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Sample Types

The following table provides guidelines for typical sample volumes taken from ODP/IODP cores.

Sample Typical volume
Thin-section billets 10 cm3 up to 50 cm3 for large-grained plutonic rocks
Alkenone (Uk37) 5 cm3
X-ray diffraction 5 cm3
X-ray fluorescence 20 cm3 (sediments), 20-50 cm3 (igneous/sulfides—varies depending on grain size and homogeneity of rock)
Carbonate 2 cm3
Paleomagnetism 7-cm3 cubes, 12-cm3 minicores, 600-cm3 U-channels
Moisture and density 10–20 cm3
Grain size 10–20 cm3, depending upon coarseness
Planktonic foraminifers 10 cm3
Benthic foraminifers 10–20 cm3
Nannofossils 2 cm3
Diatoms 5–10 cm3
Radiolarians 10 cm3
Palynology 10–15 cm3
Organic samples 20 cm3
Interstitial porewaters whole rounds 5–20 cm long, based on water content
Inorganic geochemistry 10 cm3
Organic geochemistry 10 cm3
Sedimentology 10–20 cm3
Slabs (for laminae studies) 25-50 cm3, depending on slab length
Slabs (large-grained plutonic rocks) 50–100 cm3, often shared by scientists for multiple analyses
Stable isotopes (C, O) 10–20 cm3