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在柱状结合碳酸盐源岩中,有机物质燃烧的地化学指标由火成形控制

Issa Makhlouf¹, Khalil M Ibrahim¹, Samer Aljurf²

¹Department of Earth and Environmental Sciences, Prince El Hassan Bin Talal Faculty of Natural Resource and Environment, The Hashemite University, Zarqa 13133, Jordan.

|November 3, 2025

概括

通常在火性岩石中发现的柱状关节,在约旦的有机丰富的碳酸盐源岩中被发现. 这一独特的地质发现是由于地下热变化和内源性燃烧造成的.

科学领域:

地质地质地质地质地质地
沉积岩石学沉积岩石学
地质化学地质化学

背景情况:

柱状关节在岩石中很常见,但在沉积层中很少见.
富含有机碳酸盐的源岩,如Muwaqqar岩 (MCM) 形成,对于碳化合物勘探至关重要.
了解不同寻常的地质构造有助于解释古环境条件和基因遗传过程.

研究的目的:

在有机丰富的碳酸盐泥岩中描述柱状关节的几何和岩石学特征.
研究与柱状关节发育相关的矿物学和地化学变化.
为了确定这些独特的蜂巢形状泥岩的形成机制.

主要方法:

对岩石样本进行详细的岩石分析.
地质化学调查,包括总有机碳 (TOC) 含量分析.
联合几何学和地层学背景的现场观测.

主要成果:

在约旦中部的MCM构造中发现了一组完善的多边形横截面的垂直柱状接头.
这些连接形成了一个2米厚的间隔,逐渐向下,柱子直径从3到1厘米.
与周围的层相比,关节间隔中TOC含量显著降低 (<1重量%) (平均15重量%) 表明燃烧.

结论:

这种碳酸盐泥岩中的柱状关节归因于地下热变化和有机丰富的源岩的内源性燃烧.
在有机物消耗过程中的体积收缩和在燃烧过程中的再结晶导致了关节的形成.
这项研究记录了一种罕见的地质现象,扩大了已知的柱状连接在层级记录中的发生情况.

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