Vote for your favorite mineral in #MinCup26! - Pyromorphite vs. Graphite
Linked by archaic translations and mineralogical misunderstandings, the quarterfinals are ending in hexagons with vivid pyromorphite vs writeable graphite.
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Biotite from
Beemerville main nepheline-syenite mass, Libertyville, Wantage Township, Sussex County, New Jersey, USA


Locality type:Dike swarm
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Age information
Maximum recorded age:437 ± 22 Ma
Minimum recorded age:437 ± 22 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1437 ± 22 MaLlandovery - K-Ar
2437 ± 22 MaLlandovery - K-Ar
Sample references:
1 -
Zartman, R.E., Brock, M.R., Heyl, A.V., and Thomas, H.H. (1967) K-Ar and Rb-Sr ages of some alkalic intrusive rocks from central and eastern United States. American Journal of Science, vol. 265, pp. 848-870.
2 -
Zartman, R.E., Brock, M.R., Heyl, A.V., and Thomas, H.H. (1967) K-Ar and Rb-Sr ages of some alkalic intrusive rocks from central and eastern United States. American Journal of Science, vol. 265, pp. 848-870.
Comments:Occurs in a nepheline-syenite mass.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Beemerville main nepheline-syenite mass, Libertyville, Wantage Township, Sussex County, New Jersey, USA
Data Identifiers
Mindat Occurrence Record ID:71086
Long-form Identifier:1:3:71086:0
GUID (UUID V4):0
Nearest other occurrences of Biotite
7.2km (4.5 miles) ⓘWykertown nepheline syenite intrusive, Wykertown, Frankford Township, Sussex County, New Jersey, USA
12.3km (7.7 miles) ⓘEastern Concrete Materials Inc. Quarry (Raia Quarry; Cofrancisco Quarry; Hamburg Quarry), Hamburg, Sussex County, New Jersey, USA
14.3km (8.9 miles) ⓘMcAfee Quarry, McAfee, Vernon Township, Sussex County, New Jersey, USA
15.4km (9.6 miles) ⓘPochuck Mountain, McAfee, Vernon Township, Sussex County, New Jersey, USA
15.7km (9.8 miles) ⓘDouble Rock pegmatite, Franklin Mine, Franklin, Sussex County, New Jersey, USA
18.2km (11.3 miles) ⓘSterling Mine, Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
18.3km (11.3 miles) ⓘPassaic pit (Marshall Mine; Passaic Mine), Sterling Hill, Ogdensburg, Sussex County, New Jersey, USA
19.7km (12.2 miles) ⓘLime Crest Quarry, Sparta Township, Sussex County, New Jersey, USA
21.4km (13.3 miles) ⓘCopper Mine shaft, Edison Mine, Sparta Township, Sussex County, New Jersey, USA
21.5km (13.4 miles) ⓘEdison Mine, Sparta Township, Sussex County, New Jersey, USA
References
Rutgers Univ. Bull. #5, Pt 1: 53-54
NJ State Geol. Ann. Rpt. (1896):92.
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 28, 2026 20:54:10
Go to top of page