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:
Clark Ledge Pegmatite Locality, Chesterfield, Hampshire Co., Massachusetts, USA

Oldest recorded age at locality: 373
Youngest recorded age at locality: 336.3

mindat Locality ID: 5971
mindat URL: http://www.mindat.org/loc-5971.html

Tectonic Settings:

Total number of sublocalities beneath "Clark Ledge Pegmatite Locality, Chesterfield, Hampshire Co., Massachusetts, USA": 0
Total number of bottom-level sublocalities: 0

Latitude: 42°25'14"N
Longitude: 72°53'32"W
Decimal Degree (lat, lon): 42.420555555556,-72.892222222222

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.

Autunite	Beryl	Clay	Columbite	Feldspar	Garnet	Mica	None	Pyroxene	Quartz
Rutile	Tourmaline	Zircon

Albite ()*	Almandine ()*	Autunite ()*	Beryl ()*	Cassiterite ()*
Columbite-(Fe) ()*	Columbite-(Mn) ()*	Elbaite ()*	Microcline ()*	Muscovite ()*
Quartz ()*	Schorl ()*	Spodumene ()*	Zircon ()*

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 Fe H K Li Mn Na Nb O P Si Sn U Zr

Elements from minerals reported directly at this locality: Al B Be Ca Fe H K Li Mn Na Nb O P Si Sn U Zr

Structural Groups for minerals in this locality:
Autunite Beryl Clay Columbite Feldspar Garnet Mica None Pyroxene Quartz
Rutile Tourmaline Zircon

14 IMA Minerals at location:

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Albite ()*	Feldspar	Na(AlSi₃O₈)	373	336.3	8803
Almandine ()*	Garnet	Fe²⁺₃Al₂(SiO₄)₃	373	336.3	2353
Autunite ()*	Autunite	Ca(UO₂)₂(PO₄)₂·10-12H₂O	373	336.3	1272
Beryl ()*	Beryl	Be₃Al₂Si₆O₁₈	373	336.3	4286
Cassiterite ()*	Rutile	SnO₂	373	336.3	5171
Columbite-(Fe) ()*	Columbite	Fe²⁺Nb₂O₆	373	336.3	518
Columbite-(Mn) ()*	Columbite	Mn²⁺Nb₂O₆	373	336.3	289
Elbaite ()*	Tourmaline	Na(Al_1.5Li_1.5)Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	373	336.3	520
Microcline ()*	Feldspar	K(AlSi₃O₈)	373	336.3	4924
Muscovite ()*	Mica Clay	KAl₂(Si₃Al)O₁₀(OH)₂	341.9	336.3	17380
Quartz ()*	Quartz	SiO₂	373	336.3	61156
Schorl ()*	Tourmaline	NaFe²⁺₃Al₆(Si₆O₁₈)(BO₃)₃(OH)₃(OH)	373	336.3	2705
Spodumene ()*	Pyroxene	LiAlSi₂O₆	373	336.3	688
Zircon ()*	Zircon	Zr(SiO₄)	373	369	5251

3 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	Dated Mineral	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Alexandra-0183	370.89	370.59	370.74 ± 0.15	U-Pb	Age of pegmatite	zircon	11DW300a	Zircon	5971	Clark Ledge Pegmatite Locality, Chesterfield, Hampshire Co., Massachusetts, USA	Clark Ledge	Bradley et al. (2016)	10.3749/canmin.1600035	CM54_945
Alexandra-0184	341.9	336.3	339.1 ± 2.8	Ar-Ar	Age of pegmatite	muscovite	11Dw300	Muscovite	5971	Clark Ledge Pegmatite Locality, Chesterfield, Hampshire Co., Massachusetts, USA	Clark Ledge	Bradley et al. (2016)	10.3749/canmin.1600035	CM54_945
Bradley_2012_067	373	369	371±2	U/Pb		zircon		Zircon	5971	Clark Ledge Pegmatite Locality, Chesterfield, Hampshire Co., Massachusetts, USA	Clark Ledge	McCauley and Bradley (2014)	10.3749/canmin.52.2.183	CM52_183

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...