Age of the rhyolite hosting the Ultevis Mn-Fe-Ba-As mineralisation, northern Sweden

• A feldspar-porphyric Svecofennian rhyolite associated with Mn-mineralisations at Ultevis, west of Jokkmokk, northern Sweden, has been dated to 1872 ± 9 Ma. This figure also gives a maximum age of deposition of the stratigraphically overlaying sedimentary rock sequence (the Snavva–Sjöfall group). The position of Mn-Fe-Ba-As-F-U-(W-Mo) mineralisations is discussed in relation to the transition from volcanic to sedimentary environments in the Tjåmotis–Ultevis area.

Ämnesord

NATURVETENSKAP  -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)

NATURAL SCIENCES  -- Earth and Related Environmental Sciences -- Geology (hsv//eng)

Nyckelord

U-Pb zircon geochronology

volcanic rock

Ultevis

Mn-mineralisation

Svecofennian

Svecokarelian orogen

Fennoscandian shield

The changing Earth

Den föränderliga jorden

Publikations- och innehållstyp

vet (ämneskategori)

rap (ämneskategori)