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, Essex Co., Massachusetts, USA

Oldest recorded age at locality: 383.26
Youngest recorded age at locality: 246

mindat Locality ID: 22345
mindat URL: http://www.mindat.org/loc-22345.html

Tectonic Settings:

Total number of sublocalities beneath "Lynnfield, Essex Co., Massachusetts, USA": 4
Total number of bottom-level sublocalities: 4

Number of Child Localities: 4
Child Localities:
Kallenberg Quarry (Robin Rock Quarry)
Lynnfield Serpentinite Area
Lynnfield Soapstone Company Quarries
Tophet Hill Mine

Latitude: 42°30'30"N
Longitude: 71°'11"W
Decimal Degree (lat, lon): 42.508333333333,-71.003055555556

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	Clinozoisite	Copper	Corundum	Epidote	Feldspar	Fluorite	None
Pyrite	Pyroxene	Quartz	Rocksalt	Serpentine	Spinel	Talc	Zircon

Albite ()*	Antigorite ()*	Augite ()*	Brucite ()*	Chrysotile ()*
Epidote ()*	Fluorite ()*	Galena ()*	Gold ()*	Graphite ()*
Hematite ()*	Magnesite ()*	Magnetite ()*	Pyrite ()*	Quartz ()*
Siderite ()*	Talc ()*	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 Au C Ca F Fe H Mg Na O Pb S Si Zr

Elements from minerals reported directly at this locality: Al Au C Ca Fe H O Si

Structural Groups for minerals in this locality:
Brucite Calcite Clay Clinozoisite Copper Corundum Epidote Feldspar Fluorite None
Pyrite Pyroxene Quartz Rocksalt Serpentine Spinel Talc Zircon

18 IMA Minerals at location:

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
Albite ()*	Feldspar	Na(AlSi₃O₈)	383.26	335.26	1	219349	8803
Antigorite ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	369	246	1	219350	708
Augite ()*	Pyroxene	(Ca,Mg,Fe)₂Si₂O₆	383.26	335.26	1	219349	2060
Brucite ()*	Brucite	Mg(OH)₂	369	246	1	219350	462
Chrysotile ()*	Serpentine Clay	Mg₃Si₂O₅(OH)₄	369	246	1	219350	951
Epidote ()*	Epidote Clinozoisite	Ca₂(Al₂Fe³⁺)[Si₂O₇][SiO₄]O(OH)	383.26	246	0		8173
Fluorite ()*	Fluorite	CaF₂	369	246	1	219352	9617
Galena ()*	Rocksalt	PbS	369	246	1	219352	24243
Gold ()*	Copper	Au	383.26	246	0		30554
Graphite ()*	None	C	383.26	246	0		2812
Hematite ()*	Corundum	Fe₂O₃	369	246	1	219352	14640
Magnesite ()*	Calcite	Mg(CO₃)	369	246	1	219350	1487
Magnetite ()*	Spinel	Fe²⁺Fe³⁺₂O₄	383.26	246	2	219349,219350	14899
Pyrite ()*	Pyrite	FeS₂	383.26	246	2	219349,219352	39462
Quartz ()*	Quartz	SiO₂	383.26	335.26	1	219349	61156
Siderite ()*	Calcite	Fe(CO₃)	383.26	246	0		6417
Talc ()*	Clay Talc	Mg₃Si₄O₁₀(OH)₂	369	246	1	219350	3337
Zircon ()*	Zircon	Zr(SiO₄)	383.26	335.26	1	219349	5251

4 Ages assigned to this locality:

Excel ID	Max Age (Ma)	Min Age (Ma)	Age as listed in reference	Dating Method	Age Interpret	Sample Source	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	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	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	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
USGS-Rb-Sr-00947	383.26	335.26	359.26±24	Rb-Sr	age of intrusion	whole rock	33588	Kallenberg Quarry (Robin Rock Quarry), Lynnfield, Essex Co., Massachusetts, USA		USGS-Rb-Sr		USGS-Rb-Sr

Sample	Source Locality	Reference URL

All locality data graciously provided by mindat.org

All age data...