geobarometern.

Brit.

/ˌdʒiːə(ʊ)bəˈrɒmᵻtə/, U.S.

/ˌdʒioʊbəˈrɑmədər/

Origin: Formed within English, by compounding. Etymons: geo- comb. form, barometer n.

Etymology: < geo- comb. form + barometer n. In sense 1 after German Geobarometer (F. W. Pfaff 1890, in Zeitschr. der Deutschen Geol. Gesellsch. 42 303, who attributed the term to his father). With sense 2 compare geothermometer n. 2.

Geology.

1. An apparatus for measuring pressure within the earth. rare (now disused).

ΚΠ

1928 M. Cobb tr. R. Ambronn Elements Geophysics ii. 14 A number of other proposals for making such relative measurements possess now only historical value, as the apparatus of Perrot.., Pfaff's spring apparatus (geobarometer), [etc.].

2. A mineral or mineral assemblage whose chemical composition or stability range is sensitive to pressure, so it may be used as a guide to the pressure under which the rock containing it was formed.

ΚΠ

1960 Bull. Geol. Soc. Amer. 71 1844 Investigations in the Fe-As-S system indicate that arsenopyrite may serve as a geobarometer.

1988 N.Z. Jrnl. Geol. & Geophysics 31 199 The garnet-orthopyroxene-plagioclase geobarometer..indicates a metamorphic pressure of 6.3 kbar at 800°C.

2005 M. Bjornerud Reading Rocks ii. 46 A mineral like diamond, whose formation depends mainly on pressure, is a good geobarometer, providing a measure of the rock's depth at the time that the mineral was formed.

This is a new entry (OED Third Edition, March 2012; most recently modified version published online March 2022).

单词	geobarometer
释义	geobarometern. Brit. /ˌdʒiːə(ʊ)bəˈrɒmᵻtə/, U.S. /ˌdʒioʊbəˈrɑmədər/ Origin: Formed within English, by compounding. Etymons: geo- comb. form, barometer n. Etymology: < geo- comb. form + barometer n. In sense 1 after German Geobarometer (F. W. Pfaff 1890, in Zeitschr. der Deutschen Geol. Gesellsch. 42 303, who attributed the term to his father). With sense 2 compare geothermometer n. 2. Geology. 1. An apparatus for measuring pressure within the earth. rare (now disused). ΚΠ 1928 M. Cobb tr. R. Ambronn Elements Geophysics ii. 14 A number of other proposals for making such relative measurements possess now only historical value, as the apparatus of Perrot.., Pfaff's spring apparatus (geobarometer), [etc.]. 2. A mineral or mineral assemblage whose chemical composition or stability range is sensitive to pressure, so it may be used as a guide to the pressure under which the rock containing it was formed. ΚΠ 1960 Bull. Geol. Soc. Amer. 71 1844 Investigations in the Fe-As-S system indicate that arsenopyrite may serve as a geobarometer. 1988 N.Z. Jrnl. Geol. & Geophysics 31 199 The garnet-orthopyroxene-plagioclase geobarometer..indicates a metamorphic pressure of 6.3 kbar at 800°C. 2005 M. Bjornerud Reading Rocks ii. 46 A mineral like diamond, whose formation depends mainly on pressure, is a good geobarometer, providing a measure of the rock's depth at the time that the mineral was formed. This is a new entry (OED Third Edition, March 2012; most recently modified version published online March 2022). < n.1928
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