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首页> 外文会议>Offshore technology conference (OTC 2001) >Stylolites in a Back-Reef Dolomite from the Permian Basin of New Mexico and West Texas
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Stylolites in a Back-Reef Dolomite from the Permian Basin of New Mexico and West Texas

机译：来自新墨西哥州和西德克萨斯州二叠纪盆地的后礁白云岩中的辉石

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Stylolites have been reported in basinal, reef, forereef, andrnbackreef carbonates within the Permian Basin of West Texasrnand southeastern New Mexico. They are described as serratedrninterfaces between carbonate rock units and are composed ofrntheir insoluble residues. Samples of stylolites and adjacentrnhost rock were examined using x-ray diffraction and analyticalrnelectron microscopy. The results revealed a very closernrelationship between the stylolite and its host rock. Stylolitesrnare the markers indicating that considerable thicknesses ofrnstrata may have been dissolved away during diagenesis of therncarbonate. The extent (thickness) of stylolite seams mayrnaffect the porosity and permeability of a carbonate formation.rnPresence of fine platelets of micas and sulfur along with thernorganic matter in stylolites can make them impermeable tornfluid flow and seal petroleum reservoirs. The comparativernstudy of the mineralogy of the stylolites and the acid-residuesrnof their immediate host rocks directly points to the origin ofrnthese stylolite seams in these dolostones. The stylolitesrnanalyzed consist mainly of quartz, feldspars, pyrite, mica,rnnative sulfur, and organic material. All these minerals werernfound to be the impurities in the enclosing host carbonate. Itrnwas estimated that about 100 mm of the host dolomite columnrnmust have been dissolved to generate a stylolite with arnthickness of about 1.0 mm.
机译：在西得克萨斯州和新墨西哥州东南部的二叠纪盆地内的盆地，礁，前礁和恩里弗礁碳酸盐中已报道有针石。它们被描述为碳酸盐岩单元之间的锯齿状界面，由其不溶性残渣组成。使用X射线衍射和电子分析显微镜检查了陨石和邻近岩体的样品。结果表明，辉石与它的宿主岩石之间的关系非常紧密。针状石是标志物，表明在碳酸盐岩的成岩过程中可能已溶解掉相当厚度的地层。花岗石接缝的范围（厚度）可能会影响碳酸盐岩地层的孔隙度和渗透率。—泥土中存在云母和硫磺的细小薄片以及有机质会使其成为不可渗透的流体流并封闭油气藏。辉石的矿物学和其直接宿主岩的酸性残渣的矿物学的比较研究直接指出了这些辉石接缝在这些白云岩中的起源。被分析的样式物主要由石英，长石，黄铁矿，云母，天然硫和有机材料组成。发现所有这些矿物都是封闭的宿主碳酸盐中的杂质。据估计，必须溶解约100毫米的主体白云石柱体，以生成具有约1.0毫米厚度的方柱石。

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