{"id":2412,"date":"2019-10-02T19:52:06","date_gmt":"2019-10-02T19:52:06","guid":{"rendered":"https:\/\/www.gsnv.org\/shop\/the-schellgaden-mining-district-central-austria-a-strata-bound-au-w-deposit-in-the-central-alps\/"},"modified":"2020-02-24T18:17:29","modified_gmt":"2020-02-24T18:17:29","slug":"the-schellgaden-mining-district-central-austria-a-strata-bound-au-w-deposit-in-the-central-alps","status":"publish","type":"product","link":"https:\/\/www.gsnv.org\/shop\/the-schellgaden-mining-district-central-austria-a-strata-bound-au-w-deposit-in-the-central-alps\/","title":{"rendered":"The Schellgaden mining district, central Austria: A strata-bound Au-W deposit in the central Alps"},"content":{"rendered":"","protected":false},"excerpt":{"rendered":"

The Schellgaden gold mining district is located in central Austria, south of
\nSalzburg, partly both in Salzburg and Carinthia provinces. It is an example of the
\nscheelite-type of strata-bound deposits classified by H\u00f6ll and Maucher (1976), as one
\nof several syngenetic, metalliferous systems in the Eastern Alps that formed in the
\nearly Paleozoic. It was mined principally for gold as early as the fourteenth century
\nand intermittently after that into the early nineteen hundreds. The district covers an
\narea of approximately 30 km north-south and 4 km east-west. Many ancient and
\nrecently active gold mines occur throughout the district, but the two most recently
\nactive and largest mines are located in the northernmost part.
\nThe host rocks at Schellgaden are part of the early Paleozoic Penninic basement
\nrocks exposed in the Tauern Window. The structural setting is much simpler than that
\nof the overriding Permo-Mesozoic nappes, although there is considerable faulting.
\nThe host rocks are a thousand meter thick sequence of metamorphosed volcanic and
\nvolcanoclastic rocks that are now greenschist, black carbonaceous schist, calcareous
\nschist, mica schist, gneiss and amphibolite. Gabbro and serpentinite are also present.
\nThe host rocks contain two types of ore deposits. The most common type is stratabound,
\nsheet-like to lensoid layers of fine to medium grained, granular quartz up to
\nthree meters in thickness. These occur as multiple layers in schistose sequences that
\nform continuous horizons, formerly termed \u201cLagers\u201d that are parallel to bedding of
\nthe host rocks. These horizons are 10 to 25 meters thick and continuous along strike
\nand dip. A less common type of ore is present in the form of discordant quartz veins
\nthat are similar in their mineralogy to the strata-bound quartz layers.
\nThe Schellgaden-type quartz ores contain gold, pyrite, galena, and chalcopyrite
\nor bornite in bands or layers. Scheelite is present in some ore layers\/horizons, but not
\nin others. Tourmaline may also be present in the quartz, but does not co-exist with
\nscheelite. Gold is free milling and associated with pyrite and galena. The ore contains
\nAu, Ag, Pb, Cu and in some ore horizons W. Zinc, As and Sb are low.<\/p>\n","protected":false},"featured_media":4758,"comment_status":"closed","ping_status":"closed","template":"","meta":{"pmpro_default_level":""},"product_cat":[154],"product_tag":[],"_links":{"self":[{"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/product\/2412"}],"collection":[{"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/comments?post=2412"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/media\/4758"}],"wp:attachment":[{"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/media?parent=2412"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/product_cat?post=2412"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.gsnv.org\/wp-json\/wp\/v2\/product_tag?post=2412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}