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

Juromenha meteorite, Alandroal, Évora, Portugali
Regional Level Types
Juromenha meteoriteMeteorite Fall Location
Alandroal- not defined -

This page is currently not sponsored. Click here to sponsor this page.
Lock Map
Name(s) in local language(s):, Alandroal, Distrito de Évora, Portugal
Latitude & Longitude (WGS84): 38° 44' 25'' North , 7° 16' 12'' West
Latitude & Longitude (decimal): 38.74028,-7.27000
GeoHash:G#: eyfu6s6nk
Locality type:Meteorite Fall Location
Meteorite Class:IIIAB iron meteorite
Meteoritical Society Class:Iron, IIIAB
Metbull:View entry in Meteoritical Bulletin Database
Köppen climate type:Csa : Hot-summer Mediterranean climate

Iron meteorite, ataxite (IIIAB, D)
Fell,14 Nov 1968; 25.25 kg

A meteorite struck slightly moist soil with a deafening blast, created a hole .8 meters deep, and came to rest as a single roughly ellipsoidal mass (30 x 20 x 10 cm). Like many meteorites, one surface is smoothly domed, while the opposite surface is characterized by distinct regmaglypts. The interior, however, is not your usual medium-sized iron meteorite. While compositionally similar to many octahedrites, the ataxitic interior is dominated by small polycrystalline kamacite grains, assorted small blebs of taenite, a multitude of tiny phosphide grains, and other features that suggest a sudden melting (shock melting!?) followed by quick cooling. Such events would have prevented the development of the normal Widmanstätten pattern and exsolved minor accessories normally observed in IIIAB irons. The oxide crust is two-phased, composed of wüstite, FeO and magnetite, Fe304 . Cosmic exposure ages of 30-35 million years have been reported.

Juromenha is one of only 11 witnessed falls of IIIAB meteorites. The main mass is with the Center of Geological Studies in Lisbon.

Regions containing this locality

Iberian Peninsula

Peninsula - 1,601 mineral species & varietal names listed

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

5 valid minerals.

Meteorite/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

Detailed Mineral List:

'IIIAB iron meteorite'
Reference: Meteoritical Society Database
Formula: Fe
Description: As polycrystalline grains size of 0.07 mm
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.
Iron var: Kamacite
Formula: (Fe,Ni)
Description: As polycrystalline grains size of 0.07 mm
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.
Formula: Fe2+Fe3+2O4
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.
Formula: (Fe,Ni)3P
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.
Formula: (Fe,Ni)
Description: As subangular blebs found most often in dark areas near grain boundaries.
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.
Formula: FeO
Reference: Buchwald, V. F. (1975) Handbook of Iron Meteorites, vol 2. University of California Press.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
var: Kamacite1.AE.05(Fe,Ni)
Group 4 - Oxides and Hydroxides
Unclassified Minerals, Rocks, etc.
'IIIAB iron meteorite'-

List of minerals arranged by Dana 8th Edition classification

Metals, other than the Platinum Group
var: Kamacite,Ni)
Unclassified Minerals, Rocks, etc.
'IIIAB iron meteorite'-

List of minerals for each chemical element

O MagnetiteFe2+Fe23+O4
O WüstiteFeO
P Schreibersite(Fe,Ni)3P
Fe IronFe
Fe Iron (var: Kamacite)(Fe,Ni)
Fe MagnetiteFe2+Fe23+O4
Fe Schreibersite(Fe,Ni)3P
Fe Taenite(Fe,Ni)
Fe WüstiteFeO
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P
Ni Taenite(Fe,Ni)

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

Early Devonian - Ordovician
393.3 - 485.4 Ma

ID: 3152125
Ordovician quartzite

Age: Paleozoic (393.3 - 485.4 Ma)

Description: low grade metamorphic

Lithology: Major:{quartzite}, Minor{phyllite,shale/slate,meta-volcanic rock group}

Reference: Asch, K. The 1:5M International Geological Map of Europe and Adjacent Areas: Development and Implementation of a GIS-enabled Concept. Geologisches Jahrbuch, SA 3. [147]

Early Ordovician - Late Cambrian
470 - 501 Ma

ID: 3187313
Paleozoic crystalline metamorphic rocks

Age: Paleozoic (470 - 501 Ma)

Stratigraphic Name: Osso Formation

Comments: Zona De Ossa Morena

Lithology: Metasedimentary schist

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

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


Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Krinov, E. L. [Ed.] (1970). Meteoritical Bulletin, No. 36-48,#45. In : Meteoritics, vol. 5, #2, pages 85-109. (June 1970)
Buchwald, V. F. (1975) Handbook of Iron Meteorites. University of California Press. 1418 pages.
Grady, M. M. (2000) Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge, New York, Oakleigh, Madrid, Cape Town. 690 pages.

External Links

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.
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. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: May 19, 2019 12:19:28 Page generated: November 30, 2018 13:40:03
Go to top of page