The layered structure model for winonaite parent asteroid implicated by textural and mineralogical diversity

Earth, Planets and Space

Table 1 Modal abundance of minerals in winonaites (by area, vol%)

Samples	Opx	Ol	Pl	Cpx	Php	Tro	Chr	Metal^a	Other^b	Silicate	Opaque	References
NWA 725	40.3	11.8	10.1	5.0	0.7	10.3	0.9	21.0	–	67.9	32.2	This work
NWA 6448	53.8	19.7	11.5	2.3	1.0	3.5	0.2	8.0	–	88.3	11.7	This work
GRV 022890	39.4	23.0	15.4	6.8	–	6.4	1.0	8.1	tr	84.6	15.5	This work
GRV 021663	27.5	49.5	1.7	5.7	tr	4.5	0.5	10.7	–	84.3	15.7	This work
NWA 4024	7.5	3.7	4.2	1.3	1.0	1.8	–	80.5	–	16.7	82.3	This work
SAH 02029	37.8	34.6	6.4	3.5	–	2.3	0.0	15.4	0.0	82.3	17.7	This work
NWA 8614	44.3	12.3	10.1	4.6	0.7	6.9	0.4	20.4	0.4	71.3	27.7	Farley et al. (2015)
NWA 1463	48.8	10.4	6.4	8.7	0.4	8.8	0.3	16	0.1	74.3	25.1	Hunt et al. (2017)
Pontlyfni	33.4	13.7	14.2	3.1	–	21.0	–	12.9	2.1	64.4	33.9	Hunt et al. (2017)
Fortuna	39.1	24.7	16.3	4.6	0.3	7.1	0.2	7.67	–	84.7	15.0	Hunt et al. (2017)
Winona	32.4	16.7	19.5	2.2	0.4	5.8	0.1	28.7	tr	70.8	34.6	Hunt et al. (2017)
Mt. Morris	30.1	10	15.5	0.2	–	5.2	tr	38.2	0.7	55.8	43.4	Hunt et al. (2017)
HaH 193	36.1	17	13.6	1.9	0.1	3.1	tr	26.6	1.6	68.6	29.7	Hunt et al. (2017)
GRV 021663^c	17	56	1.4	8	0	–	–	–	–	82.4	17.0	Li et al. (2011)
Tierra Blanca	32.7	27.6	10.2	0.2	0.1	3.8	0.0	25.5	0.0	70.7	29.3	Yugami et al. (1998)
Y-75300	51.2	16.6	10.3	0.0	–	18.8	–	2.3	1.0	78.1	21.1	Kimura and Tsuchiyama (1992)
Y-74025	45.6	19.9	8.3	7.2	–	13.5	–	3.9	1.6	81.0	17.4	Kimura and Tsuchiyama (1992)
Y-75305	45.0	7.8	8.3	1.2	–	9.2	0.2	27.0	1.3	62.3	36.4	Kimura and Tsuchiyama (1992)
Y-8005	28.4	11.8	13.5	6.2	0.0	7.2	0.0	31.7	1.1	59.9	38.9	Yugami et al. (1998)
NWA 1058	18.8	33.8	9.6	6.4	1.2	7.0	0.4	20.1	–	68.6	27.5	Cecchi and Caporali (2015)
QUE 94535	41.3	24	14.8	2.9	–	6.6	tr	9.76	0.7	83.0	16.4	Hunt et al. (2017)

Opx orthopyroxene, Ol olivine, Pl plagioclase, Cpx clinopyroxene, Php phosphate, Tro troilite, Chr chromite, tr trac, “–” not analyzed or not detected
^aMetal includes Fe-rich weathering products produced from both metal and/or troilite
^bOther includes the accessory minerals (e.g., schreibersite, daubreelite, amphibole, alabandite, and graph)
^cThis modal mineralogy was estimated using BSE images and X-ray element maps. Different analysis areas could affect the estimate results