Izalco Volcano, Sonsonate Department, El Salvador
|Latitude & Longitude (WGS84):||13° 48' North , 89° 36' West|
|Latitude & Longitude (decimal):||13.80000,-89.60000|
The volcano was almost continously active from its birth in 1770 until 1958. Since then only a brief, very small flank eruption in 1966 has interrupted dormancy. Pre-1966 Izalco lavas are vesicular vitrophyric olivine basalts, usually with bytownite phenocrysts and augite.
Many new minerals have been found in the fumaroles and fumarolic sublimates which are unusually rich in vanadine.
15 valid minerals. 8 (TL) - type locality of valid minerals.
This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.
Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org
Birnie, R.W., Hughes, J.M. (1980) Ziesite, β-Cu2(V2O7), a new copper vanadate and fumarole temperature indicator. American Mineralogist, 65, 1146-1149. http://www.minsocam.org/ammin/AM65/AM65_1146.pdf
Hughes, J.M., Finger, L.W. (1980) Bannermanite, a new sodium-potassium vanadate isostructural with β-NaxV6O15. American Mineralogist 68, 634-642. http://www.minsocam.org/ammin/AM68/AM68_634.pdf
Hughes, J.M., Finger, L.W. (1983) The crystal chemistry of shcherbinaite, naturally occurring V2O5. American Mineralogist, 68(11-12), 1220-1222. http://www.minsocam.org/ammin/AM68/AM68_1220.pdf
Hughes, J.M., Hadidiacos, C.G. (1985) Fingerite, Cu11O2(VO4)6, a new vanadium sublimate from Izalco crater, El Salvador: descriptive mineralogy. American Mineralogist, 70, 193-196. http://www.minsocam.org/ammin/AM70/AM70_193.pdf
Robinson, P.D., Hughes, J.M., Malinconico, M.L. (1987) Blossite, α-Cu2[V2O7], a new fumarolic sublimate from Izalco volcano, El Salvador. American Mineralogist, 72, 397-400. http://www.minsocam.org/ammin/AM72/AM72_397.pdf
Hughes, J.M., Starkey, S.J., Malinconico, M.L., Malinconico, L.L. (1987) Lyonsite, Cu32+Fe43+(VO4)63-, a new fumarolic sublimate from Izalco volcano, El Salvador: Descriptive mineralogy and crystal structure. American Mineralogist, 72, 1000-1005. http://www.minsocam.org/ammin/AM72/AM72_1000.pdf
Hughes, J.M., Christian, B.S., Finger, L.W., Malinconico, L.L. (1987) Mcbirneyite, Cu3(VO4)2, a new sublimate mineral from the fumaroles of Izalco Volcano, El Salvador. Journal of Volcanology and Geothermal Research, 33, 183–190.
Hughes, J.M., Drexler, J.W., Campana, C.F., Malinconico, M.L. (1988) Howardevansite, NaCuFe2(VO4)3, a new fumarolic sublimate from Izalco volcano, El Salvador: Descriptive mineralogy and crystal structure. American Mineralogist, 73, 181-186. http://www.minsocam.org/ammin/AM73/AM73_181.pdf