Pb?Zn?Erz in der Kiesonkolithbank (Grenze Wettersteinkalk/ Raibler Schichten) der Lagerst�tte Bleiberg-Kreuth

Shulz, O.

doi:10.1007/bf01081106

Cited by 1 publication

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“…The "special facies" ores are characterized by fluorite, anhydrite and quartz. At the top boundary to the Raibl Group, an oolite horizon is mineralized with pyrite, marcasite, melnikovite, and rarely sphalerite, galena and barite (Schulz, 1983).…”

Section: Apt Districts Within the Drauzug -Gurktal Nappe Systemmentioning

confidence: 99%

Carbonate-hosted “Alpine-type” Zn-Pb deposits in the Eastern and Southern Alps – trace element geochemistry and isotopic data of sulphides

Melcher,

Bertrandsson-Erlandsson,

Gartner

et al. 2023

Irish-Type Zn-Pb Deposits Around the World

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More than 500 occurrences of carbonate-hosted Pb-Zn ores are documented in the Eastern and Southern Alps. They are invariably hosted by shallow lagoonal and reef carbonates of Middle and more frequently Upper Triassic (Anisian and Carnian) age and are collectively termed “Alpine-type” deposits. The local palaeogeography and synsedimentary structures influenced ore mineralization. Although they occur in a wide region, they share common features such as a simple mineralogical composition, complex ore textures, light sulphur isotopic compositions, Late Palaeozoic Pb model ages, and similar trace element compositions in sphalerite, galena and pyrite. Sphalerite records a low-temperature (60-140°C) precipitation. It is low in Fe, Mn, Co, Ag and In, but commonly contains elevated Cd, Ge, As, Tl and Pb. Galena is Ag-poor, although both sphalerite and galena tend to higher Ag concentrations towards the northern Districts. Minor Fe sulphides are low in Co and Ni but carry considerable As and Tl. Rb-Sr dating of sphalerite from the type locality Bleiberg reveals an age of ≈229 Ma for ores of the Raibl Group, and ages of ≈207 and ≈201 Ma for trace element-rich breccia ore in the western part of the Bleiberg deposit. The older age corresponds to U-Pb ages obtained on calcite associated with the Pb-Zn mineralization at the Gorno deposit (Southalpine). The younger age suggests fluid flow within the carbonate sequence in an extensional tectonic regime due to fracturing of the carbonate platform during initial rifting of the Penninic Ocean.

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Section: Apt Districts Within the Drauzug -Gurktal Nappe Systemmentioning

confidence: 99%