70035 Ilmenite Basalt
 >View Microscope
Fact sheet
Description: 

70035 is a vesicular, medium–grained, hypidiomorphic, granular high-Ti basalt with large anhedral clinopyoxene enclosing armalcolite, ilmenite, ulvöspinel and chrome spinel. The ilmenite content approaches 20%. Interstitial plagioclase encloses ilmenite and olivine. The groundmass includes cristobalite, K-feldspar, tranquillityite, ilmenite, ulvöspinel, troilite and pale brown granitic glass.

Our thin section consists of phenocrysts of olivine and ilmenite in a groundmass of fan-shaped intergrowths of plagioclase and pyroxene.

The sample weighed 5765 grams before analysis and is 3.82±0.06 billion years old (Rb/Sr).

Further details of this and other Apollo samples are here: http://curator.jsc.nasa.gov/lunar/

The thin section is slightly thick so between crossed polars some plagioclase crystals are yellow instead of shades of grey. It has also been used for laser analysis and the pits produced appear as black circles.

In Place
In Time
Accuracy:
Timescale:
Not known
Ma = Millions of years ago
In Focus
Collection:
What\
Type:
Type: 
igneous
What\
Rock-forming minerals:

Rock forming mineral:

What\
Accessory minerals:

Accessory minerals:

What\