The most common secondary minerals are Kaolinite (chemical weathering of Feldspar), Chlorite (weathering of Biotite, Pyroxene, and Amphibole), Sericite (weathering of feldspar), and Serpentine (hydrothermal modification of Olivine). You might find these chapters and articles relevant to this topic.

Secondary minerals, as the name suggests, are minerals that form as a result of the alteration or weathering of primary minerals. They are formed through various chemical reactions that occur when primary minerals come into contact with external agents such as …

…the magma; in contrast are secondary minerals, which form at a later time through processes such as weathering by hydrothermal alteration. Common minor accessory minerals include topaz, zircon, corundum, fluorite, garnet, monazite, rutile, magnetite, ilmenite, allanite, and tourmaline.

2023年11月19日 · While primary minerals provide foundational components to many rock types, secondary minerals can dominate certain rocks, like clay, which is primarily made up of secondary minerals resulting from the decomposition of other rock types.

2023年5月18日 · Secondary minerals, however, arise from the alteration of primary minerals. They develop through processes like weathering and hydrothermal alterations, where changes in temperature, pressure, or chemical environments transform the original minerals into new forms.

Secondary minerals form later by chemical or physical reaction within the rock. Often, such secondary reactions involve H 2 O or CO 2 and occur during weathering, diagenesis, or other low-temperature alteration of a preexisting rock.

Secondary Minerals: The secondary minerals are formed at the earth’s surface by weathering on the pre-existing primary minerals under variable conditions of temperature and pressure. During weathering, water accompanied by CO 2 from the atmosphere plays an important role in processes, like hydrolysis, hydration and solution.

2018年10月17日 · This chapter introduces secondary minerals such as clay minerals, hydroxides and oxides in soils. Clay minerals, which are major secondary minerals in soils, are phyllosilicates that have 1:1 or 2:1 type layers.

Secondary minerals are often derived from the weathering products of primary minerals. Examples of secondary minerals include clay, gypsum, and alunite. In summary: Primary minerals form during the initial crystallization of magma and are not formed in the soil.

Talc, a secondary mineral that forms when Mg-silicates such as olivine or pyroxene are altered, and pyrophyllite, an uncommon metamorphic mineral, are often grouped with the clays. Figures 7.22 and 7.23 show examples of each.