carbonatiten.
/kɑːˈbɒnətʌɪt/, U.S. /ˌkɑrˈbɑnəˌtaɪt/ Geology.
Any intrusive or extrusive igneous rock containing a significant proportion (usually greater than 20 per cent) of carbonate minerals.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [noun] > other igneous
clay-stone1777
variolite1781
pyroxenite1845
aplite1862
anorthosite1863
teschenite1866
yellow ground1883
kimberlite1887
sanidinite1887
websterite1890
essexite1891
monzonite1895
missourite1896
theralite1898
heronite1899
kentallenite1900
carbonatite1924
wonderstone1936
1924 Amer. Jrnl. Sci. 208 2 The intrusion of carbonatite took place, in part at least, contemporaneously with that of ijolite.
1965 A. Holmes Princ. Physical Geol. (rev. ed.) xxix. 1077 We know nothing about the origin of the carbonatites that are so curiously involved in uplifts, rift valleys and alkaline rocks.
1977 A. Hallam Planet Earth 164/3 Ancient carbonatite intrusions are composed of calcium, magnesium or iron carbonates; though at least one volcano..has in recent times emitted ashes and flows of sodium carbonate.
2004 M. Widdowson in N. McBride & I. Gilmour Introd. Solar Syst. iii. 112 (caption) Carbonatite does not solidify until it cools below 500 °C, and so could remain liquid for a long time after its eruption on to the hot surface of Venus.
Derivatives
ˌcarbonaˈtitic adj. of the nature of a carbonatite; consisting of carbonatites.
ΚΠ
1952 Geochimica et Cosmochimica Acta 2 208 A primary basic magma, originally rich in carbonates, gives rise on solidifying a residual magma exceedingly rich in carbonates and produces ultimately carbonatitic alkaline hydrothermal liquids.
2002 Jrnl. Petrol. 43 1750/1 Xenoliths embedded in the ankaramitic and carbonatitic tuffs..have provided valuable insights into the makeup of the continental lithosphere beneath northern Tanzania.
This entry has been updated (OED Third Edition, December 2008; most recently modified version published online December 2021).
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n.1924