Practice Part 1 Two prospectors and competitors have been exploring for gold in the area of Dismal Flats. Much to one co
Posted: Wed May 18, 2022 4:07 pm
Practice Part 1
Two prospectors and competitors have been exploring for
gold in the area of Dismal Flats. Much to one competitor's dismay,
the other competitor has recently discovered a major ore shoot and
has opened a profitable mine.
However, the first competitor has learned that the
highest-grade ore is located at the intersection of a major quartz
vein and the upper contact of the Merion Sandstone. She produced
the attached sketch
map of the Dismal Flats area. She then staked the only
available claim in the area that included the upper
Merion contact. Unfortunately the quartz vein was not
exposed in the claim.
In order to recover some of her losses, she has decided
to sell her claim. She has assured a
potential buyer that gold is "just below the
surface".
You have been hired to evaluate the claim. Is there gold
beneath the surface and if so, where and at what depth is the
ore?
{This is an example of a common type of fault problem,
called a "lost vein problem" (you saw one
previously). A vein is present on one side of a fault,
but because of limited exposure, its location is
unknown on the other side. To solve this sort of
problem, first determine the net slip on the fault.
Then, plot the vein on you fault plane view and
determine the location of its missing half, also on the fault plane
view. You now know the location of the vein at the ground surface.
Plot the missing vein on the sketch map. Is the vein-contact
intersection beneath the claim? If so, how deep is
it?}
your answer must include:
1.explain your analysis and solution, including a
description of movement on the fault (orientation
of net slip vector and relative motion)
a. a map showing the location of the vein in the
northern half of the map area
b. a fault plane section showing how you located the
missing vein
C. Excel sheet used to construct the fault plane
section
D. a cross section showing depth to vein/sandstone
intersection relative to area of claim
2 top of Merion Sandstone 325 Claimed area Basalt dike 36 32 1 270 32 61 quartz vein Basalt dike Owned mine N 36 Dismal Flats Area top of Merion Sandstone 1000 ft
- Practice Part 1 Two Prospectors And Competitors Have Been Exploring For Gold In The Area Of Dismal Flats Much To One Co 1 (43.15 KiB) Viewed 51 times
gold in the area of Dismal Flats. Much to one competitor's dismay,
the other competitor has recently discovered a major ore shoot and
has opened a profitable mine.
However, the first competitor has learned that the
highest-grade ore is located at the intersection of a major quartz
vein and the upper contact of the Merion Sandstone. She produced
the attached sketch
map of the Dismal Flats area. She then staked the only
available claim in the area that included the upper
Merion contact. Unfortunately the quartz vein was not
exposed in the claim.
In order to recover some of her losses, she has decided
to sell her claim. She has assured a
potential buyer that gold is "just below the
surface".
You have been hired to evaluate the claim. Is there gold
beneath the surface and if so, where and at what depth is the
ore?
{This is an example of a common type of fault problem,
called a "lost vein problem" (you saw one
previously). A vein is present on one side of a fault,
but because of limited exposure, its location is
unknown on the other side. To solve this sort of
problem, first determine the net slip on the fault.
Then, plot the vein on you fault plane view and
determine the location of its missing half, also on the fault plane
view. You now know the location of the vein at the ground surface.
Plot the missing vein on the sketch map. Is the vein-contact
intersection beneath the claim? If so, how deep is
it?}
your answer must include:
1.explain your analysis and solution, including a
description of movement on the fault (orientation
of net slip vector and relative motion)
a. a map showing the location of the vein in the
northern half of the map area
b. a fault plane section showing how you located the
missing vein
C. Excel sheet used to construct the fault plane
section
D. a cross section showing depth to vein/sandstone
intersection relative to area of claim
2 top of Merion Sandstone 325 Claimed area Basalt dike 36 32 1 270 32 61 quartz vein Basalt dike Owned mine N 36 Dismal Flats Area top of Merion Sandstone 1000 ft