Thermal Alteration of Silica Minerals: An Archeological Approach
Thermal Alteration of Silica Minerals: An Archeological Approach
复制标题
二氧化硅矿物的热蚀变：考古学方法
DOI：
10.1126/science.173.3994.322
复制
发表时间：
1971
期刊：
影响因子：
56.9
通讯作者：
M. Mumma
中科院分区：
文献类型：
--
作者：
E. P. Kiver;M. Mumma
大量的实验表明，对燧石材料的加热可能使原始人在制造石制工具时占有优势。当佛罗里达燧石慢慢加热到350 - 400℃，并在此温度下保持一段时间后，裂缝性质会发生理想的变化。当晶间间隙内的杂质达到熔点时，就会发生这种变化；因此，当石英以外的材料作为助熔剂时，石英的微晶体会更紧密地结合在一起。
Extensive experiments indicate that the application of heat to flint materials may have conferred an advantage to primitive man in the manufacture of chipped-stone implements. When Florida cherts are slowly heated to between 350� and 400�C and maintained at this temperature for sustained periods, a desirable change occurs in the fracture properties. This alteration takes place when the melting point of the impurities within the intercrystalline spaces is reached; thus the microcrystals of quartz are fitted closer together when materials other than quartz serve as fluxes.