Abstract The high mountainous southeastern part of Russian Altai is characterized by complicated sedimentation history. As a result of tectonic movements, Paleogene, Neogene, and even more old Carboniferous and Jurassic organicrich deposits had been partly uplifted and exhumed on the ridge’s slopes, where during the Pleistocene, they were affected by various exogenous processes including glaciation, glacio-fluvial erosion, winnowing activity of ice-dammed lakes, sliding during lake-draining events, followed by further intensive Holocene erosion, pedogenesis, and permafrost formation/degradation. Remobilized ancient organic matter had been involved into geomorphic and pedogenesis processes and affected the results of radiocarbon dating. Numerous radiocarbon ages obtained revealed several typical problems in interpretation of dating results, which was confirmed by multidisciplinary investigations of associated sediments in a wider regional context. This article presents a discussion on obtained apparent radiocarbon dates of organic material from ten sections of the SE Altai. In addition to radiocarbon analysis, in each case multidisciplinary study was carried out in order to properly interpret obtained dates, as well as to explain the inability of directly using apparent 14C ages as a geochronological basis for paleogeographical reconstruction. The analysis presented is of vital importance for establishing the chronology of formation of large ice-dammed lakes and their cataclysmic draining; revealing chronology and paleoenvironmental conditions of pedogenesis in the highlands of the SE Altai; and estimating the range and magnitude of the tectonically driven topography rebuilding in the post-Neogene time.

中文翻译：

---

富含有机物矿床的放射性碳测年：俄罗斯阿尔泰高原古地理解释的困难

摘要 俄罗斯阿尔泰东南部高山多山，沉积历史复杂。由于构造运动，古近纪、新近纪，甚至更古老的石炭纪和侏罗纪的富有机质沉积物在山脊的斜坡上被部分抬升和挖掘，在更新世期间，它们受到各种外源作用的影响，包括冰川作用、冰川-河流侵蚀，冰坝湖泊的风选活动，在湖泊排水事件期间滑动，随后是全新世进一步强烈的侵蚀、成土作用和永久冻土的形成/退化。再活化的古代有机质参与了地貌和成土过程，并影响了放射性碳测年的结果。获得的大量放射性碳年龄揭示了测年结果解释中的几个典型问题，在更广泛的区域范围内对相关沉积物进行多学科调查证实了这一点。本文讨论了从阿尔泰东南部 10 个部分获得的有机物质的表观放射性碳日期。除了放射性碳分析外，在每种情况下都进行了多学科研究，以正确解释获得的日期，并解释无法直接使用表观 14C 年龄作为古地理重建的地质年代学基础。所提供的分析对于确定大型冰坝湖泊的形成及其灾难性排水的年表至关重要；揭示阿尔泰东南部高地成土的年代学和古环境条件；