Abstract

The typomorphism and chemical composition of garnets and zircons were studied in the Pechora (Dnieper) and Vychegda (Moscow) Middle Neopleistocene moraines in the Laya and Vychegda river valleys of the northern and southern Timan–Pechora–Vychegda region, respectively, to substantiate a detailed subdivision and correlation of Quaternary sections. The moraines contain garnets of two color groups: orange and pink. Moraines in the Laya River valley are dominated by pink garnets. Thereby, their content in the Pechora moraine is higher than in the Vychegda moraine. The orange garnets from the Pechora moraine are dominated by pyrope–almandine with grossular admixture, while those from the Vychegda moraine are represented by five varieties, including almandine–spessartine ones. The pink garnets are mainly pyrope‒almandine in composition. The Vychegda moraine also contains grossular. In the Vychegda River valley, the Pechora moraine is enriched in pink garnets, while the Vychegda till is dominated by orange garnets. In both moraines, garnets are dominated by almandine, with variable amounts of pyrope and grossular impurities. The Pechora moraine, unlike the Vychegda moraine, contains the spessartine‒grossular‒almandine variety. The composition of pink garnets in both horizons in the Vychegda River valley is almost identical. Zircons from both moraines are similar in morphology and chemical composition. The presence of zircons in moraines is related to their redeposition from disintegrated igneous rocks of acid, intermediate, and basic compositions and metamorphic basement rocks. Values of the indicator ZrO₂/HfO₂ ratio in zircons from the Vychegda moraine in the northern part of the region (Laya River) indicate their supply from metamorphic complexes of the Northwestern (Fennoscandian) provenance and Northern Timan. Zircons in moraines in the Vychegda River valley were mainly redeposited from acid, intermediate, and basic igneous rocks, and only a insignificant part of them came from metamorphic rocks.

中文翻译：

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蒂曼-佩乔拉-维谢格达州北部和南部中新新世中部石榴石的石榴石和锆石的典型形态

摘要

在Timan–Pechora–Vychegda地区的北部和南部的Laya和Vychegda河谷的Pechora（第聂伯河）和Vychegda（莫斯科）中新新世中部的石榴石和锆石的打字性和化学成分得到了详细研究。第四纪部分的细分和相关性。mo子有两个颜色的石榴石：橙色和粉红色。拉亚河谷的葡萄树以粉红石榴石为主。因此，它们在Pechora冰ora中的含量高于在Vychegda冰ora中的含量。来自Pechora ora的橙色石榴石主要是焦糖-金刚烷与颗粒状混合物，而来自Vychegda ora的橙色石榴石则有五个变种，其中包括Almandine-Spessartine。粉红石榴石的成分主要为吡咯‒金刚烷。Vychegda冰ora还含有粒状。在Vychegda河谷中，Pechora的冰ora富含粉红石榴石，而Vychegda耕种则以橙色石榴石为主。在这两种鼠尾草中，石榴石均以金刚烷为主，并具有不同数量的吡啶和粗粒杂质。与Vychegda冰ora不同，Pechora冰ora含有斯巴沙汀，‒，‒，扁桃品种。在维谢格达河流域的两个视野中，粉红石榴石的成分几乎相同。两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 Pechora的冰ora富含粉红色的石榴石，而Vychegda酒瓶则富含橙色的石榴石。在这两种鼠尾草中，石榴石均以金刚烷为主，并具有不同数量的吡啶和粗粒杂质。与Vychegda冰ora不同，Pechora冰ora含有斯巴沙汀，‒，‒，扁桃品种。在维谢格达河流域的两个视野中，粉红石榴石的成分几乎相同。两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 Pechora的冰ora富含粉红色的石榴石，而Vychegda酒瓶则富含橙色的石榴石。在这两种鼠尾草中，石榴石均以金刚烷为主，并具有不同数量的吡啶和粗粒杂质。与Vychegda冰ora不同，Pechora冰ora含有斯巴沙汀，‒，‒，扁桃品种。在维谢格达河流域的两个视野中，粉红石榴石的成分几乎相同。两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 含不同量的吡啶鎓和总杂质。与Vychegda冰ora不同，Pechora冰ora含有斯巴沙汀，‒，‒，扁桃品种。在维谢格达河流域的两个视野中，粉红石榴石的成分几乎相同。两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 含不同量的吡啶鎓和总杂质。与Vychegda冰ora不同，Pechora冰ora含有斯巴沙汀，‒，‒，扁桃品种。在维谢格达河流域的两个视野中，粉红石榴石的成分几乎相同。两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值 两种mo的锆石在形态和化学组成上均相似。mo石中锆石的存在与其从酸，中，基本成分的分解火成岩和变质基底岩中的再沉积有关。指标ZrO的值该区域北部（拉雅河）的维谢格达冰ora中的锆石中₂ / HfO _2的比值表明它们是从西北（芬诺斯堪的亚）起源和北提曼的变质复合物中供给的。Vychegda河谷的冰晶中的锆石主要从酸性，中性和碱性火成岩中再沉积，而其中只有很少一部分来自变质岩。