Geol 2312 igneous and metamorphic petrology
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Geol 2312 Igneous and Metamorphic Petrology. Lecture 1 Introduction to Igneous Petrology and Earth’s Physical and Chemical Structure. Jan. 20, 2009. The Realm of Igneous and Metamorphic Rocks.

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Geol 2312 Igneous and Metamorphic Petrology

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Geol 2312 igneous and metamorphic petrology

Geol 2312 Igneous and Metamorphic Petrology

Lecture 1

Introduction to Igneous Petrology and Earth’s Physical and Chemical Structure

Jan. 20, 2009


The realm of igneous and metamorphic rocks

The Realm of Igneous and Metamorphic Rocks

A Fundamental Dilemma to the Study of Igneous and Metamorphic Rocks and the Processes that Create Them

ACCESS


Igneous petrology

Igneous Petrology

“Study of Rocks formed by the Crystallization of Magma”

What do we want to know about magma?

What do we want to know about crystallization processes?

How do we study igneous rocks to address these questions?


Components of scientific study observations interpretations of the natural world

Components of Scientific “Study” Observations/Interpretations of the Natural World


Geol 2312 igneous and metamorphic petrology

Components of Scientific “Study” Observations/Interpretations of Experiments Simulating the Natural World

Crystallization Experiments

Melting

Experiments


Geol 2312 igneous and metamorphic petrology

Components of Scientific “Study” Observations/Interpretationsof Theoretical Models the of Natural World

Cobra MELTS Interface

Ghiorso & Sack (1995)


Geol 2312 igneous and metamorphic petrology

Physical and Chemical Structure of Earth


Pressure and thermal gradients

Pressure and Thermal Gradients

From Winter (2001)


Composition of the earth

Composition of the Earth

  • How Do We Know?

  • Mantle Xenoliths

  • Seismic Data

  • Density Constraints

  • Meteorites

    • stony ~mantle

    • iron ~core

    • chondrites ~whole earth


Geol 2312 igneous and metamorphic petrology

Plate Tectonics drives Two Stages of Crust-making

1. Mantle partially melts to make ocean crust

2. Ocean crust melts to make continental crust


Tectono magmatic environments

Tectono-magmatic environments

  • 5.Back-arc Basins

  • 6.Ocean Island Basalts

  • 7.Miscellaneous Intra-Continental Activity

    • kimberlites, carbonatites, anorthosites...

1.Mid-ocean Ridges

2.Intracontinental Rifts

3. Island Arcs

4.Active Continental

Margins


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