NASC 130 Essentials3_ch12

Tin and iron best preserved in fossil best stream

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Unformatted text preview: by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Mineral Production Open-pit mines – large excavations open to the air. Less expensive and dangerous than tunnel mines Usually require ore within Usually 100 m of the land surface Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Mineral Production Underground mines - ore obtained by tunneling Tunnels are linked to a vertical shaft (an adit) Tunnels adit Ore is removed by drilling and blasting Excavated ore is hauled to the surface for processing Expensive and dangerous Expensive 3-D model Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Non-Metallic Resources Materials that lack metals are used by humans Dimension stone – rock slabs used as building material Dimension Crushed stone – material for roads, asphalt and concrete Cement – mixture of heated limestone, quartz and clay Cement Essentials of Geology, 3rd edition, by Stephen Marshak Chapter 12: Riches in Rock: Energy & Mineral Resources Non-Metallic Resources Non-metallic minerals commonly used in homes Calcite – base material of cement (concrete) Clay minerals – used for bricks, pottery, dishware Clay Gypsum – most common material in wallboard or plaster Quartz – used to make window glass Quartz U.S. per capita non-metallic mineral use is huge Essentials of Geology, 3rd edition, by Stephen Mar...
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