Table 1.

Magnetic parameters for ODP site 1208

Parameter	Interpretation
Ferrimagnetic minerals	Examples include magnetite and maghemite. Structure is an inverse spinel. Magnetization arises due to antiparallel coupling of the two unequal sublattices.
Antiferromagnetic	Examples include hematite and goethite. Structure is an inverse spinel. Magnetization arises due to slight departure from antiparallel coupling of the two equal sublattices.
Mass-normalized magnetic susceptibility (χ)	Rough estimate of the concentration of ferrimagnetic minerals in a sample. Particularly sensitive to grains smaller and larger than 0.03 μm and 10 μm, respectively. Antiferromagnetic, paramagnetic, and diamagnetic material only dominant when ferrimagnetic material is low.
Anhysteretic susceptibility (χARM)	Dominantly reflects the concentration of small (<10 μm) magnetite grains, being particularly sensitive to grains (<0.1 μm).
Saturation Isothermal Remanent Magnetization (SIRM)	Primarily reflects the concentration of all remanence-carrying magnetic minerals–both ferrimagnetic and antiferromagnetic.
Hard IRM (HIRM)	Quantitative measure of the concentration of high-coercivity minerals (e.g., hematite).
S-Ratio (S300)	Provides relative proportion of high-coercivity minerals (e.g., hematite) to low-coercivity minerals (e.g., magnetite).
L-Ratio	Supports the use of the HIRM and S-Ratio environmental magnetic parameters. Relatively stable values allow for original interpretations while large fluctuations indicate possible changes in coercivities and thus provenance and grain size.
χARM/SIRM	Varies inversely with grain sizes (i.e., larger values = smaller grains). Preferentially responds to grains 1–10 μm in size. Can be affected by super- or paramagnetic material.
HIRM flux	Dust proxy presented in this paper. Higher values reflect increased fluxes of hard-coercivity material and therefore greater input of terrestrial material.