First Results on Understanding the Shiny Surfaces of Heat-Treated Chert
First Results on Understanding the Shiny Surfaces of Heat-Treated Chert
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DOI：
10.1080/01977261.2020.1782590
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发表时间：
2020-06-23
影响因子：
1.7
通讯作者：
Schmidt, Patrick
中科院分区：
文献类型：
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作者：
Bachellerie, Julie;Schmidt, Patrick
在欧洲，在Solutrean（约25.5-23 ka cal BP）期间首次出现了对硅岩进行有意热处理以提高其敲击质量。对组合体中经过热处理的文物的识别是基于宏观标准，例如闪亮的光泽。然而，表面光泽可能容易受到观察者偏差的影响，需要更多的客观措施来量化它。在这项研究中，我们使用激光扫描显微镜来测量不同温度热处理后打磨表面的微浮雕。我们的结果显示了新鲜断裂表面的粗糙度随加热温度的变化。粗糙度似乎是热处理引起的宏观可观察表面光泽度的良好代表。这种 Ra 测量甚至有可能成为识别热处理的新工具。
In Europe, intentional heat treatment of silica rocks to improve their knapping quality appeared for the first time during the Solutrean (ca 25.5-23 ka cal BP). The recognition of heat-treated artefacts in assemblages is based on macroscopic criteria like shiny luster. Surface luster or gloss, however, may be prone to observer bias and calls for more objectives measures to quantify it. In this study, we use a laser scanning microscope to measure the micro-relief on surfaces knapped after heat treatment at different temperatures. Our results show the evolution of the roughness of fresh fracture surface as a function of heating temperatures. Roughness appears to be a good proxy for macroscopically observable surface gloss caused by heat treatment. Such Ra measurements even bear the potential to become a new tool for the recognition of heat treatment.