The Hämmerlein skarn-hosted polymetallic deposit and the Eibenstock granite associated greisen, western Erzgebirge, Germany: two phases of mineralization—two Sn sources

Lefebvre, Marie G.; Romer, Rolf L.; Glodny, Johannes; Kroner, Uwe; Roscher, Marco

doi:10.1007/s00126-018-0830-4

Cited by 22 publications

(8 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such relationships be-tween different intrusive rocks were also observed in the nearby massifs of Marimanya (Palau i Ramirez 1998) and Cauterets (Reyx 1973). Similar observations were made at Hämmerlein (Lefebvre et al 2018) or Los Santos in Spain (Timon Sanchez et al 2009), where different granites were emplaced within a time gap of ca. 10 Ma.…”

Section: Nature Of the Fluidssupporting

confidence: 79%

The polyphase evolution of a late Variscan W/Au deposit (Salau, French Pyrenees): insights from REE and U/Pb LA-ICP-MS analyses

et al. 2019

View full text Add to dashboard Cite

The Salau deposit, located in the Axial Zone of the French Pyrenees, is the most important tungsten deposit ever mined in France. Two types of mineralization, both closely associated with a granodiorite intrusion, are distinguished. The first is a fine-grained scheelite skarn related to contact metamorphic and metasomatism between the intrusion and the adjacent carbonate rocks. The second type is represented by massive sulfides accompanied by coarse-grained scheelite, apatite, and electrum. This syn-kinematic mineralization is found enclosed within the skarn ore but occurs also within the granodiorite stock along major ductile-brittle shear zones. REE contents of scheelite and apatite from the two types of mineralization show differences sug-gesting that the two types derived from two different fluids. U/Pb dating on zircon, apatite and scheelite illustrates that magmatic zircon and apatite formed at 295 ± 2 Ma during emplacement and cooling of the granodiorite intrusion. These are cogenetic to the fine-grained scheelite skarn. Hydrothermal apatite from massive sulfide ores yields a younger age of 289 ± 2 Ma, whereas closely associated coarse-grained scheelite yields a consistent although less precise age of 284 ± 11 Ma. These results suggest that the late massive sulfide ore with abundant coarse-grained scheelite and electrum is related to the emplacement of an underlying, more evolved intrusion, accompanied during its ascent by the development of steeply dipping reversedextral shear zones.

show abstract

Section: Nature Of the Fluidssupporting

confidence: 79%

The polyphase evolution of a late Variscan W/Au deposit (Salau, French Pyrenees): insights from REE and U/Pb LA-ICP-MS analyses

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The internal zones of the Variscan Orogenic Belt of central and western Europe are an excellent example as they are host to several prolific Sn-W provinces. It has been widely assumed that formation of magmatic-hydrothermal ore deposits in these provinces is constrained to a narrow interval of ≤ 15 Ma (e.g., Bouchot et al 2005;Cuney et al 2002;Lefebvre et al 2019;Romer et al 2007;Zhang et al 2017) coinciding with intense magmatism during post-collisional extension (Förster et al 1999). This is in contrast to several recent studies suggesting that magmatic-hydrothermal Sn-W-polymetallic mineralization formed episodically over a time span of more than 40 Ma (Burisch et al 2019b;Harlaux et al 2018;Moscati and Neymark 2020;Kroner 2015, 2016;Timón-Sánchez et al 2019;Zhang et al 2019).…”

Section: Introductionmentioning

confidence: 94%

“…Published geochronological data related to magmatic-hydrothermal mineralization spans ages from ~ 326 to 276 Ma (cf. Burisch et al 2019b;Lefebvre et al 2019;Ostendorf et al 2019;Romer et al 2007;Zhang et al 2017). The time window in which Sn-W(± Mo) greisen deposits formed has previously been constrained to 326 to 318 Ma (Lefebvre et al 2019;Romer et al 2007;Zhang et al 2017), which coincides with the emplacement of late-collisional highly fractionated peraluminous Li-mica granites (Förster et al 1999;Tichomirowa et al 2019).…”

Section: The Erzgebirgementioning

confidence: 99%

“…The formation of metal-endowed skarns is by no means related exclusively to the emplacement of late-collisional Li-mica granites as often assumed in previous studies (cf. Förster et al 1999;Lefebvre et al 2019;Romer et al 2007;Zhang et al 2017). Instead, skarn formation in the Schwarzenberg District occurred episodically within a broad time interval of up to ~ 40 Ma.…”

Section: Timing Of Skarn Formation In the Schwarzenberg Districtmentioning

confidence: 99%

See 1 more Smart Citation

Timing of magmatic-hydrothermal activity in the Variscan Orogenic Belt: LA-ICP-MS U–Pb geochronology of skarn-related garnet from the Schwarzenberg District, Erzgebirge

et al. 2022

View full text Add to dashboard Cite

Here, we present in situ U–Pb laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) ages of andradite-grossular garnet from four magmatic-hydrothermal polymetallic skarn prospects in the Schwarzenberg District, Erzgebirge (Germany), located in the internal zone of the Variscan Orogenic Belt. Within the geochronological framework of igneous rocks and hydrothermal mineralization in the Erzgebirge, the obtained garnet ages define three distinct episodes of Variscan skarn formation: (I) early late-collisional mineralization (338–331 Ma) recording the onset of magmatic-hydrothermal fluid flow shortly after the peak metamorphic event, (II) late-collisional mineralization (~ 327–310 Ma) related to the emplacement of large peraluminous granites following large-scale extension caused by orogenic collapse and (III) post-collisional mineralization (~ 310–295 Ma) contemporaneous with widespread volcanism associated with Permian crustal reorganization. Our results demonstrate that the formation of skarns in the Schwarzenberg District occurred episodically in all sub-stages of the Variscan orogenic cycle over a time range of at least 40 Ma. This observation is consistent with the age range of available geochronological data related to magmatic-hydrothermal ore deposits from other internal zones of the Variscan Orogenic Belt in central and western Europe. In analogy to the time–space relationship of major porphyry-Cu belts in South America, the congruent magmatic-hydrothermal evolution in the internal zones and the distinctly later (by ~ 30 Ma) occurrence of magmatic-hydrothermal ore deposits in the external zones of the Variscan Orogenic Belt may be interpreted as a function of their tectonic position relative to the Variscan collisional front.

show abstract

“…During the last twenty years, new metallogenic models have been proposed, such as the Intrusion Related Gold Deposit model (Lang and Baker, 2001;Hart, 2007) or the Carlin type gold deposit model (Kesler et al, 2005), in particular thanks to the use of innovative techniques which enable to re-examine known deposits: isotopic geochemistry (Raju et al, 2015;Mao et al, 2016), geochronology (Charles et al, 2013;Ballouard et al, 2017;Harlaux et al, 2018), thermicity (Delchini et al, 2016;Poitrenaud, 2018) or 3D modeling (Cowan, 2020). The complexity of the deposits often reveals a polyphase of the mineralization, previously often described as resulting from a single mineralizing event (Lefebvre et al, 2018). Although comprising numerous historically exploited deposits and a significant mining potential, the Pyrenean segment of the Western European Variscan chain has only been the subject of very few recent studies (Link et al, 2019;Cugerone et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The perigranitic W-Au Salau deposit (Pyrenees, France): polyphase genesis of a late Variscan intrusion related deposit

Poitrenaud

Marcoux

Augier

et al. 2021

BSGF - Earth Sci. Bull.

View full text Add to dashboard Cite

A field study combined with a laboratory study and 3D modeling have been performed in order to decipher the genesis of the Salau deposit W-Au mineralization (Pyrenees, France), one of the most important for tungsten in Europe. Results show the existence of two superimposed ore types, emplaced ca. 10 km depth and within decreasing temperature conditions: a calcic silicates skarn with rare scheelite and disseminated sulphides followed by a mineralized breccia with massive sulphides (pyrrhotite and chalcopyrite dominant), coarse-grained scheelite and gold, representing the main part of the ore mined in the past. This breccia is localized in ductile-brittle shear-zones which crosscut the granodiorite. U/Pb dating on zircon, apatite and scheelite, previously realized, confirmed this polyphase evolution. These two types of mineralization, linked to the emplacement of two successive intrusions as confirmed by sulphur isotopic analysis, granodioritic then leucogranitic, can be classified as belonging to the Intrusion-Related Gold Deposit type (IRGD). The emplacement of the high-grade gold and scheelite breccia was initiated by the progressive localization of the regional deformation in the Axial Zone of the Pyrenees during the Permian within E-W dextral-reverse faults.

show abstract

The Hämmerlein skarn-hosted polymetallic deposit and the Eibenstock granite associated greisen, western Erzgebirge, Germany: two phases of mineralization—two Sn sources

Cited by 22 publications

References 31 publications

The polyphase evolution of a late Variscan W/Au deposit (Salau, French Pyrenees): insights from REE and U/Pb LA-ICP-MS analyses

The polyphase evolution of a late Variscan W/Au deposit (Salau, French Pyrenees): insights from REE and U/Pb LA-ICP-MS analyses

Timing of magmatic-hydrothermal activity in the Variscan Orogenic Belt: LA-ICP-MS U–Pb geochronology of skarn-related garnet from the Schwarzenberg District, Erzgebirge

The perigranitic W-Au Salau deposit (Pyrenees, France): polyphase genesis of a late Variscan intrusion related deposit

Contact Info

Product

Resources

About