komatiiten.

/kəʊˈmatɪʌɪt/

Etymology: < the name of the Komati river, Mpumalanga province, South Africa, site of the first occurrence to be so designated + -ite suffix¹.

Geology.

An ultramafic extrusive rock notably rich in magnesium, often with a characteristic spinifex texture.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > mineral composition

fem1902

sal1902

ultramafic1933

ultrabasic1964

komatiite1969

1969 M. J. Viljoen & R. P. Viljoen in Geol. Soc. S. Afr. Special Publ. II. iv. 60 All of these peridotitic rocks have a distinctive and unusual chemical composition. They are unlike any class of peridotitic or picritic rock known and a new name, peridotitic komatiite,..has been proposed.

1969 M. J. Viljoen & R. P. Viljoen in Geol. Soc. S. Afr. Special Publ. II. v. 89 It is suggested that these rocks, which have chemical affinities with the associated ultramafics, might well constitute a new class of basaltic rock and the name basaltic komatiite is proposed.

1977 Jrnl. Petrol. 18 321 Three types of komatiites are recognized: peridotitic, pyroxenitic, and basaltic komatiites.

1979 Nature 5 Apr. 545/1 Gorgona is one of the rare places in the world where young pyroxenitic komatiites exhibiting typical quenched spinifex textures..occur.

1992 S. P. Maran Astron. & Astrophysics Encycl. 547/1 A minor constituent of these ancient volcanic rocks..is..komatiite, which indicates that the early Earth had a hotter mantle and greater magma production than it does now.

Derivatives

komatiˈitic adj. of the nature of, containing, or resembling komatiite.

ΘΚΠ

the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > mineral composition

basic1854

acid1859

ultrabasic1881

femic1902

sal1909

ultramafic1933

komatiitic1975

1975 Nature 4 Dec. 413/2 Included in the DAT category are komatiitic tholeiites.

1989 Jrnl. Petrol. 30 179 The komatiitic series will be hereafter divided into peridotitic.., pyroxenitic.., and basaltic.

1993 P. Kearey Encycl. Solid Earth Sci. 355/1 The association of komatiites and komatiitic basalts is termed the komatiite suite or series.

This entry has not yet been fully updated (first published 1997; most recently modified version published online December 2018).

单词	komatiite
释义	komatiiten. /kəʊˈmatɪʌɪt/ Etymology: < the name of the Komati river, Mpumalanga province, South Africa, site of the first occurrence to be so designated + -ite suffix¹. Geology. An ultramafic extrusive rock notably rich in magnesium, often with a characteristic spinifex texture. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > mineral composition fem1902 sal1902 ultramafic1933 ultrabasic1964 komatiite1969 1969 M. J. Viljoen & R. P. Viljoen in Geol. Soc. S. Afr. Special Publ. II. iv. 60 All of these peridotitic rocks have a distinctive and unusual chemical composition. They are unlike any class of peridotitic or picritic rock known and a new name, peridotitic komatiite,..has been proposed. 1969 M. J. Viljoen & R. P. Viljoen in Geol. Soc. S. Afr. Special Publ. II. v. 89 It is suggested that these rocks, which have chemical affinities with the associated ultramafics, might well constitute a new class of basaltic rock and the name basaltic komatiite is proposed. 1977 Jrnl. Petrol. 18 321 Three types of komatiites are recognized: peridotitic, pyroxenitic, and basaltic komatiites. 1979 Nature 5 Apr. 545/1 Gorgona is one of the rare places in the world where young pyroxenitic komatiites exhibiting typical quenched spinifex textures..occur. 1992 S. P. Maran Astron. & Astrophysics Encycl. 547/1 A minor constituent of these ancient volcanic rocks..is..komatiite, which indicates that the early Earth had a hotter mantle and greater magma production than it does now. Derivatives komatiˈitic adj. of the nature of, containing, or resembling komatiite. ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > mineral composition basic1854 acid1859 ultrabasic1881 femic1902 sal1909 ultramafic1933 komatiitic1975 1975 Nature 4 Dec. 413/2 Included in the DAT category are komatiitic tholeiites. 1989 Jrnl. Petrol. 30 179 The komatiitic series will be hereafter divided into peridotitic.., pyroxenitic.., and basaltic. 1993 P. Kearey Encycl. Solid Earth Sci. 355/1 The association of komatiites and komatiitic basalts is termed the komatiite suite or series. This entry has not yet been fully updated (first published 1997; most recently modified version published online December 2018). < n.1969
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