TY  - CHAP
ID  - epos2010
UR  - http://doi.org/10.1016/B978-0-12-410438-9.00020-0
A1  - Mäki, Timo
A1  - Imaña, Marcello
A1  - Kousa, Jukka
A1  - Luukas, Jouni
Y1  - 2015///
N2  - The Vihanti-Pyhäsalmi belt contains the most important volcanogenic massive sulfide (VMS) deposits in
Finland. The volcano-sedimentary host rocks belong to a 1.93?1.92 Ga island arc that occurs along the
northwestern parts of the Raahe-Ladoga shear complex. The stratigraphy in the region is divided into two
units, a lower bimodal volcanic unit conforming to the Pyhäsalmi group and an upper volcano-sedimentary
association defined as the Vihanti group. The U-Pb zircon ages of the two groups are similar.
The Vihanti-Pyhäsalmi belt hosts two large VMS deposits, Pyhäsalmi in the Pyhäsalmi group and Vihanti in
the Vihanti group, as well as a number of small sulfide deposits located around them. The Pyhäsalmi
deposit is hosted by rhyolitic and basaltic volcanic rocks, contains 75.7 Mt of pyritic mineralization grading
0.9% Cu, 1.9% Zn, 0.4 g/t Au, and 14.1 g/t Ag, and hosts the only currently producing mine (2014) in the
belt. The Vihanti mine operated from 1954?1992, producing 28 Mt at 5.12% Zn, 0.48% Cu, 0.36% Pb, 25
ppm Ag, and 0.49 ppm Au. The Vihanti deposit and three minor satellite mineralizations are hosted in a
sequence dominated by intermediate and felsic metavolcanic rocks.
PB  - Elsevier
SN  - 978-0-12-410438-9
ED  - Maier, Wolfgang Derek
ED  - Lahtinen, Raimo
ED  - O'Brian, Hugh
M1  - 7
TI  - The Vihanti-Pyhäsalmi VMS Belt
SP  - 507
AV  - none
EP  - 530
T2  - Mineral Deposits of Finland
ER  -