New Radiocarbon Analysis Refines Timeline for Llullaillaco Inca Sacrifices

A new radiocarbon analysis of botanical remains found alongside the “Children of Llullaillaco” mummies indicates the ritual sacrifices occurred between 1462 and 1507, with researchers identifying 1499 as the most likely date. Published in the journal Archaeometry, the study used precise dating of corn, cassava, and coca leaves from the burial site to anchor these historical events within the reign of Inca Emperor Huayna Capac.

How Researchers Dated the Inca Mummies

Archaeologists discovered the three mummies—a teenage girl known as the “Llullaillaco Maiden” and two younger children—near the summit of the Llullaillaco volcano in 1999. While previous radiocarbon testing on hair samples provided a broad window between 1430 and 1520, the recent research team, led by D. Sieczkowska-Jacyna, sought greater precision. By focusing on botanical offerings buried with the children, the team bypassed potential discrepancies associated with the mummies’ tissue. This multi-step chronological framework provides a more reliable estimate, narrowing the timeline to a 45-year window during the height of the Inca Empire.

The Historical Context of the Sacrifices

The 1499 date aligns with the expansionist policies of Huayna Capac, who ruled from 1493 to 1525. Historical records suggest that the Inca emperor traveled through the southern reaches of his territory, including regions of modern-day Argentina, to consolidate power. According to the study, the sacrifice was likely a state-sanctioned ritual intended to secure imperial authority or mark a significant political event in a recently incorporated region. This practice of Capacocha—the ritual sacrifice of children—served to integrate distant provinces into the Inca sociopolitical framework by creating sacred sites that anchored the empire’s presence in the landscape.

Why the Llullaillaco Maiden Remains Significant

The Llullaillaco Maiden is considered the primary sacrifice, while the two younger children likely served as attendants. Scientific analysis has previously established that the children were fed a high-status diet of maize and animal protein and were administered coca and alcohol in the months leading to their deaths. This preparation suggests that the victims were carefully selected and treated as sacred intermediaries before being left in a subterranean shrine on the freezing, high-altitude summit. The recent findings reinforce the theory that these ritual deaths were not isolated incidents but carefully orchestrated state events.

Future Directions in Bioarchaeology

The methodology used in this study establishes a new precedent for examining high-altitude sacrificial sites. By applying multi-step radiocarbon dating to associated organic materials rather than solely relying on human remains, researchers can better synchronize archeological findings with colonial-era chronicles and known climate events. The study authors suggest that future analyses of other Capacocha sites are essential to understanding whether these rituals increased in frequency as the Inca Empire faced external pressures, including the eventual arrival of European explorers.

Key Facts About the Llullaillaco Discovery

• Discovery Date: 1999, near the summit of the Llullaillaco volcano on the Argentina-Chile border.
• Primary Subjects: One teenage girl (“La Doncella”) and two younger children.
• Ritual Context: Evidence of Capacocha, a state-sanctioned Inca ritual involving high-status offerings.
• New Dating: 1462–1507, with a high probability of 1499, coinciding with the reign of Huayna Capac.