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:
General Thomas Mine, Lone Mountain District, Esmeralda Co., Nevada, USA

Oldest recorded age at locality: 116
Youngest recorded age at locality: 14.4

mindat Locality ID: 18941
mindat URL: http://www.mindat.org/loc-18941.html

Tectonic Settings:

Total number of sublocalities beneath "General Thomas Mine, Lone Mountain District, Esmeralda Co., Nevada, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 37°56'29"N
Longitude: 117°24'50"W
Decimal Degree (lat, lon): 37.941388888889,-117.41388888889

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.

Allophane	Aragonite	Calcite	Gypsum	Malachite	None	Not in a structural group	Pyrite	Rocksalt

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 C Ca Cu Fe H O Pb S Si Zn

Elements from minerals reported directly at this locality: Al C Ca Cu Fe H O Pb S Si Zn

Structural Groups for minerals in this locality:
Allophane Aragonite Calcite Gypsum Malachite None Not in a structural group Pyrite Rocksalt

12 IMA Minerals at location:

Aurichalcite ()*	Azurite ()*	Calcite ()*	Cerussite ()*	Chrysocolla ()*
Galena ()*	Gypsum ()*	Hemimorphite ()*	Hydrozincite ()*	Malachite ()*
Pyrite ()*	Rosasite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Aurichalcite ()*	None	(Zn,Cu)₅(CO₃)₂(OH)₆	116	14.4	919
Azurite ()*	Not in a structural group	Cu₃(CO₃)₂(OH)₂	116	14.4	5509
Calcite ()*	Calcite	Ca(CO₃)	116	14.4	27770
Cerussite ()*	Aragonite	Pb(CO₃)	116	14.4	4979
Chrysocolla ()*	Allophane	(Cu_2-xAl_x)H_2-xSi₂O₅(OH)₄·nH₂O	116	14.4	3531
Galena ()*	Rocksalt	PbS	116	14.4	24243
Gypsum ()*	Gypsum	Ca(SO₄)·2H₂O	116	14.4	6890
Hemimorphite ()*	Not in a structural group	Zn₄(Si₂O₇)(OH)₂·H₂O	116	14.4	1689
Hydrozincite ()*	None	Zn₅(CO₃)₂(OH)₆	116	14.4	1066
Malachite ()*	Malachite	Cu₂(CO₃)(OH)₂	116	14.4	12537
Pyrite ()*	Pyrite	FeS₂	116	14.4	39462
Rosasite ()*	Malachite	CuZn(CO₃)(OH)₂	116	14.4	454

5 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	Sample Num	Age from other Locality	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference ID
Kristen000182	72.5	69.7	71.1±1.4	K-Ar		muscovite	SPR-1	Yes	Muscovite	36708	Lone Mountain District, Esmeralda Co., Nevada, USA	Lone Mountain Area	Silberman et al. (1978)	USGSOFR78-841
Kristen000183	70.6	67.8	69.2±1.4	K-Ar		biotite	SPR-1A	Yes		36708	Lone Mountain District, Esmeralda Co., Nevada, USA	Lone Mountain Area	Silberman et al. (1978)	USGSOFR78-841
Kristen000184	116	110	113±3	K-Ar		hornblende	GB-1	Yes		36708	Lone Mountain District, Esmeralda Co., Nevada, USA	Lone Mountain Area	Silberman et al. (1978)	USGSOFR78-841
Kristen000185	25.3	18.9	22.1±3.2	fission track		zircon	GRP-1	Yes	Zircon	36708	Lone Mountain District, Esmeralda Co., Nevada, USA	Lone Mountain Area	Silberman et al. (1978)	USGSOFR78-841
Kristen000186	15	14.4	14.7±0.3	K-Ar	hydrothermal alteration age	sanidine	Miller-1	Yes	Sanidine	36708	Lone Mountain District, Esmeralda Co., Nevada, USA	Lone Mountain Area	Silberman et al. (1978)	USGSOFR78-841

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...