We report comprehensive rock-magnetic and archaeointensity investigations from 21 well-constrained pottery fragments from the Catamarca province of northwest Argentina. The absolute ages of the studied sites are ascertained by several high-quality radiometric ages and range between 1940 to 114014C yr BP. Magnetic mineralogy experiments indicates that the remanence is carried by thermally stable Ti-poor titanomagnetites. Forty-seven samples belonging to 11 out of 98 studied potsherds yielded reliable absolute intensity determinations judging from the quality parameters associated with the Thellier double-heating experiments. Moreover, we analyzed the available absolute geomagnetic intensities associated with the radiometric ages to construct the first intensity paleosecular variation curve (PSVC) for South America using thermoremanent magnetization carried by burned archaeological artifacts obtained in the present investigation and 79 other selected archaeointensities (out of 213 published in the literature). The dataset is used to build the PSVC reference curve by combined bootstrap and temporal P-spline methods. The variation curve shows significant differences with the global prediction model SHA.DIF.14k mainly based on the GEOMAGIA database. This intensity PSVC curve shows reasonably good agreement with paleosecular variation curves for Europe between 850 through 1150 BC and for Asia between 1000 and 1500 BC. This regional curve may be used as most reliable archaeomagnetic dating tool for the major part of South America (Peru, Brazil, Argentina, Chile, and Bolivia) for the last two millennia.

我们报告了来自阿根廷西北部卡塔马卡省的21个受约束的陶器碎片的综合岩磁和古强度研究。研究地点的绝对年龄由几个高质量的辐射年龄确定，范围在1940年至1140年之间14Cyr BP。磁性矿物学实验表明，剩磁是由热稳定的贫钛钛磁铁矿携带的。从与Thellier双重加热实验相关的质量参数来看，在98个研究过的钾肥中，有11个来自47个样品，可以得出可靠的绝对强度测定结果。此外，我们分析了与辐射年龄相关的可用绝对地磁强度，以利用本研究中获得的已燃烧考古文物携带的热剩余磁化强度和其他79种选定的古地理强度（从213种中得出）来构建南美的第一条强度古显微镜变化曲线（PSVC）。在文献中发表）。该数据集通过自举和时间P样条曲线方法用于构建PSVC参考曲线。变异曲线与主要基于GEOMAGIA数据库的全局预测模型SHA.DIF.14k表现出显着差异。对于欧洲在公元前850年至1150年之间以及在亚洲公元前1000年至1500年之间，该强度PSVC曲线显示出与古生物变化曲线相当吻合。在过去的两千年里，该区域曲线可以用作南美大部分地区（秘鲁，巴西，阿根廷，智利和玻利维亚）最可靠的古地磁测年工具。