Reconstructing formation processes at the Canary Islands indigenous site of Belmaco Cave (La Palma, Spain) through a multiproxy geoarchaeological approach

作者：Enrique Fernández‐Palacios, Margarita Jambrina‐Enríquez, Susan M. Mentzer, Caterina Rodríguez de Vera, Ada Dinçkal, Natàlia Égüez, Antonio V. Herrera‐Herrera, Juan Francisco Navarro Mederos, Efraín Marrero-Salas, Christopher E. Miller, Carolina Mallol · 发表于：Geoarchaeology · 年份：2023 · DOI：10.1002/gea.21972 · 被引用次数：20 · 研究领域：Geology and Paleoclimatology Research、Hydrocarbon exploration and reservoir analysis、Geological and Geochemical Analysis

Abstract The indigenous populations of La Palma (Canary Islands), who arrived on the island from Northwest Africa ca. 2000 years B.P., were predominantly pastoralists. Yet, many aspects of their subsistence economy such as the procurement, management, and use of wild plant resources remain largely unknown. To explore this, we studied the 600–1100‐year‐old archaeological site of Belmaco Cave, which comprises a stratified sedimentary deposit representative of a fumier . Here, we present a high‐resolution, multiproxy geoarchaeological study combining soil micromorphology, lipid biomarker analysis, X‐ray diffraction, μ‐X‐ray diffraction, μ‐X‐ray fluorescence, Fourier transform infrared spectroscopy, and μ‐Fourier transform infrared spectroscopy, to characterize formation processes and explore plant sources. Recurrent goat/sheep habitation and maintenance activities are represented by interstratified layers of unburned dung, charcoal‐rich sediment, and dung ash. Lipid biomarker data show a herd diet mainly composed of herbaceous plants, which is key to understanding the mobility of indigenous shepherds. Our results also revealed an unusual suite of authigenic minerals including hazenite, aragonite, and sylvite, possibly formed through diagenetic processes involving interaction between ash, dung, urine, volcanogenic components, and bacterial activity, coupled with arid and alkaline conditions. Our study shows the potential of a multiproxy approach to a fumier deposit in a volcanoge...