| 释义 |
Definition of petrogenesis in English: petrogenesisnoun ˌpɛtrə(ʊ)ˈdʒɛnɪsɪs mass nounGeology The formation of rocks, especially igneous and metamorphic rocks. Example sentencesExamples - Most arc magmas have also undergone complex fractionation and contamination paths, which make attempts to quantify their petrogenesis difficult.
- The petrogenesis and tectonic setting of the supersuite, and cogenetic felsic volcanic rocks, has been discussed in some detail by Griffin et al..
- The petrogenesis of igneous rocks in the Albany-Fraser Province is not well constrained, although U-Pb zircon geochronology establishes that most granitic protoliths were not tectonically reworked Yilgarn Craton.
- Some back-arc basalt samples from the East Scotia Sea have high alumina characteristics, suggesting the involvement of subduction-modified mantle sources in their petrogenesis.
- Petrogenesis Igneous petrogenesis is the process or set of processes by which igneous rocks are formed.
Derivatives adjective Geology The Sogneskollen Granitic Complex is Rb-poor while Sr, Ba and NaO show rather large abundances; these have important petrogenetic implications if they represent the magmatic concentrations. Example sentencesExamples - It thus appears that melting of quartzofeldspathic rocks with greywacke-like bulk composition in the presence of a water-bearing fluid phase may be an appropriate petrogenetic model for the Sogneskollen Granitic Complex.
- As for so many cases in the Earth sciences, the igneous geologist has to work back in time using all available field, geochemical, and experimental data to construct a viable petrogenetic history for any particularly igneous rock.
- Zircon is an important phase for the petrogenetic interpretation as all the separated grains have rounded, detrital cores with thin euhedral overgrowths.
- The revised age for the Jozini Formation rhyolites is also of significance for petrogenetic models proposed for the Karoo silicic magmatism.
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