Log InRegister
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 Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Maratakka, Nickerie District, Suriname

This page is currently not sponsored. Click here to sponsor this page.
Latitude & Longitude (WGS84): 5° 11' 37'' North , 56° 54' 16'' West
Latitude & Longitude (decimal): 5.19361114502, -56.9044456482

Small metasedimentary hornfels xenoliths in a gabbroic body.

At Maratakka the sand-covered Precambrian basement is not exposed.
Drilling showed the basement to consist of a mafic body, a few kilometers in size, surrounded by granite, presumably with metasedimentary enclaves (Bosma et al., 1975).
The mafic body consists of quartz gabbro-norite and biotite-quartz diorite and is cut locally by granite veins.
The metasedimentary hornfels xenoliths in the gabbroic body contain, in addition to grandidierite, antiperthitic andesine, perthite, cordierite, biotite, spinel, magnetite, and minor corundum, apatite, zircon, and ilmenite.
Biotite forms poikiloblasts of random orientation in a fine-grained granoblastic matrix of andesine, perthite, and cordierite.
Magnetite and dark green spinel occur as small, euhedral crystals, partly enclosed in biotite, as aggregates in feldspar, and as irregular poikiloblastic masses.
Other xenoliths, without grandidierite, contain additional sillimanite (with or without quartz) and locally some andalusite.
In one sample a grandidierite-bearing hornfels occurs together with a hornfels of fine-grained, granoblastic andesine and poikiloblastic hypersthene.

Mineral List

11 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

0 - 66 Ma
Cenozoic sedimentary rocks

Age: Cenozoic (0 - 66 Ma)

Description: Guyana Basin

Lithology: Sedimentary rocks

Reference: Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d. [18]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Bosma, W., Lokhorst, A., and De Roever, E.W.F. (1975) Geophysical, geochemical, and geological characteristics of some De Goeje-type gabbroic bodies. Geol. Mijnbouwkd. Dienst Suriname, Med. 23.

De Roever, E.W.F. and Kieft, C. (1976) Grandidierite of contact-metamorphic origin from Maratakka, northwest Surinam. American Mineralogist, vol. 61, 332-333.

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: January 22, 2019 00:12:54 Page generated: October 12, 2017 01:08:22
Go to top of page