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:
Lynnfield Serpentinite Area, Lynnfield, Essex Co., Massachusetts, USA

Oldest recorded age at locality: 369
Youngest recorded age at locality: 246

mindat Locality ID: 32077
mindat URL: http://www.mindat.org/loc-32077.html

Tectonic Settings:

Total number of sublocalities beneath "Lynnfield Serpentinite Area, Lynnfield, Essex Co., Massachusetts, USA": 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.

Brucite	Calcite	Clay	None	Serpentine	Spinel	Talc

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 Fe H Mg O Si

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

Structural Groups for minerals in this locality:
Brucite Calcite Clay None Serpentine Spinel Talc

6 IMA Minerals at location:

Antigorite ()*	Brucite ()*	Chrysotile ()*	Magnesite ()*	Magnetite ()*
Talc ()*

Mineral name	Structural Groups	IMA Formula	Max Age (Ma)	Min Age (Ma)	# of localities containing mineral
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	369	246	708
Brucite ()*	Brucite	Mg(OH)₂	369	246	462
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	369	246	951
Magnesite ()*	Calcite	Mg(CO₃)	369	246	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	369	246	14899
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	369	246	3337

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	Age from other Locality	MinDat Locality ID	Dated Locality (Max Age)	Location as listed in reference	Reference	Reference DOI	Reference ID
Alexandra-0417	262	246	254 ± 8	K-Ar	Age of basalt	whole rock	Yes	22345	Lynnfield, Essex Co., Massachusetts, USA	Lynnfkld	Zartman et al. (1970)	10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2	GSAB81_3359
Alexandra-0418	268	252	260 ± 8	K-Ar	Age of granite	biotite	Yes	22345	Lynnfield, Essex Co., Massachusetts, USA	Lynnfkld	Zartman et al. (1970)	10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2	GSAB81_3359
Alexandra-0419	369	349	359 ± 10	K-Ar	Age of granite	hornblende	Yes	22345	Lynnfield, Essex Co., Massachusetts, USA	Lynnfkld	Zartman et al. (1970)	10.1130/0016-7606(1970)81[3359:APDOKR]2.0.CO;2	GSAB81_3359

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...