Picrite basalt - Wikipedia
Picrite basalt or picrobasalt is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. It is dark with yellow-green olivine phenocrysts (20-50%) and black to dark …
Picrite | Igneous, Basaltic, Olivine | Britannica
The term picrite-basalt is reserved for feldspar-poor basalts rich in olivine. The minerals in picrite are, in many cases, altered. Serpentine partially or wholly replaces olivine, and hornblende, …
Picrite - an overview | ScienceDirect Topics
Picrite-basalt or picrobasalt is a variety of high-magnesium olivine-rich basalt. It is dark with yellow-green olivine phenocrysts (20–50%) and black to dark brown pyroxene, mostly augite. …
The Tarim picrite–basalt–rhyolite suite, a Permian flood basalt …
2010年1月22日 · The picrite–basalt–rhyolite suite from the NTU, together with Permian volcanic rocks from elsewhere Tarim basin, constitute a Large Igneous Province (LIP) that is …
Picrite - SpringerLink
The term oceanite (picrite-basalt) has been used to describe picrites that have been derived directly from basalts through magmatic accumulation of olivine by crystal settling. Olivine-rich …
Mineralogy and geochemistry of picro-dolerite dykes from the …
2017年10月23日 · Constituent mineral compositions and whole rock major element geochemistry of picro-dolerite dykes from the central part of the Deccan flood basalt province are presented …
Picrite-basalt | rock | Britannica
basalt, extrusive igneous (volcanic) rock that is low in silica content, dark in colour, and comparatively rich in iron and magnesium. Some basalts are quite glassy (tachylytes), and …
Picrite - Natural Atlas
Picrite basalt or picrobasalt is a variety of high-magnesium olivine basalt that is very rich in the mineral olivine. It is dark with yellow-green olivine phenocrysts (20-50%) and black to dark …
High-magnesium picrite–basalt associations of the Tunka …
2013年2月1日 · High-Mg metabasalts and metapicrites discovered within the Urtagol Formation in the central zone of the Tunka bald mountains (East Sayan) are studied. In geochemistry the …
Geochemistry of the Yumen picrites-basalts from the Emeishan …
2021年11月1日 · The studied volcanic rocks comprise three rock types: picrite, basalt, and basaltic andesite (Fig. 2). The picrites contain 19.7–21.6 wt% MgO, 8.1–8.6 wt% Al 2 O 3 , …