Handout 1: Generalized Geologic Map of the Area around Homestake MineMap modified after Figure 2 of USGS Special Paper 1717, Chapter M: Van Gosen, Bradley S. "The Life Cycle of Gold Deposits Near the NortheastCorner of Yellowstone National Park–Geology, Mining History, and Fate." (2007). (http://pubs.usgs.gov/pp/1717/downloads/pdf/p1717M.pdf)110°57'30"Scotch BonnetMountainFisherMountainHomestakemineHendersonMountain45°02'30"4000 feet1000 metersMetalic sulfide and gold depositsHigh-angle faults*50-40 Million Year old extrusive rocks and lava flowsDetachment faults*50-40 Million Year old intrusive rock formations50-40 Million Year old volcanic rock formationsContacts50-40 Million Year old volcanic pipes shattered during eruption*Faults=a break in rockSedimentary rocks and unconsolidated surface depositslayers. Fluids bearingminerals often travelalong faults>2,500 million years old igneous and metamorphic rocks Now look at the high-angle faults shown in the map. Faults often provide pathways for fluidsbearing metallic minerals. What is the spatial relationship between the high angle faults and themetallic sulfide and gold deposits?*consider "close" to mean within ~500 mThere is no pattern - sometimes the deposits are very far from high angle faults and other times they are prettyclose to themThe deposits are generally close to high angle faultsThe deposits are generally far from high angle faultsQuestion 51 ptsBased on this geologic map and your answer to the question above, what locations are reasonableplaces to look for similar deposits? (SELECT ALL)(Base your answer on whether the rocks that might house those deposits and/or faults that mightcarry the mineral-bearing fluids are present. Though, there are no known economic depositsmapped in these places, similarity in geology to other deposits generally warrants at least a closerlook.)Henderson MountainThe area east of the the Homestake MineThe area south of Scotch Bonnet MountainThe NW corner of the mapped area

Answered: Now look at the high-angle faults shown…

Applications and Investigations in Earth Science (9th Edition)

9th Edition

ISBN:9780134746241

Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa

Chapter1: The Study Of Minerals

Section: Chapter Questions

Problem 1LR

See similar textbooks

Related questions

Question

Handout 1: Generalized Geologic Map of the Area around Homestake Mine
Map modified after Figure 2 of USGS Special Paper 1717, Chapter M: Van Gosen, Bradley S. "The Life Cycle of Gold Deposits Near the Northeast
Corner of Yellowstone National Park–Geology, Mining History, and Fate." (2007). (http://pubs.usgs.gov/pp/1717/downloads/pdf/p1717M.pdf)
110°57'30"
Scotch Bonnet
Mountain
Fisher
Mountain
Homestake
mine
Henderson
Mountain
45°02'30"
4000 feet
1000 meters
Metalic sulfide and gold deposits
High-angle faults*
50-40 Million Year old extrusive rocks and lava flows
Detachment faults*
50-40 Million Year old intrusive rock formations
50-40 Million Year old volcanic rock formations
Contacts
50-40 Million Year old volcanic pipes shattered during eruption
*Faults=a break in rock
Sedimentary rocks and unconsolidated surface deposits
layers. Fluids bearing
minerals often travel
along faults
>2,500 million years old igneous and metamorphic rocks

Now look at the high-angle faults shown in the map. Faults often provide pathways for fluids
bearing metallic minerals. What is the spatial relationship between the high angle faults and the
metallic sulfide and gold deposits?
*consider "close" to mean within ~500 m
There is no pattern - sometimes the deposits are very far from high angle faults and other times they are pretty
close to them
The deposits are generally close to high angle faults
The deposits are generally far from high angle faults
Question 5
1 pts
Based on this geologic map and your answer to the question above, what locations are reasonable
places to look for similar deposits? (SELECT ALL)
(Base your answer on whether the rocks that might house those deposits and/or faults that might
carry the mineral-bearing fluids are present. Though, there are no known economic deposits
mapped in these places, similarity in geology to other deposits generally warrants at least a closer
look.)
Henderson Mountain
The area east of the the Homestake Mine
The area south of Scotch Bonnet Mountain
The NW corner of the mapped area

Expert Solution

Step 1

The hydrothermal ore deposits are the ones that are formed by the deposition of the minerals from hydrothermal solutions. The fluids take the path where it finds the openings present in the rock. The deposition of the minerals is thus done on such spaces by the hydrothermal fluids.