Microgravimetry for cavity detection–an example from pilot measurements on Newgrange passage tomb (Brú na Bóinne World Heritage Site, Ireland)

Pilot microgravimetric surveys at Newgrange, a Neolithic passage tomb within Ireland's Brú na Bóinne World Heritage Site, demonstrate the potential of this geophysical technique to detect subsurface cavities. The study revealed distinct gravitational anomalies corresponding to known and previously undocumented voids beneath the monument, including the central chamber and surrounding structures. Microgravimetry, which measures variations in local gravity caused by density contrasts, proved effective in identifying subterranean features without invasive excavation. This non-destructive method offers a valuable tool for archaeological prospection at heritage sites, complementing traditional survey techniques while minimizing risk to fragile monuments.

Pasteka, R., Zahorec, P., Papco, J., Brady, C., & Barton, K. (2019). Microgravimetry for cavity detection–an example from pilot measurements on Newgrange passage tomb (Brú na Bóinne World Heritage Site, Ireland). New Global Perspectives on Archaeological Prospection, 87–90. https://doi.org/10.2307/jj.15135979.26