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Troctolite, etc.Gabbro Quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
TroctoliteTatern quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
GabbroSandvikhaugane, Flemsøya-Skuløya, Haram, Ålesund, Møre og Romsdal, Norway
Troctolite, etc.Gabbro Quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
TroctoliteTatern quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
GabbroSandvikhaugane, Flemsøya-Skuløya, Haram, Ålesund, Møre og Romsdal, Norway
Troctolite, etc.Gabbro Quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
TroctoliteTatern quarry, Radau valley, Bad Harzburg, Goslar District, Lower Saxony, Germany
Hide all sections | Show all sections About GabbroHide
This section is currently hidden. Click the show button to view.A gabbroid composed of 10-90% Ca-dominant plagioclase and >5% clinopyroxene. A group of basic intrusive igneous rocks composed principally of basic plagioclase (commonly labradorite or bytownite) and clinopyroxene (augite), with or without olivine and orthopyroxene; also, any member of that group. It is the approximate coarse-grained/intrusive equivalent of basalt. Apatite, magnetite, and ilmenite are common accessory minerals. Commonly dark-colored.
Unique IdentifiersHide
This section is currently hidden. Click the show button to view.Mindat ID:48275
🗐Long-form identifier:mindat:1:1:48275:0
🗐Similar NamesHide
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| Gabbro (s.s.) | A synonym of Clinopyroxene-gabbro |
Classification of GabbroHide
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- Rock
- Igneous rock
- Normal crystalline igneous rock
- Coarse-grained ("plutonic") crystalline igneous rock
Gabbro is in section 10 of the QAPF diagram.
Sub-divisions of GabbroHide
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- Gabbro
- Allalin-gabbro
- Cumulitic gabbro
- Orbicular gabbro
- Clinopyroxene-gabbro
- Olivine-gabbro
- Bytownite olivine-gabbro
- Pegmatitic olivine-gabbro
- Porphyritic olivine-gabbro
- Fe-rich-olivine-gabbro
- Gabbronorite
- Olivine-gabbronorite
- Pyroxene-hornblende-gabbronorite
- Hornblende-gabbro
- Norite
- Anorthosite norite
- Andennorite
- Shocked norite
- Clinopyroxene-norite
- Olivine-clinopyroxene norite
- Olivine-norite
- Pyroxene-hornblende-norite
- Olivine-orthopyroxene-gabbro
- Orthopyroxene-gabbro
- Pyroxene-hornblende-gabbro
- Troctolite
- Allivalite
- Bytownite-troctolite
- Harrisite
- Gabbrodiorite
- Leucogabbro
- Melagabbro
- Quartz-norite
- Akoafimite
- Eichstädtite
- Biotite quartz-norite
- Charnockitic norite
- Microgabbro
- Olivine microgabbro
- Aplitic microgabbro
- Pegmatitic gabbro
- Quartz gabbro
- Anorthitissite
- Ferrogabbro
Mineralogy of GabbroHide
This section is currently hidden. Click the show button to view.Essential minerals - these are minerals that are required within the classification of this rock:
| Feldspar > Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Mafic minerals | A petrological term for dark, rock-forming minerals rich in magnesium and/or iron. |
Non-essential minerals - these minerals are common, sometimes major components, but are not always present:
| Amphibole > Hornblende | AnCa2(Z2+5-mZ3+m)(Si8-(n+m)Al(n+m))(OH,F,Cl)2 |
| Mica > Biotite | K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2 |
Age distributionHide
This section is currently hidden. Click the show button to view.Recorded ages:Neochaotian to Quaternary : ~4600 Ma to 0 Ma - based on 19 recorded ages.
Synonyms of GabbroHide
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Finlandite
Other Language Names for GabbroHide
This section is currently hidden. Click the show button to view.Irish Gaelic:
GabróCommon AssociatesHide
This section is currently hidden. Click the show button to view.Associated Minerals Based on Photo Data:
| 7 photos of Gabbro associated with Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| 6 photos of Gabbro associated with Pyroxene Group | ADSi2O6 |
| 4 photos of Gabbro associated with Diallage |
| 3 photos of Gabbro associated with Quartz | SiO2 |
| 2 photos of Gabbro associated with Epidote | (CaCa)(AlAlFe3+)O[Si2O7][SiO4](OH) |
| 2 photos of Gabbro associated with Laumontite | CaAl2Si4O12 · 4H2O |
| 2 photos of Gabbro associated with Pyrite | FeS2 |
| 1 photo of Gabbro associated with Calcite | CaCO3 |
| 1 photo of Gabbro associated with Chlorite Group |
| 1 photo of Gabbro associated with Amphibole Supergroup | AB2C5((Si,Al,Ti)8O22)(OH,F,Cl,O)2 |
Internet Links for GabbroHide
This section is currently hidden. Click the show button to view.mindat.org URL:https://www.mindat.org/min-48275.htmlPlease feel free to link to this page.Search Engines:
Look for Gabbro on GoogleLook for Gabbro images on GoogleLook for Gabbro on BingLook for Gabbro images on BingLook for Gabbro on DuckDuckGoLook for Gabbro images on DuckDuckGoLook for Gabbro in the Rock H. Currier Digital LibraryReferences for GabbroHide
This section is currently hidden. Click the show button to view.Reference List:Watson, Kenneth DeP. (1942) Zoisite-prehnite alteration of gabbro.
American Mineralogist, 27 (9) 638-645 Quick NavTopAbout GabbroUnique IdentifiersSimilar NamesClassification Sub-divisions Mineralogy Age distributionSynonymsOther LanguagesCommon AssociatesInternet Links References
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