Diabase dikes have been extensive but scattered and have green to brown colors that have plagioclase, clinopyroxene
and opaque mineral.
Lavas from SER contain variable abundances of plagioclase, clinopyroxene
and olivine phenocrysts, commonly in glomeroporphyritic clusters.
The presence of tremolite, calcic clinopyroxene
and plagioclase porphyroblasts cross cutting [S.
Assay results from auger sampling conducted on Susie Mountain has defined a platinum anomaly in basal mineral soils derived from clinopyroxene
The most abundant minerals found were olivine, clinopyroxene
, and orthopyroxene.
Pearce element ratio plots indicate that plagioclase and clinopyroxene
crystallization are responsible for the observed major element variation.
Anderson at the California Institute of Technology in Pasadena contends the transition zone holds both olivine and a high concentration of eclogite -- a rock made of garnet and clinopyroxene
Dykes vary from undeformed with relatively unaltered plagioclase and pyroxene, to intensely altered and dominated by actinolitic amphibole and/or chlorite instead of clinopyroxene
Typical high temperature non magnetic minerals found in pyrometamorphic rocks associated with coal combustion appear to include several Fe and Al rich clinopyroxene
, melilita, cristobalite, tridymite, mullite, cordierite and fayalite solid solutions, as well as glass (Foit et al.
Platinum/palladium ratios are near 1 which clearly differentiates this magnetite in clinopyroxene
hosted mineralization from the chromite in dunite hosted mineralization that has much higher platinum/palladium ratios.
These spherules are unusual for the K-T boundary because they are the first found to contain clinopyroxene
, a mineral rich in magnesium and calcium.
The quartz content is higher than in the gabbroic rocks and the main mafic mineral is hornblende rather than clinopyroxene