(of such igneous rocks as peridotite) containing less than 45 per cent silica
ultrabasic in American English
(ˌultrəˈbeisɪk)
adjective
(of rocks)
containing iron and magnesium, with little or no silica
Also: ultramafic
Word origin
[1890–95; ultra- + basic]This word is first recorded in the period 1890–95. Other words that entered Englishat around the same time include: bootstrap, cholesterol, neoclassicism, pogey, wirelessultra- is a prefix occurring originally in loanwords from Latin, with the basic meaning“on the far side of, beyond.” In relation to the base to which it is prefixed, ultra- has the senses “located beyond, on the far side of” (ultramontane; ultraviolet), “carrying to the furthest degree possible, on the fringe of” (ultraleft; ultramodern), “extremely” (ultralight); nouns to which it is added denote, in general, objects, properties, phenomena,etc., that surpass customary norms, or instruments designed to produce or deal withsuch things (ultramicroscope; ultrasound; ultrastructure)
Examples of 'ultrabasic' in a sentence
ultrabasic
Meanwhile, clays are widely found in ultrabasic reservoirs.
Zijing Li, Jilong Guo, Zhao Dong, Jiawei Chen 2018, 'Insight into interactions of olivine-scCO2-water system at 140 °C and 15 MPa duringCO2 mineral sequestration', Geoscience Frontiershttp://www.sciencedirect.com/science/article/pii/S1674987117302207. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
We evaluated 55 multidimensional diagrams proposed during 2004-2013 for the tectonic discrimination of ultrabasic, basic, intermediate, and acid magmas.
Rivera-Gómez M. Abdelaly, Verma Surendra P. 2016, 'Testing of multidimensional tectonomagmatic discrimination diagrams on fresh and alteredrocks', Geologica Carpathicahttp://www.degruyter.com/view/j/geoca.2016.67.issue-2/geoca-2016-0013/geoca-2016-0013.xml?format=INT. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)
Analyses confirmed that this host rock, classified as ultrabasic, consists mainly of dolomite, calcite and diopside.
Aline Maria dos Santos Teixeira, Francisco M. S. Garrido, Marta Eloisa Medeiros, JoãoAlves Sampaio 2012, 'Caracterização e classificação quanto ao risco ambiental do estéril da mina de cromitado município de Andorinha, Bahia', Química Novahttp://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422012000900017&lng=en&tlng=en. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)