Mineral Evolution Database

Created and maintained by the Mineral Evolution Project in partnership with RRUFF and mindat.

Mineral locality data provided by mindat.org

The Mineral Evolution database is currently under development.

The goal of this page is to present localities at which the mineral is found, and estimates of the oldest possible geologic age of the minerals at these localities.

Locality Name:
Margerie Glacier Prospect (Margarie Glacier Prospect; Porcupine Prospect), Glacier Bay District, Juneau District, Hoonah-Angoon Census Area, Alaska, USA

Oldest recorded age at locality: 65.5
Youngest recorded age at locality: 2.6

mindat Locality ID: 198741
mindat URL: http://www.mindat.org/loc-198741.html

Tectonic Settings:

Total number of sublocalities beneath "Margerie Glacier Prospect (Margarie Glacier Prospect; Porcupine Prospect), Glacier Bay District, Juneau District, Hoonah-Angoon Census Area, Alaska, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 59°1'10"N
Longitude: 137°5'"W
Decimal Degree (lat, lon): 59.019444444444,-137.08333333333

A	This mineral is Anthropogenic.
G	This mineral is directly dated.
B	This mineral is reported as having this age.
Y	This mineral is using an age reported as an element mineralization period.
O	This mineral is using an age calculated from all data at the locality.
R	The age displayed for this mineral originates from a different, non-child locality.
P	The age displayed for this mineral is the range of ages for this mineral at all of this locality's children.
	This mineral's age has not yet been recorded.

Arsenopyrite	Chalcopyrite	Clay	Clinozoisite	Copper	Epidote	Mica	Molybdenite	Nickeline	None
Pyrite	Quartz	Scheelite	Sphalerite

This Mineral list contains entries from this locality, including sub-localities. Minerals in bold are reported by mindat.org as occurring directly at this locality, and do not occur at any children (sublocalities) of this locality.

Elements at this locality, including sub-localities: Al As Au Ca Cu Fe H K Mo O S Si W Zn

Elements from minerals reported directly at this locality: Al As Au Ca Cu Fe H K Mo O S Si W Zn

Structural Groups for minerals in this locality:
Arsenopyrite Chalcopyrite Clay Clinozoisite Copper Epidote Mica Molybdenite Nickeline None
Pyrite Quartz Scheelite Sphalerite

11 IMA Minerals at location:

Arsenopyrite ()*	Chalcopyrite ()*	Epidote ()*	Gold ()*	Molybdenite ()*
Muscovite ()*	Pyrite ()*	Pyrrhotite ()*	Quartz ()*	Scheelite ()*
Sphalerite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Arsenopyrite ()*	Arsenopyrite	FeAsS	65.5	2.6	9052
Chalcopyrite ()*	Chalcopyrite	CuFeS₂	65.5	2.6	27198
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	65.5	2.6	8173
Gold ()*	Copper	Au	65.5	2.6	30554
Molybdenite ()*	Molybdenite	MoS₂	65.5	2.6	5800
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	65.5	2.6	17380
Pyrite ()*	Pyrite	FeS₂	65.5	2.6	39462
Pyrrhotite ()*	Nickeline	Fe₇S₈	65.5	2.6	9056
Quartz ()*	Quartz	SiO₂	65.5	2.6	61156
Scheelite ()*	Scheelite	Ca(WO₄)	65.5	2.6	4894
Sphalerite ()*	Sphalerite	ZnS	65.5	2.6	21482

1 Ages assigned to this locality:

	Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Prioritized?	Sample Source	Sample Num	Run Num	Age from other Locality	Dated Mineral	Minerals explicitely stated as having this age	Age applies to these Elements	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
	PorphCu-00237	65.5	2.6	Tertiary									Arsenopyrite, Chalcopyrite, Epidote, Molybdenite, Pyrite, Pyrrhotite, Scheelite, Sphalerite	Cu	198741	Margerie Glacier Prospect (Margarie Glacier Prospect; Porcupine Prospect), Glacier Bay District, Juneau District, Hoonah-Angoon Census Area, Alaska, USA	Margerie Glacier	Singer et al. (2008)		USGSOFR2008_1155

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...