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:
Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA

Oldest recorded age at locality: 5.3
Youngest recorded age at locality: 0

mindat Locality ID: 212139
mindat URL: http://www.mindat.org/loc-212139.html

Tectonic Settings:

Total number of sublocalities beneath "Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Supen Sulphur Works

Latitude: 40°26'56"N
Longitude: 121°32'53"W
Decimal Degree (lat, lon): 40.448888888889,-121.54805555556

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.

Amorphous	Clay	Kaolinite	None	Sulphur

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 H K O S Si

Elements from minerals reported directly at this locality: Al H K O S Si

Structural Groups for minerals in this locality:
Amorphous Clay Kaolinite None Sulphur

4 IMA Minerals at location:

Alunite ()*	Kaolinite ()*	Opal ()*	Sulphur ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of Sublocalities containing mineral	LOCALITY IDs, not mindat ids	# of localities containing mineral
Alunite ()*	None	KAl₃(SO₄)₂(OH)₆	5.3	0	0		966
Kaolinite ()*	Clay Kaolinite	Al₂Si₂O₅(OH)₄	5.3	0	0		5591
Opal ()*	Amorphous	SiO₂·nH₂O	5.3	0	0		2994
Sulphur ()*	Sulphur	S	0.6	0.45	1	176406	2045

8 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Sample Source	Sample Num	MinDat Locality ID	Dated Locality (Max Age)	Reference	Reference ID
NAVDAT-10419	0.6	0.45	0.53+0.07/-0.08		10419	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-19999	1.8	0.01	0.91+0.89/-0.9	unknown	19999	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-20080	1.8	0.01	0.91+0.89/-0.9	unknown	20080	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-61076	5.3	0	2.65±2.65		61076	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-61077	5.3	0	2.65±2.65		61077	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-61177	5.3	0	2.65±2.65		61177	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-90158	0.47	0.385	0.43+0.04/-0.045		90158	212139	Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT
NAVDAT-10421	0.6	0.45	0.53+0.07/-0.08		10421	92960	Supen Sulphur Works, Brokeoff Mountain, Lassen Volcanic National Park, Cascade Range, Shasta Co., California, USA	NAVDAT	NAVDAT

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...