Methods Detail


Most of our speleothem samples are microsampled using NewWave Research micromilling devices equipped with 0.3 mm stainless steel drill bits (Brasseler), i.e. we mill increments along the extension axis of a stalagmite. The advantages over drilling are twofold, higher spatial resolution and continuous sampling. The sample powder is transferred into autosampler vials using a small scalpel.

A comparison of micromill, drilling and laser-ablation techniques is given in Spötl & Mattey (2006).