stripes
Occurrence number:
130-00-008
Country:
Paraguay
Region:
Amambay
Location:
Longitude: -56.03, Latitude: -23.08
Carbonatite:
No
An intrusion of essexite containing syenite veins and emplaced in Jurassic sandstones (J.H. Palmieri, personal communication, 1981), but described on a map of Mariano and Druecker (personal communication, 1985) as 'fenitized shonkinite' and with a radial swarm of lamprophyre dykes.
Age:
K-Ar on biotite from shonkinite gave 117±4 Ma (Mariano and Druecker, personal communication, 1985).
References:
MARIANO, A.N. and DRUECKER, M.D. 1985. Alkaline igneous rocks and carbonatites of Paraguay. Abstracts with Programs, Geological Society of America, 17: 166.
MARIANO, A.N., personal communication, 1985.
PALMIERI, J.H., personal communication, 1981
Location: