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:
Mount Namjagbarwa (Mount Nanjiabawa), Mêdog Co. (Motuo Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China

Oldest recorded age at locality: 5.5
Youngest recorded age at locality: 3.5

mindat Locality ID: 235214
mindat URL: http://www.mindat.org/loc-235214.html

Tectonic Settings:

Total number of sublocalities beneath "Mount Namjagbarwa (Mount Nanjiabawa), Mêdog Co. (Motuo Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China": 1
Total number of bottom-level sublocalities: 1

Number of Child Localities: 1
Child Localities:
Astrophyllite Locality

Latitude: 29°37'53"N
Longitude: 95°3'17"E
Decimal Degree (lat, lon): 29.631388888889,95.054722222222

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.

Amphibole	Astrophyllite	Calcite	Clay	Corundum	Garnet	Mica	None	Spinel

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 F Fe H K Mg Na O Si Ti

Elements from minerals reported directly at this locality:

Structural Groups for minerals in this locality:
Amphibole Astrophyllite Calcite Clay Corundum Garnet Mica None Spinel

8 IMA Minerals at location:

Almandine ()*	Astrophyllite ()*	Calcite ()*	Dolomite ()*	Geikielite ()*
Pargasite ()*	Phlogopite ()*	Spinel ()*

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
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	5.5	3.5	1	43888	2353
Astrophyllite ()*	Astrophyllite	K₂NaFe²⁺₇Ti₂(Si₄O₁₂)₂O₂(OH)₄F	5.5	3.5	1	43888	161
Calcite ()*	Calcite	Ca(CO₃)	5.5	3.5	1	43888	27770
Dolomite ()*	None	CaMg(CO₃)₂	5.5	3.5	1	43888	9895
Geikielite ()*	Corundum	MgTiO₃	5.5	3.5	1	43888	70
Pargasite ()*	Amphibole	NaCa₂(Mg₄Al)(Si₆Al₂)O₂₂(OH)₂	5.5	3.5	1	43888	313
Phlogopite ()*	Mica Clay	KMg₃(AlSi₃O₁₀)(OH)₂	5.5	3.5	1	43888	2273
Spinel ()*	Spinel	MgAl₂O₄	5.5	3.5	1	43888	1934

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
Jen_0000583	MAGMATIC STYLE: Two veins (A and B) each 30 cm wide and more than 1 km long.
Jen_0000584	MAGMATIC STYLE: Two veins (A and B) each 30 cm wide and more than 1 km long.
Jen_0000585	MAGMATIC STYLE: Two veins (A and B) each 30 cm wide and more than 1 km long.

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Sample Source	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Jen_0000583	4.5	4.5	4.5				235214	Mount Namjagbarwa (Mount Nanjiabawa), Mêdog Co. (Motuo Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China	Namjagbarwa	Woolley and Kjarsgaard (2008)	10.4095/225115	GSCOF5796
Jen_0000584	5.5	5.5	5.5	K-Ar	phlogopite	Phlogopite	235214	Mount Namjagbarwa (Mount Nanjiabawa), Mêdog Co. (Motuo Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China	Namjagbarwa	Yang and Woolley(2006)		JAES27_559
Jen_0000585	3.5	3.5	3.5	K-Ar	phlogopite	Phlogopite	235214	Mount Namjagbarwa (Mount Nanjiabawa), Mêdog Co. (Motuo Co.), Nyingtri Prefecture (Linzhi Prefecture), Tibet, China	Namjagbarwa	Yang and Woolley(2006)		JAES27_559

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...