionally well endowed in magmatic-hydrothermal ore deposits, including skarn deposits. Yet, the genesis of fertile skarns and their distinction from barren equivalents in orogenic zones is only poorly constrained. Here, we present innovative U-Pb laser-ablation inductively-coupled-plasma mass-spectrometry geochronology of garnet from different skarns in the Erzgebirge, a classic metallogenic province in central Europe. Garnet ages obtained not only constrain the timing of fertile skarn formation and associated Sn, W, Fe, Zn, Cu and In mineralization, but also clearly distinguish these from barren skarn bodies. We show that barren skarns formed during times of peak regional metamorphism at ∼340 Ma whereas mineralized skarns are temporally associated with late-orogenic magmatism at ∼325-313 Ma as well as post-orogenic magmatism at ∼308-295 Ma. The recognition of discrete mineralization events associated with the largest and economically most important skarn deposits provides valuable insight into the punctuated evolution of magmatic-hydrothermal systems in ancient collisional orogens on a regional scale; this has important implications to direct future mineral exploration. • Origin and genesis of skarns in orogenic zones. • Geodynamic evolution of hydrothermal mineral systems in orogenic belts. • Innovative U-Pb LA-ICP-MS geochronology of garnet. • Implications for exploration targeting. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Earth & Planetary Science Letters is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.epsl.2019.05.015
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 6
        StartPage: 165
    Subjects:
      – SubjectFull: Mineralization
        Type: general
      – SubjectFull: Hercynian orogeny
        Type: general
      – SubjectFull: Orogenic belts
        Type: general
      – SubjectFull: Ore deposits
        Type: general
      – SubjectFull: Prospecting
        Type: general
      – SubjectFull: Metallogenic provinces
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      – SubjectFull: Geological time scales
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      – SubjectFull: Europe
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      – SubjectFull: United States
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      – SubjectFull: China
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      – TitleFull: The essence of time – fertile skarn formation in the Variscan Orogenic Belt.
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              M: 08
              Text: Aug2019
              Type: published
              Y: 2019
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