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:
Tyllakh Brown Coal Deposit, Lena River Basin, Bulun District, Polar Yakutia, Sakha Republic (Yakutia), Russia

Oldest recorded age at locality: 174
Youngest recorded age at locality: 100

mindat Locality ID: 19830
mindat URL: http://www.mindat.org/loc-19830.html

Tectonic Settings:

Total number of sublocalities beneath "Tyllakh Brown Coal Deposit, Lena River Basin, Bulun District, Polar Yakutia, Sakha Republic (Yakutia), Russia": 0
Total number of bottom-level sublocalities: 0

Latitude: 0°0'0"N
Longitude: 0°0'0"E
Decimal Degree (lat, lon): 0,0

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	None	Oxalate	Stepanovite

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: C Ca Fe H Mg Na O

Elements from minerals reported directly at this locality: C Ca Fe H Mg Na O

Structural Groups for minerals in this locality:
Calcite None Oxalate Stepanovite

5 IMA Minerals at location:

Calcite ()*	Dolomite ()*	Stepanovite ()*	Weddellite ()*	Whewellite ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Calcite ()*	Calcite	Ca(CO₃)	174	100	27770
Dolomite ()*	None	CaMg(CO₃)₂	174	100	9895
Stepanovite ()*	Stepanovite Oxalate	NaMgFe³⁺(C₂O₄)₃·9H₂O	174	100	2
Weddellite ()*	Oxalate	Ca(C₂O₄)·2H₂O	174	100	32
Whewellite ()*	Oxalate	Ca(C₂O₄)·H₂O	174	100	66

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Michelle_362	Lena Coal Basin includes three major structures: Lena–Anabar and cis-Upper Yana basins and Vilyui syneclise. The coal varies from 700 m to 4000 m thick. Stepanovite occurs in thin veinlets in association with calcite, dolomite, whewellite, and weddellite.

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
	Michelle_362	174	100	Middle Jurassic-Lower Cretaceous		Age of coal deposit					Yes				2763	Lena River Basin, Bulun District, Polar Yakutia, Sakha Republic (Yakutia), Russia	Lena Coal Basin	Kashirtsev et al. (2010)	10.1016/j.rgg.2010.03.007	RGG51_404	Age of coal deposit

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...