The spodumene pegmatite of Syväjärvi was explored in the 1960s by Suomen Mineraali Oy. At the time, the area was known as Ruohojärvi.

In the 1980s, the exploration was continued by Paraisten Kalkki Oy. In 2006–2010, the Geological Survey of Finland continued the previous studies with the help of boulder prospecting, geophysics and diamond drilling.

Keliber has been studying the Syväjärvi deposit since 2013. The company has implemented a number of drilling programmes in Syväjärvi as well as a bulk sampling project as a tunnel sampling in the summer of 2016.

The spodumene pegmatite of Syväjärvi consists of a main vein, which is divided into two separate pegmatite veins in places, as well as a few narrow parallel veins. The maximum thickness of the main vein is about 30 metres.

The primary rock types in the Syväjärvi area are mica schist and metagreywacke. The site also contains volcanic rocks such as metatuff, meta-lapilli tuff, meta-agglomerate and plagioclase porphyrite.

Mineral resources – Syväjärvi
Category Deposit kt Li₂O % Cutoff JORC
Inferred Syväjärvi 118 0,79 0,50 2012
Sub-Total 2 827 1.20
Measured Syväjärvi 1 542 1.33 0.50 2012
Indicated Syväjärvi 1 167 1.07 0.50 2012
Ore Reserves – Syväjärvi (open pit)
Category Deposit kt Li₂O % JORC
Proven Syväjärvi 1 433 1.18 2012
Probable Syväjärvi 491 0.97 2012
Total 1 924 1.13

The ore reserve estimates have been prepared according to the guidelines of the JORC Code 2012 by Pöyry Finland Oy by competent persons under the supervision of Ville-Matti Seppä MSc (Geology), EurGeol acting as the qualified person. Syväjärvi mineral resources have been estimated and reported by Payne Geological Services Pty Ltd. Estimates have been prepared and reported in accordance with the guidelines of the Australasian Code for the Reporting of Mineral Resources and Ore Reserves (JORC Code 2012).