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首页> 外文期刊>Materials science & engineering. C, Biomimetic and supramolecular systems >Mineralogy of microbial fossil-like textures in the Precambrian Marble Bar chert and Gunflint chert
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Mineralogy of microbial fossil-like textures in the Precambrian Marble Bar chert and Gunflint chert

机译：前寒武纪大理石巴尔石和冈弗林特石中微生物化石样质地的矿物学

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摘要

Examining two Precambrian chert samples in which microbial fossil-like structures have been reported, textures of the microbial-fossils or similar components were mineralogically described. The Gunflint chert of 1.9 Ga and the Marble Bar chert of 3.5 Ga were used. Microbial fossil-like textures in the Gunflint chert were composed mineralogically of three different parts: the core, middle and outer rim. Among them, the inner core consists of apatite, having a slightly irregular shape. It cannot consistently be confirmed that this is biogenic but these mineral textures are an important factor, possibly supporting the origin of biogenesis. In the black part of Marble Bar chert, carbon materials can be found, covering rounded quartz grains in TEM observations. HRTEM examinations show that the black part contains not only amorphous organic matter but also low crystalline graphite structures.
机译：检查两个已报道微生物化石样结构的前寒武纪石样品，从矿物学角度描述了微生物化石或类似成分的质地。使用1.9 Ga的Gunflint and石和3.5 Ga的Marble Bar石。芒特弗林特石中微生物化石样的质地在矿物学上由三个不同部分组成：核心，中部和外缘。其中，内芯由磷灰石组成，其形状略微不规则。不能始终证实这是生物成因的，但是这些矿物质质地是重要的因素，可能支持生物发生的起源。在Marble Bar石的黑色部分，可以找到碳材料，在TEM观测中覆盖了圆形的石英颗粒。 HRTEM检查显示，黑色部分不仅包含非晶态有机物，而且还包含低结晶度的石墨结构。

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