2010 /18/1

ISSN: 1211-0329 (print), 1804-6495 (online)
Vedoucí redaktor: Mgr. Jiří Sejkora, PhD.

Nordstrandit z lomu v Děpoltovicích u Karlových Varů (Česká republika)

The rich occurrence of well-crystalline rare Al-hydroxide, nordstrandite, was found in the Děpoltovice quarry near Karlovy Vary, western Bohemia (Czech Republic). It forms there several morphological types and in the studied association, gibbsite was not found. This is atypical in comparison with…

Alkalické subvulkanity Českého středohoří ve srovnání se subvulkanity pohoří Kaiserstuhl (Německo) a Monteregian Hills (Kanada): petrologicko-geochemická studie

The Roztoky Intrusive Centre (RIC) represents a complicated multiple intrusive structure combining large elliptical crater vent (3 km by 1.5 km) filled by products of superficial trachytic and minor basaltic volcanism with trachytic and phonolitic intrusions, accompanied by hypabyssal intrusions of…

Negranitické pegmatity - přehled výzkumů

Currently, we regard pegmatites as rocks displaying more or less different mineral composition, provided that these display pegmatite-like textures (grain size, zonation, skeleton crystals development, graphic intergrowths, etc.). Like common granitic pegmatites, they also originated by…

Supergenní As mineralizace odvalu Stará Plimle na Kaňku u Kutné Hory (Česká republika)

In the area of the dumps of the Staročeské pásmo zone (mine dump Stará Plimle) at Kaňk near Kutná Hora (Czech Republic) a new occurence of arsenic supergene mineralization has been found. The association of supergene minerals is similar to original findings from the Kuntery and Šafary medieval…

Beryl a fenakit z granitových pegmatitov tunela Sitina v Bratislave

Granitic pegmatite vein (ca. 15 cm thick) containing Be-minerals occurs in granite from the Sitina tunnel in Bratislava, SW Slovakia. Dark grey quartz, white to dark grey microcline, milky-white albite (partially variety cleavelandite) and muscovite are main minerals of the pegmatite. Accessory…

Huntit z kamenolomu Bernartice u Dolních Kralovic

A serpentinite quarry at Bernartice near Dolní Kralovice is further locality where relatively rare Mg-carbonate huntite was identified. The mineral was found in a vein striking 35 - 45o and dipping 70o to the west that is 10 - 25 cm thick and penetrates the altered serpentinite. The vein is filled…