Changes in mineralogical composition occurring in the course of preparation of drinking water in-situ are studied based on the data from the monitoring wells of the Tunguska groundwater intake. Intensive dissolution of feldspars, pyroxenes, siderite, and, to a lesser extent, quartz with the formation of secondary minerals (amorphous silica, clay minerals, and secondary siderite) occur in the aquifer of the Tunguska intake. In addition, solid products of the destruction are formed, including microfragments of minerals, which together with the primary clay, secondary minerals, and oxides and hydroxides of iron and manganese that originated in the process of intralayer oxidation of water, participate in the colmatation of cracks and the slit space of the well filters. Regeneration actions result only in a partial recovery of the specific flow rate of the wells, since the hydrochloric acid used in them leaches only the oxide–hydroxide part of the colmatant, leaving virtually unchanged its aluminosilicate component.

中文翻译：

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阿穆尔河-通古斯卡（Amur-Tunguska）汇流层含水层中的天然和成矿矿物形成

根据通古斯卡（Tunguska）地下水取水口监测井的数据，研究了就地饮用水制备过程中发生的矿物成分变化。通古斯卡进水层中发生长石，辉石，菱铁矿以及石英（次要程度较轻）的强烈溶解，形成次生矿物（无定形二氧化硅，粘土矿物和次生菱铁矿）。此外，形成破坏的固体产物，包括矿物质的微碎片，它们与水的层内氧化过程中产生的初级粘土，次要矿物以及铁和锰的氧化物和氢氧化物一起参与裂缝和滤池的狭缝空间。