阿塞拜疆Talysh地区始新世粗面玄武岩-粗面山岩-玄武岩-phonolite组地质岩石学特征

IF 0.4 Q4 GEOSCIENCES, MULTIDISCIPLINARY
V. Karimov
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引用次数: 0

摘要

本文讨论了塔里什带始新世粗面玄武岩-川玄岩-玄武岩-phonolith形成的结晶阶段。测定了阿塞拜疆Talysh地区始新世火山活动的原始岩浆组成、演化和初始熔体的熔融率。塔里什带粗面玄武岩-粗面玄武岩-玄武岩-phonolith形成的始新世火山作用。通过x射线光谱和x射线荧光分析,进行了岩石学、石油化学、岩石地球化学、矿物共生标型特征、岩石化学组成等方面的研究。分析表明,塔里什带形成于始新世。确定了原岩浆的演化阶段和共生岩矿物的标型特征。本文研究了在不同深度的中间腔室中直接参与结晶过程的共生共生矿物中微量元素的分布。目前,出现的问题是需要澄清火成岩杂岩的标型特征,作为决定其形成的地球动力学机制的因素,并确定潜在的矿石含量。给出了火山岩的岩石学和石油化学特征。结果表明,如果早-中始新世的分异过程较为明显,初期形成较多的镁质岩石品种(铁榴辉岩-粗面玄武岩),随后形成较多的含铁岩石品种(粗面玄武岩和粗面玄武岩),那么在斑岩质粗面玄武岩中则没有这种铁的富集。这一石油化学特征明显与火山作用断裂的持续时间有关,这是由厚厚的沉积-凝灰质地层的形成引起的,并伴随着中等成分的中间室的形成和表现。晚始新世的火山作用是未分化的,不伴有中等差异的形成。晚始新世白闪石的出现为碱性分支,过渡性品种的缺失表明白闪玄武岩和白闪石的自主发育。从始新世火山作用表现的早期到后期,沿侧向物质组成的变化表现为碱性较强的相表现,且明显以K优于Na为主,与松顺石系列的差异对应较大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Some geological and petrological characteristics of the Eocene trachybasalt-trachyandesite- basalt-phonolite formation of the Talysh zone (Azerbaijan)
This article discusses the stages of crystallization of the Eocene trachybasalt-tra- chyandesitebasalt-phonolith formation of the Talysh zone. Determination of the composi- tion of the primary magma, evolution and melting fraction of the initial melt of the Eocene volcanism of the Talysh zone within Azerbaijan. Eocene volcanism of the trachybasalt-tra-chyandesitebasalt-phonolith formation of the Talysh zone. Petrographic, petrochemical, geochemical studies of rocks, typomorphic features of mineral paragenesis, chemical composition of rocks were carried out by X-ray spectral and X-ray fluorescence analysis. The analyzes of the conducted studies show that the Talysh zone was formed in the Eocene time. Stages of evolution of the original magma and typomorphic features of mineral parageneses have been established. The distributions of microelements in mineral parageneses, which are direct participants in the crystallization processes that took place in intermediate chambers at different depths, have been studied. At present, the question arises of the need to clarify the typomorphic features of igneous complexes, as factors that determine the geodynamic regimes of their formation, and to determine the potential ore content. The petrographic and petrochemical characteristics of the volcanic rocks are given. It was found that if the process of differentiation in the Early-Middle Eocene was more distinct with the initial formation of more magnesian rock varieties (picrite-trachybasalts), and subsequently more ferruginous ones (trachyandesites and trachyandesitebasalts), then such accumulation of iron is not observed in porphyritic trachyandesites. This petrochemical feature is obviously associated with the duration of the break in volcanism, caused by the formation of a thick sedimentary-tuffaceous stratum, accompanied by the initiation and manifestation of an intermediate chamber of medium composition. Volcanism in the Late Eocene was undifferentiated and was not accompanied by the formation of medium differences. The appearance in the late Eocene of leucite phonolites, which represent an alkaline branch, and the absence of transitional varieties indicate the autonomous development of vit- robasalts and leucite phonolites. It is concluded that from the early phases of the manifestation of Eocene volcanism to the later phases, the change in the material composition along the lateral is expressed in the manifestation of more alkaline facies with a significant predominance of K over Na and with a greater correspondence to the differentials of the shoshonite series.
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来源期刊
Journal of Geology Geography and Geoecology
Journal of Geology Geography and Geoecology GEOSCIENCES, MULTIDISCIPLINARY-
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