WebDownload scientific diagram Poikilitic and contamination textures in carbonatites (a-c falsecolor BSE images, SB 50 μm; d-f BSE images, SB 0.5 mm). a Dolomite oikocryst containing inclusions of ... WebFeb 24, 2024 · Northwest Africa (NWA) 6342 is an intermediate, poikilitic shergottite, found in Algeria in 2010. It is comprised of two distinct petrographic areas; poikilitic domains with rounded Mg-rich olivine chadacrysts enclosed by large low-Ca pyroxene oikocrysts, and a nonpoikilitic domain mainly comprised of subhedral olivine and …
Poikilitic Definition & Meaning Dictionary.com
WebOphitic texture, a variant the poikilitic texture, is one where random plagioclase laths are enclosed by pyroxene or olivine. If plagioclase is larger and encloses the ferromagnesian minerals, then the texture is subophitic and the laths typically impinge on one another to form sharp angles. Note that the change from intergranular through ... WebPoikilitic eudialyte outcrops in a strongly peralkaline phonolithic cumulo-dome in Jabal Al Hasawinah, Libya. Textural relationships reveal that the eudialyte has formed at a very late stage of the rock petrogenesis. Electron microprobe analyses confirm its volatile (hydrous) nature and low REE content. lightning mcqueen and the magic highway
Poikilitic Definition & Meaning - Merriam-Webster
WebThe poikilitic lithology is defined by equant, rounded olivine and chromite chadacrysts contained within, and completely surrounded by mm-size pigeonite oikocrysts with thick, irregular rims of augite (up to 9 mm; Fig. 1). The olivines (150–600 μm across) are dispersed within the oikocrysts and are not in contact with each other. Webpoikilitic texture, and equigranular versus porphyritic textures in terms of material properties and physical conditions through the number density of crystals. In Appendices A-C, the detailed derivations of the equa- tions for moments of crystal size distribution function and of scaling relation for number density are presented. WebIn analogy to lunar poikilitic rocks and lithic fragments, poikilitic lithic fragments in LL‐group chondrites, i.e., meteorites which are highly brecciated due to repeated … peanut butter lollipops for dogs