GEOLOGY

Detailed explanation-1: -Uranium ore deposits are known to occur in igneous, sedimentary, and metamorphic rocks, and in many different types of rock within each of these classifications.

Detailed explanation-2: -Sedimentary Uranium Deposits Because uranium moves in solution under oxidizing conditions and drops out under reducing conditions, it tends to gather where oxygen is absent, such as in black shales and other rocks rich in organic material.

Detailed explanation-3: -In systems involving only the igneous rock itself (’orthomagmatic’ systems), uranium is concentrated in the magma as it evolves via fractional crystallisation (the removal of crystals from the magma as they form). Eventually, uranium-rich minerals (such as uraninite) may form when uranium saturation occurs.

Detailed explanation-4: -Thus, of the eight common igneous minerals, only quartz, K-feldspar, and muscovite are commonly seen in sedimentary rocks. These minerals are joined in sedimentary rocks by clay minerals, calcite, dolomite, gypsum, and halite. The clay minerals form during mineral weathering.