A detailed magnetic mineralogy and archaeomagnetic investigation was performed on thirty-two red mural painting samples belonging to the colonial Santo Domingo Convent in Oaxaca (Southern Mesoamerica). Systematic magnetic experiments included continuous thermomagnetic curves, hysteresis cycles, acquisition of isothermal remanence and step-wise alternating field demagnetization of the pictorial remanent magnetization (PiRM). Titanium-poor titanomagnetite seems to act as responsible for major part of pictorial remanent magnetization while heating and cooling curves show marked irreversibility and high thermal instability. Although all samples were demagnetized by means of alternating fields up to 90 mT, only seven of them provided reasonably well-grouped paleodirections yielding following mean values: Inclination = 35.2°, Declination = 2.3°, α₉₅ = 4.8° and k = 161. According to the probability density function obtained by means of the global geomagnetic model SHA.DIF.14 K, the possible elaboration date of the painting layer under study is estimated between 1684 CE and 1744 in accordance with historical documents. Despite low success rate, the described methodology deserves to be considered for dating of wide range of red mural paintings worldwide.

对属于瓦哈卡（南中美洲）殖民地圣多明各修道院的 32 幅红色壁画样本进行了详细的磁性矿物学和考古磁学调查。系统磁实验包括连续热磁曲线、磁滞循环、获取等温剩磁和图像剩磁 (PiRM) 的逐步交变场退磁。缺钛的钛磁铁矿似乎是图像剩余磁化的主要部分，而加热和冷却曲线显示出明显的不可逆性和高度的热不稳定性。尽管所有样品都通过高达 90 mT 的交变场退磁，但其中只有七个提供了合理分组的古方向，产生了以下平均值：倾角 = 35.2°，偏角 = 2.3°，α₉₅  = 4.8°，k = 161。 根据全球地磁模型 SHA.DIF.14 K 得到的概率密度函数，根据下式估计，所研究的绘画层的可能形成年代在公元 1684 年至 1744 年之间。历史文献。尽管成功率低，但所描述的方法值得考虑用于全球范围广泛的红色壁画的约会。