(Table 2) Composition of native Cu occurrences from two samples of DSDP Hole ...

Average concentrations for point measurements under the assumption that the Cu**0 particles are homogeneous in depth and themain additional elements in the surface films are O...在零价铜（Cu⁰）颗粒在深度方向上分布均匀，且表面薄膜的主要伴生元素为氧（O）……的假设前提下，点状测量所得的平均浓度。