* Silicate minerals: These are the most abundant components, making up about 90% of the mantle's composition. The most common silicate minerals are olivine and pyroxene.

* Iron: Iron is a significant component, making up about 5-10% of the mantle's composition.

* Magnesium: Magnesium is another important element, contributing about 3-5% to the mantle's composition.

* Calcium: Calcium is present in smaller amounts, contributing about 2-3% to the mantle's composition.

* Aluminum: Aluminum is also found in the mantle, contributing about 1-2% to its composition.

In addition to these major elements, the mantle also contains trace amounts of other elements like nickel, potassium, sodium, and others.

Important Notes:

* The composition of the mantle varies slightly with depth. The upper mantle is primarily composed of peridotite, which is a rock rich in olivine and pyroxene. The lower mantle is more likely to contain denser minerals like bridgmanite and ferropericlase.

* The mantle is not a solid, uniform mass. It behaves like a very viscous fluid over long periods, allowing for plate tectonics.

Overall, the Earth's mantle is a complex and dynamic region that plays a crucial role in shaping our planet's geology and evolution.