Fig. 1: The age and composition of lunar mare volcanism compared with the palaeointensity record.
From: An intermittent dynamo linked to high-titanium volcanism on the Moon
Non-null palaeointensities (black circles represent mean values) and palaeointensities within an error of zero (grey circles represent mean values) with 1σ palaeointensity uncertainty reported from literature (vertical error bars) and 2σ age uncertainty from U–Pb dating (horizontal error bars) for returned samples (Supplementary Table 1) are compared with the age and composition of lunar mare basalts based on crater counting and remote spectral data (coloured error bars; 1σ uncertainty reported from literature17,18). Light blue box represents the total duration of mare volcanism; the yellow box represents the duration of the IHIE used in this study. All but one of the non-null palaeointensities coincides with the duration of mare volcanism, and this early palaeointensity may be explained by tidal heating48 (Supplementary Information section 2).
