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:
Alchuri Pegmatite Localities, Alchuri (Alchori; Aschudi), Shigar District, Gilgit-Baltistan, Pakistan

Oldest recorded age at locality: 55
Youngest recorded age at locality: 4.5

mindat Locality ID: 231790
mindat URL: http://www.mindat.org/loc-231790.html

Tectonic Settings:

Total number of sublocalities beneath "Alchuri Pegmatite Localities, Alchuri (Alchori; Aschudi), Shigar District, Gilgit-Baltistan, Pakistan": 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.

Apatite	Beryl	Feldspar	None	Quartz	Tourmaline

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 B Be Ca F Fe H K Na O P Si

Elements from minerals reported directly at this locality: Al B Be Ca F Fe H K Na O P Si

Structural Groups for minerals in this locality:
Apatite Beryl Feldspar None Quartz Tourmaline

6 IMA Minerals at location:

Albite ()*	Beryl ()*	Fluorapatite ()*	Microcline ()*	Quartz ()*
Schorl ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	55	4.5	8803
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	55	4.5	4286
Fluorapatite ()*	Apatite	Ca₅(PO₄)₃F	55	4.5	2740
Microcline ()*	Feldspar	K(AlSi₃O₈)	55	4.5	4924
Quartz ()*	Quartz	SiO₂	55	4.5	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	55	4.5	2705

Locality Notes from all Ages at Locality:

Age ID	Locality Notes
AJG8_9877_001	The Dassu orthogneiss hosts many pegmatites, Gilgit is the location of several of these pegmatites
AJG8_9877_002	The Dassu orthogneiss hosts many pegmatites, Gilgit is the location of several of these pegmatites
AJG8_9877_003	Shigar Valley pegmatites

3 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Age Interpret	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID	Age Notes
AJG8_9877_001	7.4	6.8	7.1±0.3		Yes	2530	Gilgit, Gilgit District, Gilgit-Baltistan, Pakistan	Dassu orthogneiss	Agheem et al. (2015)	10.1007/s12517-015-1900-x	AJG8_9877	The age of the pegmatites is younger than the Dassu orthogneiss which hosts them, there is no metamorphic overprint on the pegmatites
AJG8_9877_002	4.9	4.5	4.7±0.2		Yes	2530	Gilgit, Gilgit District, Gilgit-Baltistan, Pakistan	Dassu orthogneiss	Agheem et al. (2015)	10.1007/s12517-015-1900-x	AJG8_9877	The age of the pegmatites is younger than the Dassu orthogneiss which hosts them, there is no metamorphic overprint on the pegmatites
AJG8_9877_003	55	50	55-50	age of collision	Yes	2530	Gilgit, Gilgit District, Gilgit-Baltistan, Pakistan	Shigar Valley pegmatites	Agheem et al. (2015)	10.1007/s12517-015-1900-x	AJG8_9877	Trace elements variations place the Shigar Valley pegmatites into syn-collision granite domain. This collision-related magmatism took place when Indian plate collided with the Eurasian plate ~55 to 50 Ma ago (e.g., Molnar and Tapponnier 1975; Petterson and Windley 1985; Beck et al. 1995; Rowley 1996; Bignold and Treloar 2003; Rehman et al. 2011)

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...