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:
Dukes Co., Massachusetts, USA

mindat Locality ID: 206501
mindat URL: http://www.mindat.org/loc-206501.html

Tectonic Settings:

Total number of sublocalities beneath "Dukes Co., Massachusetts, USA": 8
Total number of bottom-level sublocalities: 4

Number of Child Localities: 2
Child Localities:
Gosnold (Elizabeth Islands)
Martha's Vineyard

Latitude: 41°24'13"N
Longitude: 70°46'27"W
Decimal Degree (lat, lon): 41.403611111111,-70.774166666667

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.

Calcite	Copper	Corundum	Gypsum	Marcasite	None	Pyrite	Quartz	Spinel	Staurolite

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 Au C Ca Cu Fe H O S Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Calcite Copper Corundum Gypsum Marcasite None Pyrite Quartz Spinel Staurolite

12 IMA Minerals at location:

Copper ()*	Corundum ()*	Gold ()*	Gypsum ()*	Ilmenite ()*
Maghemite ()*	Magnetite ()*	Marcasite ()*	Pyrite ()*	Quartz ()*
Siderite ()*	Staurolite ()*

Mineral name	Structural Groups	IMA Formula	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Copper ()*	Copper	Cu	1	219296	3846
Corundum ()*	Corundum	Al₂O₃	1	219296	1797
Gold ()*	Copper	Au	1	219296	30554
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	1	219294	6890
Ilmenite ()*	Corundum	Fe²⁺Ti⁴⁺O₃	1	219296	5433
Maghemite ()*	Spinel	(Fe³⁺_0.67 _0.33)Fe³⁺₂O₄	1	219296	229
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	1	219296	14899
Marcasite ()*	Marcasite	FeS₂	1	219294	5674
Pyrite ()*	Pyrite	FeS₂	1	219294	39462
Quartz ()*	Quartz	SiO₂	1	219296	61156
Siderite ()*	Calcite	Fe(CO₃)	2	219291,219294	6417
Staurolite ()*	Staurolite	Fe²⁺₂Al₉Si₄O₂₃(OH)	1	219296	978

No ages have been assigned to this locality yet.

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...