Which mineral would you expect to see in the metamorphic aureole closest to a moderately deeply buried (~5km depth) large igneous intrusion?Group of answer choicesandalusitekyaniteserpentinesillimanitetalc

The mineral you would expect to see in the metamorphic aureole closest to a moderately deeply buried (~5km depth) large igneous intrusion is sillimanite.

Here's why:

1. Metamorphic aureoles are zones of metamorphic rock that form around an igneous intrusion due to the heat and pressure from the intrusion.

2. The type of mineral that forms in these aureoles depends on the temperature and pressure conditions.

3. Andalusite, kyanite, and sillimanite are all polymorphs of Al2SiO5, meaning they have the same chemical composition but different crystal structures. They form under different pressure-temperature conditions during metamorphism.

4. Andalusite forms at relatively low pressure and temperature conditions, kyanite forms at high pressure and moderate temperature conditions, and sillimanite forms at high temperature and moderate to high pressure conditions.

5. Given that the igneous intrusion is moderately deeply buried (~5km depth), the pressure and temperature conditions would be relatively high.

6. Therefore, of the minerals listed, sillimanite would be the most likely to form in the metamorphic aureole closest to the intrusion.

Serpentine and talc are typically associated with low-grade metamorphism and would not be expected in this scenario.