Shared Flashcard Set

Details

Chapter 8, The Geochemically Scarce Metals
Resources of the Earth
24
Other
Undergraduate 2
11/22/2009

Additional Other Flashcards

 


 

Cards

Term
The world's primary reserves of gold and largest reserves of chromium and platinum are held by
Definition
South Africa
Term
In recent years South Africa has been the principal producer of
Definition
gold
Term
The "Merensky Reef' contains a very large proportion of the world's reserves of
Definition
platinum
Term
The principal use of chromium is as
Definition
a steel alloying agent
Term
The world's largest reserves of gold
Definition
The Witwatersrand district of South Africa
Term
The largest use for silver today is
Definition
photography
Term
The principal element in the continental crust is
Definition
oxygen
Term
The percentage of gold in a 12 carat gold ring is
Definition
50%
Term
If a gold-silver alloy ring is 16 carat, its purity is
Definition
67%
Term
The world's largest chromium and major nickel deposits have formed through the process of
Definition
gravitational settling in a large igneous intrusion
Term
The world's largest gold deposit formed through the process of
Definition
placer accumulation
Term
Bronze is an alloy composed primarily of
Definition
Copper & tin
Term
Brass is an alloy composed primarily of
Definition
copper & zinc
Term
Geochemically scarce metals are important because
Definition
their special properties led to
many of today's technologies
Term
Chromium is a metal widely used for its properties as
Definition
an alloying agent with iron
Term
The Bushveld Igneous Complex is a source of
Definition
chromium, vanadium and platinum
Term
The richest and most important nickel ore bodies are
Definition
all sulfide ores formed by
magmatic segregation
Term
Manganese nodules on the deep ocean floor are potential ores because
Definition
they are enriched in copper, nickel and cobalt
Term
The world's richest silver mining region has long been
Definition
North and South America
Term
The metal used to make filaments in incandescent light bulbs is
Definition
tungsten
Term
The largest flux of lead into the environment in the United States today is
Definition
ammunition
Term
The world's largest nickel, cobalt, and chromium deposits occur in
Definition
large basaltic intrusions
Term
The two principal metals employed as alloying agents in the making of stainless steels today are
Definition
chromium and nickel
Term
The principal metal used in the preparation of the bronze of the Bronze Age was
Definition
copper
Supporting users have an ad free experience!