Moon rocks

Moon rocks

(lunar rocks) Samples of the Moon returned by Apollo and Luna spacecraft. Lunar soils, or fines, consist of glasses, aggregates, and meteorite debris in addition to recognizable fragments of larger rock types. Hand specimens include mare basalts (low titanium content from the western maria, high titanium content from the eastern maria, and aluminous basalts from Mare Fecunditatis), non-mare basalt (also known as KREEP because of its high content of potassium (symbol K), rare earth elements, and phosphorus (symbol P)), and anorthositic rocks from the highlands. Rare lunar-rock types include granite, ultramafic green glass, pyroxenite, norite, troctolite, and dunite. Most highland rocks have been impact metamorphosed (to produce cataclastic, recrystallized, and impact melt textures), but cumulates are also observed and these date back to the formation of the first lunar crust.

Lunar rocks are depleted in volatile and siderophile elements. Strong correlations exist between elements that are geochemically similar to one another (e.g. iron and manganese) or that are both excluded by major minerals (e.g. potassium and lanthanum). The major lunar minerals are calcic plagioclase, clino- and ortho-pyroxene, olivine, and ilmenite. Minor phases include spinels, K-feldspar, troilite, metallic iron, quartz, tridymite, cristobalite, apatite, and whitlockite. Uniquely lunar minerals include armalcolite, tranquillityite, and pyroxferroite. No hydrated phases, highly oxidized minerals, diamonds, or mineralization have yet been found.

References in periodicals archive ?
One of the primary objectives of the mission was to return samples of Moon rocks to Earth.
That was complete in about six months as the Soviets raced to preempt the United States, including an unsuccessful June launch with a mission to grab moon rocks and study the lunar gravitational field.
Thanks to the Apollo astronauts and the curators at NASA, researchers such as myself -- who weren't even born when the Apollo Moon landings took place -- are still able to study Moon rocks and feel part of a shared historical A-adventure.
Birmingham Museums Trust is ready for a rocking summer - from rock music fun at Birmingham Museum & Art Gallery (BMAG), to moon rocks at Thinktank, Birmingham Science Museum, where they are celebrating the 50th anniversary of the first moon landing, there's lots to see and do.
So I explained again how one can easily explain the above issues, and I added two solid proofs of the moon landing: The existence of close to 400 kilograms of moon rocks that have been analyzed and shown to be from the moon, and the analysis of images of the trajectory that we see the dust taking when kicked up by the moon rover's wheels.
For the first time in decades, NASA is about to open some pristine samples of moon rocks and dirt collected by Apollo astronauts.
A search has started for moon rocks in Oman, headed by the Public Authority for Mining.
The project will consist of studies and preparations for the mission, which seeks to extract Moon rocks and regolith. 
In 1973, President Nixon sent 135 fragments of moon rock, collected during the Apollo 17 mission, to governments around the world and to all 50 American states, coining them "goodwill moon rocks." These small rocks were encased in acrylic and mounted on a plaque with the recipient country's flag.
This new vision of Earth's natural satellite comes from an improved analysis of gases trapped in the Moon rocks gathered during the Apollo mission, as well as detailed measurements of lunar features obtained by recent orbiter missions.
In 1976, I requested from NASA a special collection of three moon rocks. NASA had offered to send them to U.S.
Examining moon rocks collected in 1971, one team of researchers has calculated the age of the moon, while another has proposed a new theory on how the moon was formed.