Early Tibetan: Voices from the High Plateau

The Early_Tibetan assemblage records human presence on the high plateaus and river valleys of Tibet across an exceptionally long span. Archaeological data indicates occupation at named sites including Zongri (Hainan), Ousui and Ounie (Nagqu), Sila (Shigatse), Piyangjiweng (Ngari), Yushu, Yusa (Shannan), Rangjun, Zhangcun and Sding Chung (Shigatse). Some radiocarbon or contextual ages extend into deep prehistory (an earliest reported date ~24562 BCE), suggesting either isolated Pleistocene deposits or issues of material association and dating that require careful reevaluation. More securely dated Holocene contexts document repeated use of alpine meadows, river terraces and sheltered valleys.

Limited evidence suggests continuity in place use across millennia: seasonal hunting and foraging sites give way, in later periods, to pastoral and small-scale agropastoral settlements. The material record — lithics, hearths, faunal remains and occasional mortuary contexts — speaks to adaptive strategies in thin air and cold, where mobility, herd animals and local plant use would shape lifeways. Archaeological interpretation must remain cautious: stratigraphic mixing, variable preservation and the patchy nature of surveys mean that claims of uninterrupted occupation should be framed as provisional. Genetic data (see below) helps to test hypotheses of continuity versus population replacement and mobility across the plateau.

The genetic profile of the 48-sample Early_Tibetan collection provides a tangible bridge between bones and behavior. Y-chromosome haplogroups are dominated by N (14), with notable counts of O (6), D (5), C (3) and a single CT lineage. Maternal lineages are represented by G (5), D (4), D4i (3), M (3) and A6 (1). These markers together suggest a complex web of ancestry with major contributions from northeastern and high-altitude East Asian lineages.

Haplogroup N is often associated with northern East Asian hunter-gatherer and forest-steppe groups; its prominence here may reflect north–northeastern connections into parts of the plateau. Haplogroup D — seen in Tibetans and some Andaman and East Asian populations — appears at moderate frequency and is consistent with lineages associated with high-altitude adaptation zones. Haplogroup O reflects broader East Asian agricultural expansions; its presence points to gene flow from lowland agrarian groups at various times. Maternal haplogroups G, D and M are common across northern and eastern Asia and align with regional Holocene demographics.

Caveats: while 48 samples are a meaningful dataset for the plateau, temporal heterogeneity (samples span ~25,000 years to recent centuries) complicates chronological interpretation. Population continuity, admixture timing and links to cultural transitions require denser temporal sampling and formal modeling. Haplogroups indicate ancestry components but do not map cleanly onto language, culture or subsistence without integrated archaeological context.