Margerie

Prospect in Alaska, United States with commodities Cobalt, Copper, Gold, Silver, Tungsten, Molybdenum, Zinc, Arsenic, Barium-Barite, Bismuth

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Commodities
Materials information
Alteration
Mineral occurrence model information
Host and associated rocks
Nearby scientific data
Economic information about the deposit and operations
Mining district
Reserves and resources
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10309002
MRDS ID	A013114
Record type	Site
Current site name	Margerie
Alternate or previous names	Margarie Glacier, Margerie Copper-Gold Prospect, Leo Mark Anthony, Moneta Porcupine Mines, Moneta Porcupine, Moneta Porcupine Co., Margerie Nos. 1-6, Tarr Inlet, Margerie Glacier Porphyry-Copper, Margerie Glacier Porphyry Copper Deposit

Geographic coordinates

Geographic coordinates:	-137.09213, 59.00972 (WGS84)
Relative position	This prospect is in Glacier Bay National Monument on the south side of the Margerie Glacier between elevations of 1,100 feet and 3,200 feet. It is about 2 miles from tidewater on the west side of Tarr Inlet in the NW1/4, section 16, T. 33 S., R. 50 E. of the Copper River Meridian. It is shown as location 7 in figure C-2 and in figure C-39 of Brew and others (1978); as location 1 by Cobb (1972; MF-424); and as location SE24 by Nokleberg and others (1987).

Geographic coordinates:

-137.09213, 59.00972 (WGS84)

Relative position

This prospect is in Glacier Bay National Monument on the south side of the Margerie Glacier between elevations of 1,100 feet and 3,200 feet. It is about 2 miles from tidewater on the west side of Tarr Inlet in the NW1/4, section 16, T. 33 S., R. 50 E. of the Copper River Meridian. It is shown as location 7 in figure C-2 and in figure C-39 of Brew and others (1978); as location 1 by Cobb (1972; MF-424); and as location SE24 by Nokleberg and others (1987).

Site location context

Political divisions (FIPS codes)

Hoonah-Angoon(Census area)

Alaska(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Skagway A-6(quadrangle 1:63,360 scale)

Skagway SW(quadrangle 1:100,000 scale)

Skagway(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Glacier Bay(hydrologic unit)

Northern Southeast Alaska(hydrologic accounting unit)

Southeast Alaska(hydrologic subregion)

Alaska(hydrologic region)

Federal lands

Glacier Bay National Park(National Park)

National Park NPS(Type of land area)

NPS(Federal land areas administered by NPS)

Geographic areas

Country	State
United States	Alaska

Commodities

Commodity	Importance
Cobalt Critical	Primary
Copper	Primary
Gold	Primary
Silver	Primary
Tungsten Critical	Primary
Molybdenum	Secondary
Zinc Critical	Secondary
Arsenic Critical	Tertiary
Barium-Barite Critical	Tertiary
Bismuth Critical	Tertiary

Materials information

Materials	Type of material
Arsenopyrite	Ore
Chalcopyrite	Ore
Gold	Ore
Molybdenite	Ore
Sphalerite	Ore
Pyrite	Gangue
Pyrrhotite	Gangue
Quartz	Gangue

Alteration

Plagioclase has been subjected to moderate sericitization and K-spar alteration, and biotite has been moderately chloritized (Brew and others, 1978).

Mineral occurrence model information

Model code	54
USGS model code	17
Deposit model name	Porphyry Cu (North America)
Mark3 model number	81
Model code	53
USGS model code	17
Deposit model name	Porphyry Cu
Mark3 model number	4

Host and associated rocks

Host or associated Host

Rock type Sedimentary Rock > Carbonate > Limestone
Host or associated Host

Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite

Host or associated	Host
Rock type	Sedimentary Rock > Carbonate > Limestone

Host or associated	Host
Rock type	Plutonic Rock > Mafic Intrusive Rock > Diorite

Nearby scientific data

(1)	-137.09213, 59.00972	ListMap

Economic information

Comments on the geologic information

Geologic Description = The following description is summarized from Brew and others (1978). The Margerie prospect is a porphyry copper deposit. Disseminated chalcopyrite, pyrite, pyrrhotite, and powellite-scheelite occur in a massive porphyritic, Tertiary quartz monzodiorite stock and associated dikes. The stock contains a porphyritic quartz monzonite core. A prominent joint set that trends N50E and dips steeply to the northwest cuts across the stock and extends into the surrounding Permian section of hornfelsed marine volcanic and sedimentary rocks. Porphyritic monzodiorite dikes up to 50 feet thick and quartz-sulfide veins up to 1.7 feet thick occupy the joint set. The dikes extend into the country rock but the veins do not. The veins, which are less important than disseminated mineralization, contain quartz, chalcopyrite, arsenopyrite, sphalerite, pyrite, pyrrhotite, powellite-scheelite, and molybdenite. Disseminated sulfide mineralization, primarily chalcopyrite, pyrite, pyrrhotite, and some powellite-scheelite, is largely confined to the stock and dikes. Where dikes extend into the surrounding marine sedimentary rocks, they contain much less disseminated sulfides. The joint system may have acted as the conduit for sulfide mineralization that replaced mafic minerals in the intrusive rocks. Plagioclase has been subjected to slight to moderate sericitization and K-spar alteration and biotite has been moderately chloritized. Limited investigation of the marine sedimentary rock section northeast of the stock did not reveal significant mineralization. However, the Permian marine volcanic and sedimentary rocks to the southwest of the stock contained various iron-stained zones, fault and fracture fillings of quartz and sulfides, and lenses of massive pyrite, pyrrhotite, and chalcopyrite. The Margerie prospect is within the Tarr Inlet suture zone, which forms the western boundary of the Geike province of Brew and others (1978). Based on the age of the host stock and dikes, the mineralization is Tertiary.
Age = Tertiary (Brew and others, 1978).

Economic information about the deposit and operations

Development status	Prospect
Commodity type	Metallic
Significant	Yes
Discovery year	1960
Discoverer	Leo Mark Anthony

Comments on exploration

Status = Probably inactive

Mining district

District name	Juneau (Glacier Bay subdistrict)

Reserves and resources

Type

In-situ

Estimate year

1978

Inferred

145000000mt ore

Total resources

145000000mt ore

Commodity	Grade	units	Group	Importance	Year
Tungsten	0.01	wt-pct	Tungsten	Primary	1978
Silver	4.5	g/mt	Silver	Primary	1978
Copper	0.2	wt-pct	Copper	Primary	1978
Gold	0.27	g/mt	Gold	Primary	1978

Type

In-situ

Estimate year

1978

Inferred

68000mt ore

Total resources

68000mt ore

Commodity	Grade	units	Group	Importance	Year
Silver	13.6999	g/mt	Silver	Primary	1978
Copper	0.5	wt-pct	Copper	Primary	1978
Gold	1.7	g/mt	Gold	Primary	1978

Comments on the reserve resource information

Reserves = As part of the mineral resources study of the Glacier Bay National Monument by Brew and others (1978), the U.S. Bureau of Mines estimated the deposit to contain 160 million tons of inferred resource that contain 0.2% copper, 0.008 ounces of gold per ton, 0.13 ounces of silver per ton, and 0.01% tungsten.

Comments on the workings information

Workings / Exploration = Brew and others (1978) cite the following sequence of activity at the Margerie prospect. The prospect was discovered by Leo Mark Anthony in 1960 and 6 claims were staked that year. Investigations were made by E. M. MacKevett of the USGS in 1966, George Moerlein in 1968 and the U.S. Bureau of Mines in 1975 and 1976. A Masters thesis by M. A. Parke was in preparation in 1978.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Alaska Resource Data File	ARDF	SK020
USGS	Mineral Resources Data System	MRDS	A013114
USGS	Mineral Resources Data System	MRDS	D002752
U.S. Bureau of Mines	Minerals Availability System	MAS	0021090002
USGS	Mineral Resources Data System	MRDS	10002213	Margerie Copper-Gold Prospect merged with this record (dep_id 10309002).
USGS	Mineral Resources Data System	MRDS	10009662	Margerie merged with this record (dep_id 10309002).
USGS	Mineral Resources Data System	MRDS	10282511	Margerie merged with this record (dep_id 10309002).

Bibliographic references

Reserve-Resource

Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.
Ownership

Alaska Kardex 109-057
Deposit

MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000.
Deposit

Cobb, E.H., 1972, Metallic mineral resources map of the Skagway quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-424, 1 sheet, scale 1:250,000.
Deposit

Anthony, L.M., 1977, unpublished maps and notes on investigations in Glacier Bay, 1958-1960: (Unpublished material available at the Juneau Mineral Information Center, U.S. Bureau of Land Management, Juneau, Alaska).
Deposit

Hollister, V.F., Anzalone, S.A., and Richter, D.H., 1975, Porphyry copper belts of southern Alaska and contiguous Yukon Territory: Canadian Mining and Metallurgical Bulletin, v. 68, no. 756, p. 104-112.
Deposit

Cobb, E.H., 1981, Summaries of data and lists of references to metallic and selected nonmetallic mineral occurrences in the Skagway quadrangle, Alaska, Supplement to Open-File Report 78-316, Part A in Summaries of data to January 1, 1980: U.S. Geological Survey Open-File Report 81-82-A, 11 p.
Deposit

Berg, H.C., 1984, Regional geologic summary, metallogenesis, and mineral resources of southeastern Alaska: U.S. Geological Survey Open-file Report 84-572, 298 p., 1 plate, scale approx. 1:600,000.
Deposit

Nokleberg, W.J., Bundtzen, T.K., Berg, H.C., Brew, D.A., Grybeck, D.J., Robinson, M.S., Smith, T.E., and Yeend, W., 1987, Significant metalliferous lode deposits and placer districts of Alaska: U.S. Geological Survey Bulletin 1786, 104 p.
Deposit

Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section B, Glacier Bay subarea: U.S. Bureau of Mines of Mines Special Publication, 69 p.
Deposit

Cobb, E.H., 1975, Tungsten occurrences in Alaska, U.S. Geological Survey Mineral Investigations Resource Maps MR-66.
Deposit

MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1967, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Open File Report: Technical Data Unit classification number 280, 176 p., 38 sheets. (Superseded by OFR 67-151)
Deposit

U.S. Geological Survey Staff, 1972, Geological survey research 1972; Chapter C: U.S. Geological Survey Professional Paper 800-C, p. B1-B281.
Deposit

Carter, Claire, ed., 1974, United States Geological Survey Alaska Program, 1974: U.S. Geological Survey Circular 700, 63 p.
Deposit

Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mt. Fairweather and Skagway quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-316, 127 p.
Deposit

Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Skagway Quadrangle, Alaska, supplement to Open-file report 78-316; Part B, Lists of references to January 1, 1980: U.S. Geological Survey Open-File Report 81-82-B, 9 p.
Deposit

Berg, H.C., Decker, J.E., and Abramson, B.S., 1981, Metallic mineral deposits of southeastern Alaska: U.S. Geological Survey Open-File Report 81-122, 136 p., 1 sheet, scale 1:1,000,000.
Deposit

McGee, D.L., 1974, Glacier Bay National Monument evaluation of mineral deposits: Alaska Division of Geological & Geophysical Surveys Alaska Open-File Report 47, 17 p., 1 sheet, scale 1:250,000.
Deposit

MTA 82 No. F-6
Deposit

Cobb, E.H., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Skagway quadrangle, Alaska; Supplement to Open-File Report 78-316; Part A, Summaries of data to January 1, 1980: U.S. Geological Survey Open-File Report 81-82-A, 11 p.
Deposit

MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1967, Mineral resources of Glacier Bay National Monument, Alaska: U. S. Geological Survey Open-File Report 151, 176 p.
Deposit

Moerlein, G.A., 1968, Geology and drilling results, Nunatak molybdenum prospect, Walper property, southeastern Alaska: Unpublished report available at U.S. Bureau of Land Management Library at Juneau, Alaska.

Comments on the references

Primary Reference = Brew and others, 1978

General comments

Subject category	Comment text
Deposit	Model Name = Copper porphyry with associated veins, pods, and disseminations (Cox and Singer, 1986; model 17).
Deposit	Other Comments = The deposit is within Glacier Bay National Park and Preserve where exploration and development is restricted.

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-APR-77	Elliott, James E.	U.S. Geological Survey
Reporter	01-MAR-87	Leonard, Kenneth R. (Huber, Donald F.)	U.S. Geological Survey
Editor	02-SEP-94	Mosier, Dan	U.S. Geological Survey	Parsed out host rock and associated rock types, ages, unit names, and unit ages.
Reporter	18-JUL-95	WLG	U.S. Bureau of Mines
Reporter	04-FEB-01	T.C. Crafford	T. Crafford & Associates

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

Maps centered on this site

Authoritative Alaska resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.

Margerie

Geologic information

Identification information

Geographic coordinates

Site location context

Geographic areas

Commodities

Materials information

Alteration

Mineral occurrence model information

Host and associated rocks

Nearby scientific data

Economic information

Comments on the geologic information

Economic information about the deposit and operations

Comments on exploration

Mining district

Reserves and resources

Comments on the reserve resource information

Comments on the workings information

Reference information

Links to other databases

Bibliographic references

Reserve-Resource

Ownership

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Deposit

Comments on the references

General comments

Reporter information

Beyond USGS

Maps centered on this site

Authoritative Alaska resources