Most trace elements, including manganese and arsenic, get into the water through the natural process of rock weathering.
大部分微量元素，包括锰和砷，通过自然过程中的岩石风化作用进入水体。
2
Rock magnetism is strongly correlated with the content of paramagnetic impurities (iron and manganese).
岩石的磁性与其顺磁杂质（铁和锰）的含量有关。
3
There are gold, silver, iron, manganese, molybdenum, uranium, mica, vermiculite, quartz rock, feldspar, granite, marble, barite and mineral water, and so on.