Sulphide mounds

Inactive chimneys, hydrothermal and sulphide sediments and mounds The interior of sulphide mounds has been likened to an exposed mesoscale view of the subsurface environment, and hence is of great interest to microbiologists (Deming Baross, 1993). This environment may also provide a continuum of bacterial populations between high and low temperature hydrothermal... 

Aluminium Sulphide. Weigh 1 g of aluminium powder and the calculated amount of finely triturated sulphur, and thoroughly mix the reactants. Spill out the mixture in a mound onto a metal plate and put a magnesium ribbon in the middle so that its upper end protrudes 1-2 cm above the mixture. Ignite the magnesium in a fume cupboard with a lowered glass window ). How can you explain the hydrogen sulphide odour of the aluminium sulphide ... 

Scott, 1997). Where these deposits are relatively large, such as at the TAG mound on the Mid-Atlantic Ridge, they resemble ancient volcanic-hosted massive sulphide (VMS) deposits like those presently found in ophiolites (Rona Scott, 1993 Humphris etal., 1995 Mills, 1995 Goulding etal., 1998 Scott, 1997). Some of the metals at hydrothermal vents are discharged as black smoke along with gases and other dissolved ions, and are expelled into plumes above and away from the vents (see Section 2.4). 

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