We developed a portable extruder for precise and accurate high-resolution subsampling of unconsolidated sediment cores. This extruder is capable of producing subsamples at a minimum 1-mm resolution and is designed for easy operation and maintenance in the field. Movement of the threaded extruder rod (½” 8 start acme thread) through the core barrel is driven by a crank wheel graduated in 1-mm increments. This extruder design is particularly useful for obtaining incremental subsamples for applications where high-resolution subsamples of identical size are required (e.g. time series analysis, climate variability, land use change, contamination), and for use in field settings where it is impractical to deploy a freeze corer.

我们开发了一种便携式挤出机，用于对松散沉积岩心进行精确和准确的高分辨率二次采样。该挤出机能够以最小 1 毫米的分辨率生产子样品，并且专为便于现场操作和维护而设计。带螺纹的挤出机杆（½” 8 起始顶点螺纹）通过芯筒的运动由以 1 毫米为增量刻度的曲柄轮驱动。这种挤出机设计对于在需要相同大小的高分辨率子样本（例如时间序列分析、气候变异、土地利用变化、污染）的应用中获取增量子样本特别有用，以及用于部署不切实际的现场设置冷冻取芯器。