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| The world's primary reserves of gold and largest reserves of chromium and platinum are held by |
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Definition
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Term
| In recent years South Africa has been the principal producer of |
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Definition
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Term
| The "Merensky Reef' contains a very large proportion of the world's reserves of |
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Definition
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Term
| The principal use of chromium is as |
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Definition
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Term
| The world's largest reserves of gold |
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Definition
| The Witwatersrand district of South Africa |
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Term
| The largest use for silver today is |
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Definition
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Term
| The principal element in the continental crust is |
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Definition
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Term
| The percentage of gold in a 12 carat gold ring is |
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Definition
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Term
| If a gold-silver alloy ring is 16 carat, its purity is |
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Definition
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Term
| The world's largest chromium and major nickel deposits have formed through the process of |
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Definition
| gravitational settling in a large igneous intrusion |
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Term
| The world's largest gold deposit formed through the process of |
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Definition
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Term
| Bronze is an alloy composed primarily of |
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Definition
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Term
| Brass is an alloy composed primarily of |
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Definition
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Term
| Geochemically scarce metals are important because |
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Definition
their special properties led to
many of today's technologies |
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Term
| Chromium is a metal widely used for its properties as |
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Definition
| an alloying agent with iron |
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Term
| The Bushveld Igneous Complex is a source of |
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Definition
| chromium, vanadium and platinum |
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Term
| The richest and most important nickel ore bodies are |
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Definition
all sulfide ores formed by
magmatic segregation |
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Term
| Manganese nodules on the deep ocean floor are potential ores because |
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Definition
| they are enriched in copper, nickel and cobalt |
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Term
| The world's richest silver mining region has long been |
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Definition
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Term
| The metal used to make filaments in incandescent light bulbs is |
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Definition
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Term
| The largest flux of lead into the environment in the United States today is |
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Definition
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Term
| The world's largest nickel, cobalt, and chromium deposits occur in |
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Definition
| large basaltic intrusions |
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Term
| The two principal metals employed as alloying agents in the making of stainless steels today are |
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Definition
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Term
| The principal metal used in the preparation of the bronze of the Bronze Age was |
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Definition
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