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Lecture 18

GEO 330 Lecture Notes - Lecture 18: Nakhlite, Lherzolite, Diogenite


Department
Geosciences
Course Code
GEO 330
Professor
Timothy Glotch
Lecture
18

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CI, CM, CO, CV, CK, CR, CH
Carbonaceous Chondrites
H, L, LL
Ordinary Chondrites
Rumuruti-Chrondrites
EH, EL
Enstatite-Chondrites
Undifferentiated Meteorites (Primitive)
Acapulcoites
Winonaites
Lodranites
Primitive Achondrites
Shergottites
Makhlites
Chassigny
SNC
ALH84001
Martian Meteorites
Aubrites
Ureilites
Angrites
Howardites
Eucrites
Diogenites
HED
Lunar Meteorites
Achondrites
Pallasites
Mesoiderites
Stony-Iron Meteorites
IA, IIA, IIB, IIIA, IIIB, IVA, others
Iron Meteorites (main groups)
Differentiated Meteorites
Meteorite Classification
Class of achondrite meteorites originated from Mars
Named after Shergotty, Nakhla, and Chassigny
Shergottites fall into several classes, but are basically basaltic rocks
Nakhlites are clinopyroxenites (mostly made of clinopyroxene (Ca-rich)
Chassignites are dunites (mostly made of olivine)
These meteorites all have crystallization ages of 1.3 Gy or younger
ALH84001 has a crystallization age of ~4.5Gy. It is an orthopyroxenite and is not classified as a
shergottite, nakhlite, or chassignite
NWA7034 is an impact breccia with an age of ~2Gy. Also not a shergottite, nakhlite, or chassignite
SNC Meteorites
Two main types of shergottites -- basalts and lherzolites
SNC Meteorites -- Shergottites
SNC Meteorites
Saturday, March 31, 2018
4:30 PM
GEO 330 Page 1
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