Characterization of Neolithic Jade Objects from Shimao and Xinhua, Shaanxi Province, China, Using Handheld Portable Techniques
50 jade objects from the Late Longshan period, excavated from the Shimao (25) and Xinhua (25) Neolithic sites, were characterized mineral groups using handheld X-Ray Fluorescence (hhXRF) and handheld specular reflectance Fourier transform infrared spectroscopy (hhFTIR). The objects were found to belong to three types of minerals. 22 objects found in Shimao (88%) are nephrite (19 tremolites and 3 actinolites), two are calcite and one antigorite. From Xinhua, 9 objects (36 %) are nephrite (tremolites), 14 are antigorites, one is calcite, and one chlorite. The higher percentage of nephrite jades found in Shimao confirms its high status and affluence. The minerals were classified into subgroups using HHXRF. All Shimao nephrites, and all but one from Xinhua, are D-type nephrites. Only one Xinhua nephrite is an S-type nephrite. Based on R* values, the D-type nephrites were divided into four groups. The largest group (R*: 0.980 to 0.995) includes 8 nephrites from Xinhua and 14 nephrites from Shimao, indicating possible common geological origins. The Xinhua antigorites were classified into three groupings based on Ni, Cr and Al content. These results can be used to build a database of jade objects from the Late Longshan culture to help establish the origin of undocumented jades.
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Characterization of Neolithic Jade Objects from Shimao and Xinhua, Shaanxi Province, China, Using Handheld Portable Techniques. Corinne Deibel, Michael Deibel, Jiqiao Shi, Johnathon Hornak, Hannah Munro. Presented at The 81st Annual Meeting of the Society for American Archaeology, Vancouver, British Columbia. 2017 ( tDAR id: 431685)
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min long: 66.885; min lat: -8.928 ; max long: 147.568; max lat: 54.059 ;
Abstract Id(s): 15867