Dear Professor Fotoohi Rad
As far as I know, komatiites are mostly Archean and Proterozoic. There are some good articles in this field, the links of which are attached below.
best regards
Article Plume-related mafic volcanism and the deposition of banded i...
https://www.sciencedirect.com/science/article/abs/pii/B978044463901100006X
Most sources indicate komatites formed during the Archean to early Proterozoic eras. Attached are some citations to verify:
Grove, T., & Parman, S. (2004). Thermal evolution of the Earth as recorded by komatiites. Earth and Planetary Science Letters, 219(3-4), 173-187. https://doi.org/10.1016/S0012-821X(04)00002-0
https://www.sciencedirect.com/topics/earth-and-planetary-sciences/komatiite
Komatiites are ultramafic volcanic rocks that are rich in magnesium and have a distinctive texture formed from rapid cooling of lava. They are significant because they provide information about the early Earth's mantle and the conditions under which the Earth's crust formed.
Komatiites are primarily found in the Archean eon, which spans from about 4 billion to 2.5 billion years ago. This is because the Earth's mantle was hotter during the Archean, allowing for the formation of the high-temperature magmas necessary to produce komatiites. The peak period for komatiite formation is around 3.5 to 2.7 billion years ago.
In later geological periods, the Earth's mantle cooled down, making the conditions less favorable for the formation of komatiites. Consequently, while komatiites can still be found today, they are predominantly remnants of ancient volcanic activity from the Archean eon, often preserved in greenstone belts, which are regions of variably metamorphosed volcanic and sedimentary rocks.
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