Ilmenite
specimen number:
1052772
location:
Froland, Agder, Norway
description: The Froland mining area, situated in Aust-Agder county within southern Norway, is historically recognized for its complex crystalline rocks and localized industrial mineral extraction, particularly ilmenite and iron ores. Geologically, the region lies within the Sveconorwegian orogenic belt of the Baltic Shield, characterized by highly metamorphosed Proterozoic-age amphibolites, gneisses, and pegmatites. Hydrothermal and metamorphic processes concentrated heavy titanium-iron oxides within these dark, iron-rich amphibolitic rocks, forming localized lens-shaped bodies of massive ilmenite intimately intergrown with magnetite, hematite, and granular quartz. Historically, small-scale surface quarrying and shallow underground mine extraction began in the mid-eighteenth century, around 1750, primarily to supply iron-bearing raw materials to the nearby Baaseland and Frolands Verk ironworks. While ilmenite was initially discarded or treated as an undesirable impurity because titanium made the iron ore difficult to smelt in early blast furnaces, twentieth-century industrial advancements transformed titanium dioxide into a highly valued white pigment and aerospace metal. Consequently, intermittent corporate exploration and open-cut extraction targeted these titanium-rich deposits through both World Wars to supply strategic industrial metals. However, due to the discovery of much larger, highly economic mass-ilmenite deposits elsewhere in southern Norway, such as the massive Tellnes norite intrusion in Sokndal, organized commercial mining operations in the Froland sector steadily declined and reached permanent cessation by the mid-1950s.
Lustrous black crystals of ilmenite measuring to 7.0 cm in size embedded within matrix. It is possible that these are pseudomorphs of either rutile ore hematite after ilmenite. This is in good condition. The specimen comes with an antique label as shown at the end of the video with an original acquisition date in 1906.
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