O2 Muu julkaisu

U-Pb zircon, monazite and xenotime geochronology of cordierite-anthophyllite and felsic volcanic rocks in Orijärvi, southern Finland




TekijätTeemu Vehkamäki, Markku Väisänen, Yann Lahaye, Matti Kurhila, Bo Johanson

ToimittajaIlmo Kukkonen, Suvi Heinonen, Hanna Silvennoinen, Fredrik Karell, Elena Kozlovskaya, Arto Luttinen, Kaisa
Nikkilä, Vesa Nykänen, Markku Poutanen, Pietari Skyttä, Eija Tanskanen, Timo Tiira, Kati Oinonen

Konferenssin vakiintunut nimiSYMPOSIUM ON STRUCTURE, COMPOSITION AND EVOLUTION OF THE LITHOSPHERE

KustantajaInstitute of Seismology, University of Helsinki

KustannuspaikkaHelsinki

Julkaisuvuosi2018

Kokoomateoksen nimiLITHOSPHERE 2018

Sarjan nimiReport S

Numero sarjassa67

Aloitussivu117

Lopetussivu120

ISBN978-952-10-9594-8

eISBN978-952-10-9595-5

Verkko-osoitehttp://www.seismo.helsinki.fi/ilp/lito2018/Lito2018_Abstract_Volume_color.pdf

Rinnakkaistallenteen osoitehttps://research.utu.fi/converis/portal/detail/Publication/36385498


Tiivistelmä

We sampled one felsic volcanic rock from the lower part of the Kisko formation and two cordierite-anthophyllite rocks from Orijärvi and Iilijärvi for U-Pb dating. The felsic volcanic rock yield a zircon 207Pb/206Pb weighted average age of ~1.89 Ga. The oldest zircons from the Orijärvi cordierite-anthophyllite rock give a weighted average age of ~1.89 Ga. The monazite from the same sample yield a concordia age of ~1.80 Ga and the xenotime yield a concordia age of ~1.82 Ga. The Iilijärvi cordierite-anthophyllite rock gives a monazite concordia age of ~1.82 Ga. This implies that two metamorphic pulses are recorded in the samples.


Ladattava julkaisu

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Last updated on 2024-26-11 at 20:35