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The Reocín zinc-lead deposit, Spain: paleomagnetic dating of a late Tertiary ore body

Mineralium Deposita

By:
, , , , and
DOI: 10.1007/s00126-009-0253-3

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Abstract

The Reocín mine in northern Spain’s Basque–Cantabrian basin exploited a world-class Mississippi Valley-type Zn–Pb deposit. Its epigenetic mineralization is in Urgonian 116 ± 1 Ma dolomitized limestones of the Santillana syncline, which was formed by Oligocene and mid Miocene pulses of the Pyrenean orogeny. Paleomagnetic results (22 sites, 274 specimens) in mineralization isolated a stable remanence (ChRM) in pyrrhotite and minor magnetite inclusions in ore specimens, Zn concentrate, and tailings. A fold test shows that the ChRM is substantially post-folding. The mineralization’s paleopole lies on the European apparent polar wander path and indicates that the mineralization was formed at 15 ± 10 Ma. We postulate that brines originated in underlying Triassic and Lower Cretaceous sedimentary rocks and were driven upward into the host rocks by the hydraulic gradient created by the nearby Asturian massif.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
The Reocín zinc-lead deposit, Spain: paleomagnetic dating of a late Tertiary ore body
Series title:
Mineralium Deposita
DOI:
10.1007/s00126-009-0253-3
Volume
44
Issue:
8
Year Published:
2009
Language:
English
Publisher:
Springer
Description:
14 p.
First page:
867
Last page:
880
Country:
Spain
Other Geospatial:
Basque-Cantabrian basin
Online Only (Y/N):
N
Additional Online Files(Y/N):
N