Vote for your favorite mineral in #MinCup26! - Erythrite vs. Skutterudite
Pretty pink and poisonous Erythrite is against its shiny silver and structurally-useful Skutterudite.
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

Ultramafic-rock

A rock subtype
This page is currently not sponsored. Click here to sponsor this page.
03902680017271952819060.jpg
Lherzolite

Peridot Mesa, San Carlos, Gila County, Arizona, USA
04769240017272472737129.jpg
Dunite, etc.

Gusdal Olivine Pit, Almklovdalen, Vanylven, Møre og Romsdal, Norway
06114500017272022117372.jpg
Dunite, etc.

Dun Mountain, Nelson Region, New Zealand
03902680017271952819060.jpg
Lherzolite

Peridot Mesa, San Carlos, Gila County, Arizona, USA
04769240017272472737129.jpg
Dunite, etc.

Gusdal Olivine Pit, Almklovdalen, Vanylven, Møre og Romsdal, Norway
06114500017272022117372.jpg
Dunite, etc.

Dun Mountain, Nelson Region, New Zealand
00021350017271952866833.jpg
Lherzolite

Peridot Mesa, San Carlos, Gila County, Arizona, USA
04769240017272472737129.jpg
Dunite, etc.

Gusdal Olivine Pit, Almklovdalen, Vanylven, Møre og Romsdal, Norway
Hide all sections | Show all sections

About Ultramafic-rockHide

Originally a term for a rock consisting essentially of mafic minerals, e.g. peridotite, dunite. Now defined as a rock with M > 90%, fine- or coarse-grained.


Unique IdentifiersHide

Mindat ID:
48401
Long-form identifier:
mindat:1:1:48401:3

Classification of Ultramafic-rockHide

Sub-divisions of Ultramafic-rockHide

Age distributionHide

Recorded ages:
Neoproterozoic to Quaternary : 773 ± 18 Ma to 0 Ma - based on 16 recorded ages.
Sample ages:
Sample IDRecorded ageGeologic TimeDating method
15.332 to 2.588 MaCenozoic
273 to 66 MaLate/Upper CretaceousK-Ar
382.7 to 74.7 MaLate/Upper CretaceousK-Ar
486.9 to 78.5 MaLate/Upper CretaceousK-Ar
5107.2 ± 0.8 MaEarly/Lower CretaceousAr-Ar
6243 ± 10 MaMiddle TriassicSm-Nd isochron
7274.3 ± 2.2 MaCisuralianRe-Os
8334 MaMississippian
9402 to 380 MaDevonianK-Ar
10540 ± 39 to 521 ± 22 MaTerreneuvianSm-Nd and Rb-Sr internal isochron
11773 ± 18 MaTonianRb-Sr whole rock isochron
Sample references:
IDLocalityReferenceNotes
1Nepheline occurrence, Wuxi, Jiangsu, China
QI, Q. U., TAYLOR, L. A, ZHOU, X. (1995) Petrology and Geochemistry of Mantle Peridotite Xenoliths from SE China. Journal of Petrology, 36 (1) 55-79 doi:10.1093/petrology/36.1.55
2Tapira Complex, Tapira, Minas Gerais, Brazil
Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189
3Serra do Salitre carbonatite, Minas Gerais, Brazil
Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189
4  "  "
Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189
5Sung Valley complex, East Khasi Hills District, Meghalaya, India
Sarkar, A., Datta, A. K., Poddar, B. C., Bhattacharyya, B. K., Kollapuri, V. K., & Sanwal, R. (1996). Geochronological studies of Mesozoic igneous rocks from eastern India. Journal of Southeast Asian Earth Sciences, 13(2), 77-81.
pyroxenite and 2 phlogopite separates from carbonatite
6Fanshan Mine, Zhuolu County, Zhangjiakou, Hebei, China
Mu, B., Shao, J., Chu, Z., Yan, G., & Qiao, G. (2001). Sm
Whole rock samples and minerals
7Huangshandong Cu-Ni-PGE deposit, Huangshan-Jing'erquan ore belt, Yizhou District, Hami Prefecture, Xinjiang, China
Jingwen, M., Jianmin, Y., Wenjun, Q., Andao, D., Zhiliang, W., & Chunming, H. (2003). Re?Os Age of Cu?Ni Ores from the Huangshandong Cu?Ni Sulfide Deposit in the East Tianshan Mountains and Its Implication for Geodynamic Processes.
8Luku Complex, Yanbian County, Panzhihua, Sichuan, China
Lin, C., LIu, Y., Wang, Z., & Hong, W. (1995). Rare element and rare-earth element deposits of China. Mineral deposits of China, 3, 226-279.
9Vuoriyarvi alkaline-ultrabasic massif, Northern Karelia, Murmansk Oblast, Russia
Orris, Greta J., Grauch, Richard I. (2002) Rare Earth Element Mines, Deposits, and Occurrences. Open-File Report 2002-189. US Geological Survey doi:10.3133/ofr02189
10Stjernøya Island, Alta, Troms og Finnmark, Norway
Cadow, Renate (1993) Sm-Nd and Rb-Sr ages of hornblende clinopyroxenite and metagabbro from the Lillebukt Alkaline Complex,Seiland Igneous Province. Norsk Geologisk Tidsskrift [Norwegian Journal of Geology], 73 (4). 243-249
Hornblende clinopyroxenite
11Sevattur carbonatite complex, Krishnagiri District, Tamil Nadu, India
Kumar, A., & Gopalan, K. (1991). Precise Rb-Sr age and enriched mantle source of the Sevattur carbonatites, Tamil Nadu, South India. Current Science (Bangalore), 60(11), 653-655.

Other Language Names for Ultramafic-rockHide

Internet Links for Ultramafic-rockHide

References for Ultramafic-rockHide

Quick NavTopAbout Ultramafic-rockUnique IdentifiersClassification Sub-divisions Age distributionOther LanguagesInternet Links References
 
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 2, 2026 01:58:22 Page updated: June 17, 2026 13:01:49
Go to top of page