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http://dx.doi.org/10.7854/JPSK.2019.28.4.299

Provenance Estimation on the Yeoncheon Samgeori Obsidian Artifacts  

Yi, Seonbok (Department of Archaeology, Seoul National Unviersity)
Jwa, Yong-Joo (Department of Geology and Research Institute of Natural Science, Gyeongsang National University)
Jin, Mi-Eun (Department of Geology and Research Institute of Natural Science, Gyeongsang National University)
Kil, Youngwoo (Department of Energy and Resources Engineering, Chonnam National University)
Publication Information
The Journal of the Petrological Society of Korea / v.28, no.4, 2019 , pp. 299-306 More about this Journal
Abstract
We estimated the provenance of the obsidian artifacts from Samgeori site at Yeoncheon, one of the prehistoric sites in South Korea. Pyroxene microlites are of hedenbergite to augite compositions, and intergrown and/or overgrown with Fe-oxides showing poikilitic texture. Major oxides contents for the matrix of the obsidian artifacts exhibit a narrow compositional range, especially SiO2 contents being 73.0~75.5 wt.% of acidic rhyolitic composition. Also, rare earth element (REE) contents are relatively constant in the obsidian artifacts, and the chondrite-normalized REE patterns show a strong Eu negative anomaly. These mineralogical and geochemical features of the Samgeori obsidian artifacts were compared with those from both the Baekdusan obsidians and Japanese Kyushu obsidians which have been thought to be two major obsidian provenances around South Korea. It is suggested that the Samgeori obsidian artifacts were possibly originated from the Baekdusan obsidians.
Keywords
Yeoncheon Samgeori; obsidian artifacts; provenance; Mt. Baekdusan;
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