Polymetallic mineralization in Ediacaran sediments in the Żarki-Kotowice area, Poland

Marek Markowiak,Łukasz Karwowski

doi:10.2478/v10002-012-0008-0

Marek Markowiak, Łukasz Karwowski

Open Access

https://doi.org/10.2478/v10002-012-0008-0

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Abstract

AbstractIn one small mineral vein in core from borehole 144-Ż in the Żarki-Kotowice area, almost all of the ore minerals known from related deposits in the vicinity occur. Some of the minerals in the vein described in this paper, namely, nickeline, hessite, native silver and minerals of the cobaltite-gersdorffite group, have not previously been reported from elsewhere in the Kraków-Lubliniec tectonic zone. The identified minerals are chalcopyrite, pyrite, marcasite, sphalerite, Co-rich pyrite, tennantite, tetrahedrite, bornite, galena, magnetite, hematite, cassiterite, pyrrhotite, wolframite (ferberite), scheelite, molybdenite, nickeline, minerals of the cobaltitegersdorffite group, carrollite, hessite and native silver. Moreover, native bismuth, bismuthinite, a Cu- and Ag-rich sulfosalt of Bi (cuprobismutite) and Ni-rich pyrite also occur in the vein. We suggest that, the ore mineralization from the borehole probably reflects post-magmatic hydrothermal activity related to an unseen granitic intrusion located under the Mesozoic sediments in the Żarki-Pilica area.

Highlights

All bore-holes in the Żarki-Kotowice area were drilled during the last two decades of the last century (Fig. 1)
The ore mineralization from the borehole probably reflects post-magmatic hydrothermal activity related to an unseen granitic intrusion located under the Mesozoic sediments in the Żarki-Pilica area
All analyses were calculated according to the sum of (Te+S)Σ=1

Summary

Introduction

All bore-holes in the Żarki-Kotowice area were drilled during the last two decades of the last century (Fig. 1). The faulted rocks are Precambrian sedimentary complexes This tectonic zone, most active from Cambrian- to Permian times (Buła 2000; Buła et al 1997; Żaba 1999), separates the Małopolska Block from the Upper Silesian Block. The secondary alternations seen in the Żarki Area, and the mineral association of the part enriched in ore minerals, are almost the same as in nearby mineralised areas, e.g. Pilica (Harańczyk 1983), Myszków-Mrzygłód (Ślósarz 1994) and in the Zawiercie Area (Górecka 1978; Harańczyk 1983) These various occurrences of mineralisation may have a genesis connected with the Variscan cycle that is common to all These various occurrences of mineralisation may have a genesis connected with the Variscan cycle that is common to all (e.g. Oszczepalski et al 2010)

Analytical techniques

Results

Discussion