豆角砾岩组剖面中的蛇绿碎屑角砾岩

Milena Bohdanova, O. Hnylko
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引用次数: 0

摘要

目的。研究乌克兰内喀尔巴阡山脉Marmarosh Klippen地区Velyka Ugolka河上游露头Soymul鲕粒地层组成及形成条件特征,对再现该盆地古地理及其构造史具有重要的理论意义。方法。本工作采用传统的构造地质野外大比例尺测绘方法。结果。在野外工作中,对下白垩统Soimul火山岩的配套露头进行了地质填图和记录。对露头岩体的物质组成进行了研究,并探讨了橄榄岩的赋生条件和混合岩的基质。提出了下白垩统Soimul组形成的新模型。蛇绿碎屑角砾岩是第一次在蛇绿碎屑碎块的零散碎块露头中描述了特定的地层——蛇绿碎屑角砾岩,其中有几种类型是由碎片和胶结物的组成来区分的。现实意义。在详实的地质填图中,逆冲岩及其伴生混合杂岩(混杂岩和橄榄岩)的显示是保证地质图可靠性和条理性的必要条件。完善大尺度杂岩填图的理论和科学方法基础,对于确定新的构造标准、寻找矿物、预测危险地质过程和稳定地构造也具有重要意义。此外,在我们看来,所研究的部分是乌克兰喀尔巴阡山脉独特的地理旅游对象。关键词:吸积棱镜,蛇纹石形成,蛇纹石组合,蛇纹石角砾岩,蛇纹方解石。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
OPHIOLITOCLASTIC BRECCIAS IN THE SECTION OF THE SOYMUL OLISTOSTROME FORMATION
Purpose. Investigation .of the composition and features of the formation conditions of the Soymul olistostrome stratum in outcrops along the upper course of the Velyka Ugolka River in the Marmarosh Klippen Zone (Inner Ukrainian Carpathians), which is of important theoretical importance for the reproduction of the paleogeography of the basin and its tectonic history. Methodology. In this work there traditional structural-geological methods of field large-scale geomapping were used. Results. During the field work, geological mapping and documentation of the supporting outcrops of the Lower Cretaceous Soimul olistostrome was carried out. The material composition of the rocks in the outcrops was studied, the conditions of occurrence of olistoliths and matrix of the mixtites were investigated. A model of the formation of the Lower Cretaceous Soimul Formation is proposed Scientific novelty. For the first time, specific formations – ophiolithoclast breccias, several types of which are distinguished by the composition of fragments and cement – have been described in the outcrops among scattered fragments of ophiolitic assasia. Practical significance. In detailed geological mapping, the display of thrust and associated mixtite complexes (melanges and olistostomes) is a necessary condition for the reliability and conditionality of geological maps.The improvement of the theoretical and scientific-methodical basis of large-scale mapping of mixtites is also important for the identification of new tectonic criteria for the search for minerals, the forecast of dangerous geological processes, and geostable construction. In addition, the studied section, in our opinion, is a unique geotourism object of the Ukrainian Carpathians. Key words: accretion prism, olistostrome formation, ophiolite association, ophioliclast breccias, ophiocalcite.
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