Earth's Internal Heat and Magmatism PDF

EXOGENIC PROCESSES 1 ▪ IDENTIFY INTERNAL HEAT SOURCE ▪ EXPLAIN MAGMA FORMATION. ▪ IDENTIFY SITES OF MAGMA FORMATION  EARTH’S INTERNAL HEAT AND MAGMATISM  PRIMORDIAL HEAT “heat imparted to a planetary body by the processes of its formation and...

EXOGENIC PROCESSES 1 ▪ IDENTIFY INTERNAL HEAT SOURCE ▪ EXPLAIN MAGMA FORMATION. ▪ IDENTIFY SITES OF MAGMA FORMATION  EARTH’S INTERNAL HEAT AND MAGMATISM  PRIMORDIAL HEAT “heat imparted to a planetary body by the processes of its formation and differentiation” RADIOACTIVE HEAT “refers to the energy dissipated in the interiors of planets, satellites, or asteroids as a consequence of the radioactive decay of radioactive isotopes” EARTH’S INTERNAL HEAT AND MAGMATISM 5 WHAT ARE THE SOURCES OF HEAT TRANSFER? EARTH’S INTERNAL HEAT AND MAGMATISM 6 SOURCES OF HEAT TRANSFER CONDUCTION CONVECTION RADIATION Heat is transmitted Heat is transmitted Heat exchange through collisions by the movement of between the sun and between mass the Earth. neighboring atoms More efficient heat or molecules transfer EARTH’S INTERNAL HEAT AND MAGMATISM 7 WHAT IS MAGMATISM?  MAGMATISM “happen in the lowest part of the Earth’s crust and in the portion of the mantle, known as asthenosphere”  PARTIAL MELTING “different minerals in rock melt at different temperature and pressure.” EARTH’S INTERNAL HEAT AND MAGMATISM 10 TYPES OF MELTING HEAT TRANSFER DECOMPRESSION FLUX MELTING MELTING MELTING Melting through an Melting through an Melting through a addition of volatiles increase in decrease of pressure (water/carbon temperature due to due to convection dioxide). transfer of heat current. (conduction) EARTH’S INTERNAL HEAT AND MAGMATISM 11