neutron—gamma sonde An instrument package for measuring the amount of hydrogen present within the rocks surrounding a borehole. The sonde contains a neutron source and a gamma-ray detector. The gamma rays induced in the rocks by neutron bombardment are proportional to the amount of hydrogen present. The device can be used to determine the porosity of the surrounding rocks.
More From encyclopedia.com
Igneous Rocks , Igneous rocks are formed by the cooling and hardening of molten magma. The word igneous comes from the Latin word igneus, meaning fire, and there are… Iron Ores , Rocks Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… Country Rock , Country rock The term country rock refers to a body of rock that receives or hosts an intrusion of a viscous geologic material. Intrusions into count… Rock , rock1 / räk/ • n. 1. the solid mineral material forming part of the surface of the earth and other similar planets, exposed on the surface or underly… xenolith , xenolith An inclusion or enclave of a preexisting rock in an igneous rock. Xenoliths are often derived from the country rocks that have been invaded… Initial Strontium Ratio , initial strontium ratio (common strontium) Strontium has four naturally occurring isotopes: 88Sr; 87Sr; 86Sr; and 84Sr. Of these, 87Sr is perhaps the…
About this article
Updated About encyclopedia.com content Print Article
You Might Also Like