roxy music is rocking.., page-7

Meant to say Massive sulphide "rarely" gets over 2m in my original post. Check below anyway.

The ore bodies themselves typically have a distinctive ore profile, consisting of massive sulphides at the base (directly overlying the basal contact), followed by matrix sulphides and then by disseminated sulphides:

Massive sulphides
This zone can be 0.2 to 1.5 metres thick, and consists of essentially 100% sulphides. Most abundant are pyrrhotite (iron sulphide - approx 50%), pentlandite (nickel-iron sulphide - approx 35%), and minor amounts of pyrite (iron sulphide) and chalcopyrite (copper iron sulphide). The massive sulphide zone forms the lowermost unit, and lies directly on the underlying basalt unit. The grade of this unit is 10% to 14% nickel.

Matrix sulphides
This zone overlies the massive sulphide unit, and consists of a net-textured rock composed of intermixed sulphides and other non-sulphide minerals. This texture reflects the original interstitial distribution of sulphides and olivine grains in the original rock. Matrix sulphides range in grade from 3% to 8% nickel, and may be up to 1.5 metres thick.

Disseminated sulphides
This zone consists of a fine-grained (0.5 to 2mm) sprinkling of sulphides scattered throughout the ultramafic host rock. It usually grades from 0.5% to 2.0% nickel. It forms the uppermost unit of the ore zone, and may have a gradational upper boundary against the unmineralised overlying host rock.

There is enormous variability throughout the ore bodies. In many areas there may be only one or two of the components present, and this creates substantial local grade variability.

Bring on Pending Hole result MFEC063, coming out any day now. This could be a big bang firecracker moment..

Arlberg1