Titlebook: Origins of Igneous Layering; Ian Parsons Book 1987 Springer Science+Business Media Dordrecht 1987 chemistry.formation.igneous rock.mineral

狂熱語(yǔ)言

Layering and Related Structures in the Duke Island and Skaergaard Intrusions: Similarities, Differesorting and grading and resembles bedding in sandstones. Both olivine and pyroxene are sorted by size, but the olivine crystals are generally finer, so tend to be concentrated in the tops of layers and between laminae of coarser pyroxene. The other layering type, developed exclusively in coarse-grai

凈禮

細(xì)微的差異

,The Organization and Internal Structure of Cyclic Units in the Honningsv?g Intrusive Suite, North Nompleted, reduced and interrupted sequences are recognized in which there are departures from the ideal unit. Cyclic units are stacked in mutual contact and separated by sharp, regressive discontinuities. Phase contacts within some units are discordant to unit boundaries such that lithological layer

現(xiàn)代

The Formation of Stratiform PGE Deposits in Layered Intrusions,yers, that the sulfides and host rocks were deposited simultaneously..It is proposed that the cyclic units are the consequence of periodic influx of new, primitive magma, that the sulfides segregated in response to magma mixing during influx, and that turbulent convection within the influxes gave th

字謎游戲

The Development of Compositional and Textural Layering in Archaean Komatiites and in Proterozoic Ko a decreasing solidification rate. The peridotite grades upwards into an olivine clinopyroxenite, clinopyroxenite, pyroxene-rich ophitic gabbro to subophitic gabbro, leucogabbro and ferrogabbro sequence. Pyroxene-rich ophitic gabbro forms the lowermost unit of the Blindbat Flow. Plagioclase had a ne

紳士

愛花花兒憤怒

Constitutional Zone Refining of Layered Intrusions,icient fractionation occurs when the amount of melt increases rapidly and the system passes through frequent cycles. Trace elements are fractionated at different rates than they would be by most other mechanises of differentiation. If the remelted zone periodically becomes unstable and mixes with th

祖?zhèn)?/a>

諷刺滑稽戲劇

旁觀者

Solidification Contraction: Another Approach to Cumulus Processes and the Origin of Igneous Layeringive rise to a marginal, inverse compositional zonation. If the refractory growth sector at the front of the crystal pile seals off the underlying volume, a discontinuous fluid dynamic situation will develop, which prevents refractory crystal growth until precipitation of another crystal pile has re