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MNE 210 Exam Questions and Answers Rated 100%

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MNE 210 Exam Questions and Answers Rated 100% (T/F) Kimberlites are emplaced by a rapid intrusive advance from great depth (up to150 km). Just below the surface, high pressure builds up as the magma encountersground water and degasifies; this pressure builds up until an explosion blows out ofthe...

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MNE 210 Exam Questions and Answers Rated 100%

(T/F) Kimberlites are emplaced by a rapid intrusive advance from great depth (up to150 km). Just below
the surface, high pressure builds up as the magma encountersground water and degasifies; this pressure
builds up until an explosion blows out ofthe surface material. Kimberlite pipes are shaped like carrots.
(1pts) - Answers True

Name 2 Things that can affect the color of a gem stone - Answers trace element impurities

heat

special conditions of formations

(T/F) The value of gems derives from their unique and strong colors, their rarity(except diamonds), and
their ability to be cut into shapes that reflect light. (1pts) - Answers True

(T/F) Van der Waals forces are responsible for geckos being able to walk on glass.(1pts) - Answers True

What geologic structure is the major source of platinum in South Africa? - Answers Layered Mafic-
Ultramafic Intrusions

Bushveld Complex

What commodity is mined a Banded Iron Formation deposit - Answers Iron

What is the leading theory for how BIF's formed - Answers Algoma- from submarine volcanoes

Superior-can have, but not necessarily, some volcanic input w/ most or all the ore derived from chemical
sediments precipitated from seawater

What is the age of most BIF's - Answers 4-.5 Billions Years Ago

(T/F) Mississippi Type Deposits are found along the margins of major sedimentary basins within mid-
continent areas that have very gentle dips. The ore has been deposited in open spaces in breccias, in
enlarged joints and fractures. - Answers True

What type of economic minerals would you mine in a MVT deposit - Answers Galena

Sphalerite

Barite

Fluorite

Order of Precipitate Minerals. What type of Deposits would contain these minerals? - Answers 1. Calcite

2. Gypsum or Anhydrite (if T and S are higher)

3. Halite

, 4. Sylvite

Evaporites

What are the likely host rocks for the mineralization in a MVT deposit - Answers Carbonates

Dolomite

Jasperoid

Breccias

Where in the world would you explore for porphyry copper deposits and Why? - Answers Subduction
Zones (such as Arizona)

That is where they form

(T/F) Kimberlites are found from the Precambrian into the Cenozoic period (1,600 to55 Ma) along
continental margins - Answers False

Found in stable parts of continents

Name 2 types of deposits that provide ingredients for fertilizer - Answers Phosphates: Phosphorite

Evaporites

What physical properties does a mineral hare to have to be found in a placer deposit? - Answers high
specific gravity

durable

not weathered

Does a sand and gravel mine have a high intrinsic or high place value, why? - Answers High Place Value

Describe the emplacement mechanisms for LMI deposits - Answers Magmatic ore deposits are derived
from accumulations of crystals of metallic oxides, or immiscible sulfide, or oxide liquids that formed
during the cooling and crystallization of magma

With epithermal deposits having such a high grade, why aren't they mined more often or looked at for
exploration targets? - Answers Usually to small and complicated to mine economically

Malachite - Answers Fizzes, Green, Mamillary



CU2 (CO3)(OH)2

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