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Subalkali basalt

A rock classification type
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00742160017272472733946.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
07025250017272472738659.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
01419850017272472743087.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
01749700017272253906536.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
08307620017272253907293.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
01419850017272472743087.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
01749700017272253906536.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
08307620017272253907293.jpg
Tholeiitic basalt, etc.

Schaumberg, Tholey, Sankt Wendel, Saarland, Germany
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About Subalkali basaltHide

A basalt lacking normative nepheline.


Unique IdentifiersHide

Mindat ID:
48496
Long-form identifier:
mindat:1:1:48496:1

Classification of Subalkali basaltHide

QAPF_V_10,_10star.png

Subalkali basalt appears in fields 10 and 10* in the QAPF diagram.


TAS_B.png

Subalkali basalt is found in field B in the TAS diagram.

Sub-divisions of Subalkali basaltHide

Mineralogy of Subalkali basaltHide

Essential minerals - these are minerals that are required within the classification of this rock:
Calcic plagioclaseA petrological term for plagioclase series feldspars dominant in calcium.
PyroxeneA petrological term for Pyroxene Group.

Pronunciation of Subalkali basaltHide

Pronunciation:
PlayRecorded byCountry
Jolyon RalphUnited Kingdom

Age distributionHide

Recorded ages:
Phanerozoic : 66.8 ± 0.3 Ma to 0 Ma - based on 12 recorded ages.
Sample ages:
Sample IDRecorded ageGeologic TimeDating method
1At least 200 MaEarly Jurassic
20.375 ± 0.05 MaPleistoceneK-Ar
30.4 Ma to present dayPleistoceneK-Ar
40.43 ± 0.02 MaPleistoceneK-Ar
52.3 ± 0.1 to 1.2 ± 0.1 MaPleistoceneAr-Ar
64.00 ± 0.06 MaPlioceneK-Ar
711.76 ± 0.02 to 11.14 ± 0.12 MaMioceneK-Ar
812 to 9 MaMiocene
920 to 10 MaMioceneK-Ar
1023.7 ± 0.7 to 23.2 ± 0.7 MaOligoceneK-Ar
1164.7 ± 1.1 to 42.4 ± 2.3 MaPaleogene
1266.8 ± 0.3 MaLate/Upper CretaceousAr-Ar
Sample references:
IDLocalityReferenceNotes
1Straumsvola complex, Queen Maud Land, East Antarctica, Antarctica
Grantham, G. H., Guise, P. D., Spell, T., & Havenga, A. (1998). The chronology of Jurassic intrusions, HU Sverdrupfjella, Dronning Maud Land, Antarctica. Journal of African Earth Sciences, 27(1), 92.
2Mauna Kea summit region, Hawaii County, Hawaii, USA
Clague, D. A., & Dalrymple, G. B. (1989). Tectonics, geochronology, and origin of the Hawaiian-Emperor volcanic chain. The Geology of North America, 188-217.
3Kilauea Volcano, Hawaii County, Hawaii, USA
Clague, D. A., & Dalrymple, G. B. (1989). Tectonics, geochronology, and origin of the Hawaiian-Emperor volcanic chain. The Geology of North America, 188-217.
4Kohala volcano, Hawaii County, Hawaii, USA
Clague, D. A., & Dalrymple, G. B. (1989). Tectonics, geochronology, and origin of the Hawaiian-Emperor volcanic chain. The Geology of North America, 188-217.
5Mingxi volcanic field, Mingxi County, Sanming, Fujian, China
Ho, K. S., Chen, J. C., Lo, C. H., & Zhao, H. L. (2003). 40Ar
olivine tholeiite
6Ua Pou Island, Marquesas Islands, French Polynesia, France
Legendre, C., Maury, R. C., Caroff, M., Guillou, H., Cotten, J., Chauvel, C., ... & Rossi, P. (2005). Origin of exceptionally abundant phonolites on Ua Pou Island (Marquesas, French Polynesia): Partial melting of basanites followed by crustal contamination. Journal of Petrology, 46(9), 1925-1962. doi.org/10.1093/petrology/egi043
7Mururoa, Tuamotu Archipelago, Tuamotu-Gambier, French Polynesia, France
Guillou, Hervé; Guille, Gérard; Brousse, Robert; Bardintzeff, J. M. (1990) Evolution de basaltes tholeiitiques vers des basaltes alcalins dans le substratum volcanique de Fangataufa (Polynesie francaise). Bulletin de la Société Géologique de France, VI (3). p.537-549. doi:10.2113/gssgfbull.vi.3.537
8Shiting-Yinko Area, Xindian District, New Taipei City, Taiwan
Chen, C. H., Chung, S. H., Hwang, H. H., Chen, C. H., & Chung, S. L. (2001). Petrology and geochemistry of Neogene continental basalts and related rocks in northern Taiwan (III): Alkali basalts and tholeiites from Shiting-Yinko area. Western Pacific Earth Sciences, 1(1), 19-46.
9Hessian Depression, Kassel Region, Hesse, Germany
Wedepohl, K. H. (1982). K
10Bunya Mountains, Moreton Bay Region, Queensland, Australia
EWART, A. (1982) Petrogenesis of the Tertiary Anorogenic Volcanic Series of Southern Queensland, Australia, in the Light of Trace Element Geochemistry and O, Sr and Pb Isotopes. Journal of Petrology, 23 (3) 344-382 doi:10.1093/petrology/23.3.344
11Emperor Seamounts, Pacific Ocean
Clague, D. A., & Dalrymple, G. B. (1989). Tectonics, geochronology, and origin of the Hawaiian-Emperor volcanic chain. The Geology of North America, 188-217.
12Kutch Complex, Nakhatrana Taluka, Kutch District, Gujarat, India
Pande, K., Venkatesan, T. R., Gopalan, K., Krishnamurthy, P., & Macdougall, J. D. (1988). 40Ar-39Ar ages of alkali basalts from Kutch, Deccan volcanic province, India. Memoir-Geological Society of India, (10), 145-150.

Synonyms of Subalkali basaltHide

Internet Links for Subalkali basaltHide

References for Subalkali basaltHide

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