Lecture P-1 Earth Materials-I

Lecture P-1 Earth Materials-I - Earth Materials & Minerals...

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Earth Materials & Minerals The building blocks of rocks and powerful tools for the geologist. Tourmaline Aragonite
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Earth-a review
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Chemical Composition of Bulk Earth versus Crust # Element Symbol Total Weight % Crust % 1 Iron Fe 35 6 2 Oxygen O 30 46 3 Silicon Si 15 28 4 Magnesium Mg 13 4 5 Nickel Ni 2.4 <1 6 Sulfur S 1.9 <1 7 Calcium Ca 1.1 2.4 8 Aluminium Al 1.1 8 9 Others <1 <1 Red = increase, blue = decrease in crust
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Why Study Rocks and Minerals?? • Locate Resources - Geo-Business. • Behavior of Materials Making Up Crust - Geo-Engineer. • Minerals Record Geologic History – Geo-Detective. Cause They ` re Cool!
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One of the most famous diamonds is the Great Star of Africa, weighing 530.2 carats, which was cut from the world's largest rough diamond, the Cullinan I. The historic Cullinan diamond, found in South Africa in 1905, weighed an astounding 3,106.75 carats (621.35 g). www.diamondtutorials.com The Star of Africa Gem l Stones z Present value > $400 million
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Holtermann and the gold "nugget" (photo montage). Discovered at Hill End, New South Wales, Australia in 1872. The Holtermann Nugget remains the largest single mass of gold ever discovered in the world, measuring 1.5 m long and weighing 286 kg. Gold = ~150 million in US$ today
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Common Objects Made of Minerals… Soil - to grow food, lumber, and cotton Energy - fossil fuels and uranium Steel, aluminum, copper …all other metals Diamond, sulfur, fertilizers - all from non metals Glass, plaster, concrete, porcelain Plastic, rubber, nylon, solvents, chemicals, medicines Everything we enjoy comes from the Earth!!
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Weapons and warefare typiFed the early use of minerals. Different ages? Stone, Bronze, Iron, Copper, Silicon
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Jan Van Eyck ` s Ultramarine palagems.com Man in a Blue Turban. 1430-1433 Annunciation. 1434-1436 First uses in 6 th and 7 th century in Afghanistan
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Geologic Processes! Flow of magma in volcanic rocks. Flow of solid metamorphic rock.
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Garnet: An amazing tape recorder! Green “island” = 1 b.y. old garnet growth. White = 450 Ma garnet growth after earlier garnet cracked up. Red = 360 Ma garnet growth. Every time that Africa and North America collided this garnet grew and recorded the P-T conditions.
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Play Interesting Role in History: The Mystery of Bronze. Bronze age (3200-1200 B.C. in Mediterranean region). Bronze = 90% copper and 10% tin. Bronze stronger metal and thus revolutionized warfare and agriculture.
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This note was uploaded on 04/02/2012 for the course GEOL 105 taught by Professor Platt,davis during the Spring '08 term at USC.

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Lecture P-1 Earth Materials-I - Earth Materials & Minerals...

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