Tile C2009, Track 77

Track overview after squishing and prior to acrylic embed. (Particle links are active.)


Track overview after acrylic embed. (No links.)



Elemental abundance chart from the XRF: (x means this element shows up strongly in one of the XRF images.)

Particle #	Fe	Ca	Ti	Cr	Mn	Ni
1	X			X		X
2	X			X		X
3	X			X		X
4	X			X		X
5	X	X	X	X
6	X			X		X
7	X			X
8	X	X	X
9	X	X	X	X	X
14	X
16	X					X
17	X					X
19	X
20	X					X
22	X					X
23	X	X	X	X
24	X
25	X					X
27	X			X		X

XANES Families:
The XANES spectra of the particles in Track 77 showed several distinct families. The families are arbitrarily numbered. The particles in each family are:

Family 1:    2.
Family 2:    1 and 3.
Family 3:    4, 5 and 7 (and/or 26).
Family 4:    11, 14, 15, 16, 17, 19, 27 (aka not 21).
Family 5:    23.

Mineral name [XANES Type = Percentage](Particle #) The percentage is the closeness of the match -- 60% means that 3/5 of the best fit used this mineral.

Family 1 yields the following best fit minerals: Kamacite [FeXANES](2).

Family 2 yields the following best fit minerals: Fo60 [FeXANES](3).

Family 3 yields the following best fit minerals: Fo40 [FeXANES=87%](4), Pyrite[FeXANES=13%](4), Diopside (5), Anorthite [Ca](7), Fo40 [FeXANES=87%](7), Pyrite [FeXANES=13%](7), Fo20 [Fe](7).

Family 4 yields the following best fit minerals: Mauna Loa [Fe=80%](11), Pyrite [Fe=20%](11), Fe2O3 [Fe=50%](14), Pyrrhotite [Fe=50%](14), Ferrihydrite [Fe=40%](15), Mauna Loa [Fe=20%](15), Pyrite[20%](15), Mauna Loa [Fe=50%](17), Fe2O3 [Fe=33%](17), Pyrite [Fe=17%](17), Pyrrhotite [Fe=80%](27), Mauna Loa [Fe=20%](27).

Family 5 yields the following best fit minerals: Fo80 [FeXANES=60%](23), Indochinite[FeXANES=33%](23), Mauna Loa [FeXANES=10%](23).


Additional images of the track:

Darkfield image showing up possible sulfides.
Particle zoomins.
XRF Stero Pair.
XRF Map: Fe(red)Mn(green)Cr(blue).
XRF Map: Fe(red)Ca(blue).
XRF Map: Fe(red)Ca(green)Ti(blue).
XRF Map: Fe(red)Cr(green)Ni(blue).