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Cassiterite U-Pb geochronology constrains magmatic-hydrothermal evolution in complex evolved granite systems; the classic Erzgebirge tin province (Saxony and Bohemia)

Zhang Rongqing, Bernd Lehmann, Reimar Seltmann, Sun Weidong and Li Congying
Cassiterite U-Pb geochronology constrains magmatic-hydrothermal evolution in complex evolved granite systems; the classic Erzgebirge tin province (Saxony and Bohemia)
Geology (Boulder) (December 2017) 45 (12): 1095-1098

Abstract

Laser ablation-inductively coupled plasma-quadrupole mass spectrometry analysis on hydrothermal cassiterite was applied to solve the long-standing debate on the age of the central European Erzgebirge-Krusne hory tin province of eastern Germany and the western Czech Republic. Cassiterite samples from the Sadisdorf, Ehrenfriedersdorf, Altenberg, Cinovec-Zinnwald, and Krupka tin deposits have U-Pb ages that overlap within the 2sigma uncertainty range, and define a relatively narrow time window of 326 + or - 3 to 320 + or - 3 Ma. These dates also define the minimum age of the associated highly evolved alkali feldspar granite intrusions, which so far could not be reliably dated by conventional U-Pb, Sm-Nd, Rb-Sr, or (super 40) Ar- (super 39) Ar techniques due to high-U metamict zircons and resetting by later thermal events. The time span of ca. 326-320 Ma characterizes the age range of regional rare-metal granite magmatism and associated hydrothermal tin mineralization in the Erzgebirge as a result of extensional collapse of the Variscan orogen.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 45
Serial Issue: 12
Title: Cassiterite U-Pb geochronology constrains magmatic-hydrothermal evolution in complex evolved granite systems; the classic Erzgebirge tin province (Saxony and Bohemia)
Affiliation: Chinese Academy of Sciences, Guangzhou Institute of Geochemistry, Wushan, China
Pages: 1095-1098
Published: 201712
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 31
Accession Number: 2018-024445
Categories: Economic geology, geology of ore depositsGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 201764
Illustration Description: illus. incl. 1 table, geol. sketch map
N50°10'00" - N51°00'00", E12°00'00" - E14°10'00"
Secondary Affiliation: Technical University of Clausthal, DEU, GermanyNatural History Museum, GBR, United KingdomChinese Academy of Sciences, Institute of Oceanology, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute.
Update Code: 201806
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