Slags: Descriptions (CJS)

Extract

The following slags are described separately: see also full catalogue in microfiche Table 2. See analyses of each of the following items (with the exo tptioi of nr 69), including occasional metallic inclusions, in microfiche Table 9, where details of sample number and conte... are also given.

55. Moderate-sized plano-convex,slag (type 4), with moderate porosity and few charcoal impressions (174 g). Microstructure: moderate-sized semi-dendritic iron-oxide FeO (40-60%) inhomogeneously distributed, in matrix of fayalite and fayalite plus iron oxide pseudo-eutectic. A little ternary glass+fayalite+iron oxide eutectic present. Some regions of pure fayalite; others with large laths of fayalite and iron oxides outlined by giass and iron oxide eutectic. A little metallic iron present.

56. Fragment of dense plano-convex slag (50.5 g). Patchily distributed iron oxide (FeO), locally massive (100%), and distorted. Dendrite arm size and spacing varies through fine-moderate-large arms. Matrix of fayalite and unresolved eutectic. A little metallic iron.

57. Piece of dense plano-convex slag (37 g). Moderate porosity. Metallic iron common in regions with less iron oxide. There are two regions: one with pools of massive semi-globular FeO with 90+% iron oxide (wustite), interspersed with regions with moderate or fine dendritic FeO in a matrix of unresolved material. Metallic iron contains several percent copper!