Below is a plot for a higher-resolution K = 11 admixture analysis that includes a Chinchorro mummy sample from Chile dated to 3972–3806 BC. This analysis uses a much larger number of transversion SNPs for all samples than my earlier admixture analyses. While most of my admixture analyses have used 1,067 transversion SNPs for the Chinchorro sample, and my previous high-resolution admixture analyses used 2,055 transversion SNPs for the sample, this analysis uses 26,982 transversion SNPs for the sample.
Here are the new admixture percentages for the Chinchorro sample:
The sum of the non-Amerindian component percentages in this analysis is 41.49%, which is consistent with the K = 8, 9, and 10 analyses.
The Chinchorro sample has 1.536 times more of the plain blue component than the light blue component, unlike the Spanish admixture in Mestizos, where there’s significantly more of the light blue component than the plain blue component.
The trace amount of the pine green component in the Chinchorro sample is inconsistent with modern contamination, as all modern Europeans have a significant amount of this component.
The presence of the purple component in the Chinchorro sample is also inconsistent with modern contamination.
If one ignores the absence of the plain green component in the Chinchorro sample, then pre-LGM Europeans remain one possible source of its European admixture.
If one ignores the presence of the purple component in the Chinchorro sample, then European hunter-gatherers with some early European farmer admixture could be another possible source of its European admixture.