PORTASPEC shipboard determined chemical composition of ferromanganese crusts for L9-84-CP expedition (R/V S.P. Lee)

Mobile laboratories are important to the exploration geochemist because they offer rapid chemical analyses of geologic materials in the field. This permits modification of the sampling plan in response to significant findings, rather than following a planned sampling scheme and leaving any follow-up to a later time. The portable PORTASPEC X-ray spectrograph (Pitchford Scientific instruments Division of Hankison Corporation) Model 2501 was used on ferromanganese crusts during the L9-84-CP (R/V S.P. Lee) expedition by the United States Geological Survey. The composition in major elements was averaged over a collection of samples for each station.

移动实验室对勘探地球化学家而言至关重要，因其可在野外现场对地质物质开展快速化学分析。此举使得研究人员可依据重大发现实时调整采样方案，而非拘泥于预设的采样计划，将后续工作留待日后开展。美国地质调查局在L9-84-CP（S.P.李号（R/V S.P. Lee））科考航次中，使用汉基森公司皮奇福德科学仪器分部生产的PORTASPEC 2501型便携式X射线光谱仪（PORTASPEC X-ray spectrograph）对铁锰结壳开展分析。针对每个采样站位的全部样品，对其主量元素组成求取平均值。