Rapid wood silicification in hot spring water: an explanation of silicification of wood during the Earth's history
Rapid wood silicification in hot spring water: an explanation of silicification of wood during the Earth's history
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DOI：
10.1016/j.sedgeo.2004.06.003
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发表时间：
2004-07-15
影响因子：
2.8
通讯作者：
Yamamoto, S
中科院分区：
文献类型：
--
作者：
Akahane, H;Furuno, T;Yamamoto, S
立山温泉的温泉水湖中二氧化硅含量高，容易析出二氧化硅球和蛋白石沉淀物。在湖的溢流流中发现了大量的自然倒下的木材碎片，这些木材被二氧化硅浸透。这些硅化作用是由于落木的裂面或细胞壁上的硅球沉淀所致。木材组织的纹理与地质记录中在火山地区附近形成的天然硅化木材上发现的纹理相同。这些结果解释了某些天然硅化木材碎片的形成机制，这些碎片似乎是在与温泉水相同的条件下形成的。为了确认硅化过程，将新鲜的桤木木材（Alnus pendula Matsumura）放入温泉水流中。通过在木材组织的细胞腔内沉积无定形二氧化硅球，在7年的时间里，实验木材碎片的硅化率接近40%，这一研究揭示了在适当的条件下，硅化木材可以在短至数十年至数百年的时间内形成，并有助于理解硅化木材的形成机理。(C)2004 Elsevier B. V.保留所有权利。
A hot spring water lake in Tateyama Hot Spring has a high content of silica and readily precipitates silica spheres and deposits of opal. Abundant fragments of naturally fallen wood impregnated with silica were found in the overflow stream of the lake. These silicifications resulted from the precipitation of silica spheres onto split surfaces or cell walls of the fallen wood. The textures of wood tissues are the same as those found on naturally silicified wood formed in the vicinity of volcanic regions in the geological record. These results explain the formation mechanism of certain naturally silicified wood fragments that seem to be formed under the same conditions as those found in the hot spring water.To confirm the silicification process, fresh wood pieces of alder wood (Alnus pendula Matsumura) were placed in the hot spring water stream. Experimental wood fragments were silicified to nearly 40% by weight over a period of 7 years by the deposition of amorphous silica spheres in cell lumina of wood tissue.This study reveals that silicified wood can form under suitable conditions in time periods as short as tens to hundreds of years, and contributes to the understanding of the mechanisms forming silicified wood. (C) 2004 Elsevier B.V. All rights reserved.