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This data article provides zircon U–Pb and Lu–Hf isotopic information along with whole-rock Sm–Nd, Sr and Pb isotopic geochemistry from granitoids in Thailand. The U–Pb ages are described and the classification of crystallisation and inherited ages are explained. The petrography of the granitoid samples is detailed. The data presented in this article are interpreted and discussed in the research article entitled “Probing into Thailand’s basement: New insights from U–Pb geochronology, Sr, Sm–Nd, Pb and Lu–Hf isotopic systems from granitoids” (Dew et al., 2018).

The Indosinian Orogeny brought together a number of continental blocks and volcanic arcs during the Permian and Triassic periods. Prior to the orogeny, carbonate platforms and minor clastic sediments were deposited on the margins of these continental blocks. The Khao Khwang Platform formed along the southern margin of one continental fragment of the Indochina Block and was deformed in the early Triassic creating the Khao Khwang Fold-Thrust Belt.

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