Abstract

The paper presents the geological setting, structure, lithology, and placer-controlling factors in the Krasnokutsk placer rare metal–titanium deposit located in Miocene sediments on the northeastern slope of the Dnieper-Donets Depression. The identified lithofacies (alluvial-deltaic, coastal- and shallow-marine, eolian) complexes correspond to the lower (Aquitanian), middle (Burdigalian), and upper (Langian) subformations of the Miocene Novopetrovsk Formation. Placer bodies are confined to the littoral coastal-marine complexes of the middle Novopetrovsk subformation. Placer formation is related to coastline stabilization phases at the regressive stage of the Sub-Paratethys Basin existence. The main prospecting criteria for the identification of promising sectors in the Kharkov–Sumy placer zone are: coastline stabilization areas of the regressive stage of the middle Novopetrovsk basin evolution and development of transverse alluvial-deltaic structures that delivered into the basin low-metalliferous sediments, which distorted the monotonous pattern of alongshore transport and played the role of structural-sedimentational traps. The developed digital lithostructural model of the Krasnokutsk deposit makes it possible to propose a criterion complex for a comparative assessment of different sectors of the deposit to define the priority order of their development. The mineral composition of productive rocks is typical of placers for the study region and rare metal–titanium placers in general. Increased rutile and zircon contents, which augment the industrial value of placers in this zone, are related to the influence of crystalline rocks of the Voronezh Massif.

中文翻译：

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克拉斯努库茨克稀有金属-钛砂矿床（乌克兰）的岩石构造地质成因模型和矿物组成

摘要

本文介绍了位于第聂伯-顿涅茨De陷东北坡中新世沉积物中的克拉斯诺库茨克砂矿稀有金属-钛矿床的地质背景，结构，岩性和砂矿控制因素。识别出的岩相（冲积-三角洲，沿海和浅海，风积）复合体对应于中新世新沃尔佩特罗夫斯克组的下部（阿基坦），中部（布尔迪加利）和上部（兰吉亚）地层。砂矿体仅限于中部新petpetrovsk的沿海沿海海洋综合体。砂岩的形成与亚帕拉西提斯盆地存在的回归阶段的海岸线稳定阶段有关。在哈尔科夫-苏米砂矿区中确定有前途部门的主要勘探标准是：新沃尔佩特罗夫斯克盆地中部回归期的海岸线稳定区演化和横向冲积-三角洲构造的发育，这些构造进入盆地的低金属含量沉积物，扭曲了沿岸运输的单调模式，并发挥了结构沉积陷阱的作用。克拉斯诺库茨克矿床开发的数字岩石结构模型使得有可能提出一个标准综合体，用于对矿床不同部门进行比较评估，从而确定其开发的优先顺序。生产性岩石的矿物成分是研究区域典型的砂矿，而一般来说是稀有金属钛砂矿。金红石和锆石含量增加，从而增加了该区域砂矿的工业价值，