TY - JOUR
T1 - Were South India, the North China Craton, and the Korean Peninsula contiguous in a Neoarchaean supercontinent? New geochemical and isotopic constraints
AU - Thanooja, P. V.
AU - Williams, I. S.
AU - Satish-Kumar, M.
AU - Durgalakshmi,
AU - Zhai, M. G.
AU - Oh, C. W.
AU - Windley, B. F.
AU - Sajeev, K.
N1 - Publisher Copyright:
© 2021
PY - 2021/10
Y1 - 2021/10
N2 - The composition and configuration of possible Archaean supercontinents remain unresolved. Kenorland, a Neoarchaean supercontinent containing the Southern Granulite Terrane (SGT) in South India, the eastern block of the North China Craton (E-NCC), and the north-central Korean Peninsula, was probably assembled at ca. 2.5 Ga. A detailed comparison of meta-granitoid samples from the Madras Block (SGT), the Yishui Terrane (Shandong Peninsula, E-NCC), and Daeijak Island (NW-Gyeonggi Massif, Korean Peninsula) demonstrates their close similarities in geological setting, age, petrochemistry, isotopic composition and metamorphic history. They were all formed at 2.6–2.5 Ga and metamorphosed at a high grade soon after ca. 2.5 Ga. All are LREE-enriched and HREE-depleted, have low 87Sr/86Sri (0.70201–0.70375) and similar near-chondritic ƐNd(T) (+1.2 to −1.9). These factors, and their close match of geological features, suggest that the three terranes were once contiguous as part of a Neoarchaean supercontinent.
AB - The composition and configuration of possible Archaean supercontinents remain unresolved. Kenorland, a Neoarchaean supercontinent containing the Southern Granulite Terrane (SGT) in South India, the eastern block of the North China Craton (E-NCC), and the north-central Korean Peninsula, was probably assembled at ca. 2.5 Ga. A detailed comparison of meta-granitoid samples from the Madras Block (SGT), the Yishui Terrane (Shandong Peninsula, E-NCC), and Daeijak Island (NW-Gyeonggi Massif, Korean Peninsula) demonstrates their close similarities in geological setting, age, petrochemistry, isotopic composition and metamorphic history. They were all formed at 2.6–2.5 Ga and metamorphosed at a high grade soon after ca. 2.5 Ga. All are LREE-enriched and HREE-depleted, have low 87Sr/86Sri (0.70201–0.70375) and similar near-chondritic ƐNd(T) (+1.2 to −1.9). These factors, and their close match of geological features, suggest that the three terranes were once contiguous as part of a Neoarchaean supercontinent.
KW - Daeijak Island
KW - Madras block
KW - Neoarchaean supercontinent
KW - Opx-absent meta-granitoids
KW - Opx-bearing meta-granitoids
KW - Yishui Terrane
UR - http://www.scopus.com/inward/record.url?scp=85108406144&partnerID=8YFLogxK
U2 - 10.1016/j.lithos.2021.106294
DO - 10.1016/j.lithos.2021.106294
M3 - Article
SN - 0024-4937
VL - 398-399
JO - Lithos
JF - Lithos
M1 - 106294
ER -