2023年11月1日 · We present chemical profiles across zoned clinopyroxene grains from the CE5 basalts and a lunar basalt meteorite NWA 4898, in combination with previously published data, …

2016年7月16日 · The notion that pyroxenites—olivine-poor lithologies dominated by pyroxene under upper mantle conditions—play a significant role in basalt genesis is supported by …

A basalt is a fine-grained basic igneous rock containing essential calcic plagioclase feldspar and pyroxene (usually Augite), with or without olivine. Basalts can also contain quartz, hornblende, …

Ca-poor pyroxene is a critical mineral in basalt classification, its presence signifying tholeiitic basalt, and its absence usually implying alkali basalt. Olivine is another critical mineral in …

2019年8月16日 · Application of pyroxene 40 Ar/ 39 Ar dating to terrestrial basalts represents an important technical breakthrough, and we report the first successful result for a Precambrian …

Basalt in the generic sense = plagioclase + clinopyroxene +/- (olivine, nepheline, hypersthene, quartz, melilite, magnetite). The basalt tetrahedron is a useful tool for classifying basalts. The …

ALTERATION PRODUCTS OF OLIVINE AND PYROXENE 57 curve of Deer and Wager (1939). There is a considerable variation on the extent of alteration from one flow to another and in the …

2016年6月1日 · Pyroxene and olivine are the two major rock-forming minerals that commonly used to distinguish peridotite from pyroxenite. Garnet could control the major-element …

We describe an enriched high-Ti basalt clast in lunar meteorite NWA 1428, an incompatible trace element-poor feld-spathic breccia, and then present detailed petrological and geochemical …

The mineral chemistry of several Pliocene alkali basaltic rocks from Burgenland and Styria (Eastern Austria) have been investigated in order to determine the evolution path of the basalt …