Chemical Composition: ICP-MS/AAA data from sample, Copper-Iron Alloy:
1977.216.3183.1: Cu, 56.81; Sn, less than 0.25; Pb, 0.46; Zn, 0.24; Fe, 41.48; Ni, 0.03; Ag, 0.04; Sb, 0.18; As, 0.7; Bi, less than 0.025; Co, 0.06; Au, less than 0.01; Cd, 0.001
ICP-MS/AAA data from sample, Copper-Antimony-Arsenic Alloy:
1977.216.3183.2: Cu, 86.5; Sn, less than 0.25; Pb, 0.26; Zn, 0.003; Fe, less than 0.01; Ni, 1.54; Ag, 0.31; Sb, 6.96; As, 4.44; Bi, less than 0.025; Co, less than 0.01; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Copper:
1977.216.3183.3: Cu, 99.27; Sn, less than 0.25; Pb, 0.08; Zn, 0.123; Fe, 0.15; Ni, 0.02; Ag, 0.01; Sb, less than 0.05; As, 0.22; Bi, less than 0.025; Co, 0.123; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Copper:
1977.216.3183.4: Cu, 96.43; Sn, less than 0.25; Pb, 0.09; Zn, 0.684; Fe, 1.55; Ni, 0.03; Ag, 0.06; Sb, less than 0.05; As, 0.24; Bi, less than 0.025; Co, 0.926; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Leaded Copper-Antimony-Arsenic Alloy:
1977.216.3183.5: Cu, 67.21; Sn, less than 0.25; Pb, 22.45; Zn, 0.005; Fe, 0.22; Ni, 2.11; Ag, 0.24; Sb, 3.02; As, 4.35; Bi, less than 0.025; Co, 0.402; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Leaded Bronze:
1977.216.3183.6: Cu, 79.48; Sn, 11.28; Pb, 8.65; Zn, 0.007; Fe, less than 0.01; Ni, 0.06; Ag, 0.09; Sb, 0.12; As, 0.23; Bi, 0.07; Co, 0.016; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Copper:
1977.216.3183.7: Cu, 99.39; Sn, less than 0.25; Pb, 0.11; Zn, 0.023; Fe, less than 0.01; Ni, 0.03; Ag, 0.12; Sb, less than 0.05; As, 0.19; Bi, 0.14; Co, less than 0.01; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Leaded Copper:
1977.216.3183.8: Cu, 62.25; Sn, less than 0.25; Pb, 36.68; Zn, 0.284; Fe, 0.36; Ni, 0.02; Ag, 0.08; Sb, less than 0.05; As, 0.16; Bi, 0.12; Co, 0.046; Au, less than 0.01; Cd, less than 0.001
ICP-MS/AAA data from sample, Leaded Copper:
1977.216.3183.9: Cu, 74.53; Sn, 1.01; Pb, 23.48; Zn, 0.202; Fe, 0.24; Ni, 0.04; Ag, 0.06; Sb, 0.1; As, 0.25; Bi, 0.05; Co, 0.034; Au, less than 0.01; Cd, less than 0.001
J. Riederer
Technical Observations: The patinas vary for each piece. 1977.216.3183.1 is green with areas of black and large areas of iron rust. 1977.216.3183.2 is black and dark green with small spots of iron rust. 1977.216.3183.3 is dark green with iron rust accretions; mud is also present. 1977.216.3183.4 is light green with thick areas of iron rust. 1977.216.3183.5 has a layer of green over black with a small spot of iron rust. 1977.216.3183.6 is green with small spots of iron rust. 1977.216.3183.7 is dark green and black. 1977.216.3183.8 has a layer of green over dark green. 1977.216.3183.9 is light green.
1977.216.3183.1 is much larger than the other pieces and is a cast ingot or fragment of an ingot. The two large faces are relatively flat, and there is a 4-mm step down to the single straight edged side of the ingot. The faces and this straight edge appear to have been cast against a form. The two long edges are irregular and appear fractured. The soft surfaces of these fractured edges could indicate that the breaks occurred at an early stage when the metal was still partially molten. The small edge is more molten in texture and does not show evidence of fracture.
1977.216.3183.6 and 1977.216.3183.9 each have one flat side and an opposite side that is parallel to the flat side but rougher and less flat. These pieces appear to have been produced by pouring molten metal against a flat surface and then breaking the resulting slab into small pieces. All of the edges are rough fractures pre-dating burial. 1977.216.3183.5 also has one flat side and an opposite side that is parallel to the flat side but rougher and less flat. One of the four edges is straight, with a rounded contour on one face and a sharper right-angle edge on the other face. The precise shape of this edge indicates the slab was poured on a flat surface that had a shaped wall at the edges to control the flow of metal. The other three edges are fractured, as in 1977.216.3183.6 and 1977.216.3183.9.
1977.216.3183.2, 1977.216.3183.3, 1977.216.3183.4, and 1977.216.3183.7 have more irregular surfaces. 1977.216.3183.2 has two flat sides, but they are not parallel. These pieces appear to have been poured into dirt, sand, or some other irregularly shaped material. The non-flat sides of 1977.216.3183.2 appear fractured, as in 1977.216.3183.1, 1977.216.3183.5, 1977.216.3183.6, and 1977.216.3183.9. 1977.216.3183.3, 1977.216.3183.4, and 1977.216.3183.7 appear to be complete casts, that is, they do not appear to be sections broken away from a larger slab.
1977.216.3183.8 appears to have molded shapes that could be heads or other parts of figures on both flat surfaces. Three of the edges are fractured. The fourth edge is a regular curve. If the curve continued, the radius of the resulting circle would be about 15 to 25 cm. The extremity of this edge has a fine projection that could be a mold line formed by the juncture of two mold sections.
Henry Lie (submitted 2002)
