Framboidal pyrite in fumaroles on Deception Island (Antarctica): Genetic implications

Pyrite framboids have been recognized in fumaroles on Deception Island, Antarctica. The sulphide was deposited around reworked pyroclastic tephra (lapilli). The formation process starts as a reaction between glass and hydrogen sulphide, giving rise to nucleation and growth of iron monosulfide microc...

Full description

Bibliographic Details
Main Authors: Agusto, M.R., Caselli, A.T., dos Santos Afonso, M.
Format: Journal/Newspaper
Language:unknown
Subjects:
Antarctica
Deception Island
Framboids
Fumarole
Pyrite
crystallization
greigite
massive sulfide
Arctic and Antarctic
South Shetland Islands
World
Antarc*
Antarctic
Arctic
Online Access:https://hdl.handle.net/20.500.12110/paper_00044822_v59_n1_p152_Agusto
Description
Summary:Pyrite framboids have been recognized in fumaroles on Deception Island, Antarctica. The sulphide was deposited around reworked pyroclastic tephra (lapilli). The formation process starts as a reaction between glass and hydrogen sulphide, giving rise to nucleation and growth of iron monosulfide microcrystals. The microcrystals then convert to greigite, and form aggregates of uniformly sized microcrystals (development of framboids). Finally, greigite is replaced by pyrite. In this study pyrite was observed forming at 100°C in less than one hour. © 2004 Asociación Geológica Argentina.

Similar Items