阿根廷米纳毕戈塔斯地区1∶250 000地球化学数据集

Mina Pirquitas, situated in the Andes Mountain of northwest Argentina, and within the Cenozoic Cu (Au) and polymetal metallogenic belt, is a part of Andes metallogenic belt. The region is diverse in lithology, well developed in volcanic and intrusive rocks, complex in geological structure, advantageous in metallogenic geological conditions, and thus the most prominent distribution region of metallic mineral resources such as Au and Cu in Argentina. From 2010 to 2014, China Geological Survey (CGS) and Argentina Geological Survey (AGS) cooperated on 1:250 000 geochemistry research demonstration during which 2 470 fluvial sediment and soil samples were collected in Mina Pirquitas at a sample grain-size ranging between -10 meshes and +60 meshes and at a mean sampling density of 1.01 samples/4 km2. 39 elements and oxides were analyzed with X-ray fluorescence spectroscopy, plasma-mass spectrometry, atomic fluorescence spectrometry, atomic emission spectrometry, graphite furnace atomic absorption spectrometry and ion selective electrode method, and single-element geochemical maps and comprehensive anomaly maps were plotted. A total of 487 locations with single-element geochemistry anomaly and 52 locations with comprehensive anomaly were discovered and prospective mineral areas worthy of further investigation were delineated. These data and maps are important for reference to mineral exploration, fundamental geological research, and environmental engineering in the region.

米纳·皮尔基塔斯（Mina Pirquitas）坐落于阿根廷西北部安第斯山脉，隶属于新生代铜（金）及多金属成矿带，是安第斯成矿带的组成部分。该区岩性多样，火山岩与侵入岩广泛发育，地质构造复杂，成矿地质条件优越，是阿根廷金、铜等金属矿产资源分布最突出的区域。2010至2014年间，中国地质调查局（China Geological Survey, CGS）与阿根廷地质调查局（Argentina Geological Survey, AGS）合作开展1:25万地球化学研究示范项目，在米纳·皮尔基塔斯区域采集了2470件河流沉积物与土壤样品，样品粒级介于-10目至+60目之间，平均采样密度为1.01件/4平方千米。研究团队采用X射线荧光光谱法（X-ray fluorescence spectroscopy）、等离子体质谱法（plasma-mass spectrometry）、原子荧光光谱法（atomic fluorescence spectrometry）、原子发射光谱法（atomic emission spectrometry）、石墨炉原子吸收光谱法（graphite furnace atomic absorption spectrometry）及离子选择电极法（ion selective electrode method），对39种元素及氧化物开展分析，并绘制了单元素地球化学图与综合异常图。本次工作共发现487处单元素地球化学异常点位与52处综合异常点位，圈定了具备进一步勘查价值的找矿远景区。上述数据与图件可为该区域的矿产勘查、基础地质研究及环境工程工作提供重要参考。