Abstract

In the vicinity of Yücepinar Village of Zile district of Tokat province, there are silicified wood formations in agglomerate levels in the Çekerek formation Middle Eocene aged. These formations consist of well— preserved tree trunks of about 1.5 m in diameter or branches and trunk parts in mm—1 m length. Generally, they are open-brownish cream; in some places they demonstrate dark brown, green, and blue colors. According to XRD and FT-IR analysis results of the samples, it is determined that the silicified wood formations are composed of quartz, cristobalite, malachite, azurite, hematite, graphite, and goethite minerals. According to XRF and ICP-MS analyzes of silicified woods, the high iron content (Fe₂O₃ 8.29–63.79%) in the samples causes red brown color while the increase in copper content (Cu >10 000 ppm) causes blue and green colors. As a result of the cabochon cuts made from the silicified wood samples to be used for jewellery, products which have rich color composition and silky brilliance, keep the polish well and with high-strength are obtained. Particularly because of its color compositions, it is separated from similar silicified wood samples on the Earth. As a result of the surface studies carried out in the study area, it was observed that the silicified wood formations did not propagate much. In order to determine the reserves of these formations, which are thought to have significant economic value, it is necessary to carry out a more detailed exploration activity with trenching and drilling in the region.

中文翻译：

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中始新世Çekerek组中的硅化木由孔雀石、蓝铜矿和赤铁矿组成，土耳其托卡特

摘要

在托卡特省 Zile 区 Yücepinar 村附近，在中始新世时代的Çekerek 地层中存在结块水平的硅化木地层。这些地层由保存完好的直径约 1.5 m 的树干或直径约 1 m 的树枝和树干部分组成。通常，它们是开放的棕色奶油；在某些地方，它们表现出深棕色、绿色和蓝色。根据样品的XRD和FT-IR分析结果，确定硅化木地层由石英、方石英、孔雀石、蓝铜矿、赤铁矿、石墨和针铁矿矿物组成。根据硅化木的 XRF 和 ICP-MS 分析，高铁含量（Fe ₂ O ₃样品中的 8.29–63.79%) 导致红棕色，而铜含量的增加 (Cu >10 000 ppm) 导致蓝色和绿色。由于将用于珠宝的硅化木样品制成凸圆形切割，因此获得的产品具有丰富的色彩成分和柔滑的光泽，保持良好的抛光度和高强度。特别是由于它的颜色成分，它与地球上类似的硅化木样本不同。作为在研究区进行的地表研究的结果，观察到硅化木地层没有大量繁殖。为了确定这些被认为具有重要经济价值的地层的储量，有必要在该地区进行更详细的勘探活动，包括挖沟和钻探。