Earth, Planets and Space

Table 2 Concentrations with standard deviations obtained for matrix, magnetite (mag) and pyrrhotite (pyh)

From: Trace-element analysis of mineral grains in Ryugu rock fragment sections by synchrotron-based confocal X-ray fluorescence

	#1	#6	#2	#3	#5	#14	#11
	Matrix	Matrix	Magnetite	Magnetite	Magnetite	Magnetite	Pyrrhotite
\(\uprho\)(g/cm³)	1.73–2.11	1.73–2.11	5.2	5.2	5.2	5.2	4.58–4.79
\({\mathrm{T}}^{\mathrm{grain}}\)(µm)	/	/	14–17	14–17	14–17	10–14	27–30
Si	10.7^†	10.7^†	nd	nd	nd	nd	nd
S	5.35^†	5.35^†	nd	nd	nd	nd	41.33^⁑ ± 0.39^⁑
Ca	0.922^†	0.922^†	nd	nd	nd	nd	nd
Ti	0.10^* ± 0.01^*	0.06^* ± 0.01^*	0.37^* ± 0.07^*	0.36^* ± 0.07^*	0.36^* ± 0.08^*	0.23^* ± 0.06^*	0.44^* ± 0.11^*
V	35 ± 25	91 ± 23	76 ± 63	nd	nd	nd	nd
Cr	0.21^* ± 0.02^*	0.35^* ± 0.04^*	0.13^* ± 0.04^*	0.51^* ± 0.07^*	0.07^* ± 0.03^*	nd	0.30^* ± 0.05^*
Mn	457 ± 57	630 ± 76	202 ± 59	649 ± 102	672 ± 111	2.35^* ± 0.38^*	547 ± 92
Fe	18.5^†	18.5^†	72.36	72.36	72.36	72.36	53.98^⁑ ± 0.51^⁑
Co	0.18^* ± 0.03^*	0.06^* ± 0.01^*	328 ± 68	698 ± 109	655 ± 106	163 ± 95	0.14^* ± 0.02^*
Ni	1.08^†	1.08^†	nd	nd	nd	nd	3.73^⁑ ± 0.75^⁑
Cu	41 ± 8	69 ± 12	391 ± 117	516 ± 143	443 ± 136	nd	89 ± 24
Zn	69 ± 12	231 ± 40	669 ± 169	820 ± 199	726 ± 188	619 ± 291	36 ± 13
Ga	4 ± 1	8 ± 2	20 ± 7	12 ± 7	23 ± 10	27 ± 11	13 ± 5
Ge	8 ± 2	17 ± 4	34 ± 10	28 ± 10	32 ± 11	55 ± 18	12 ± 4
As	nd	nd	nd	nd	16 ± 5	nd	9 ± 3
Se	12 ± 3	11 ± 3	14 ± 5	17 ± 5	20 ± 6	13 ± 4	70 ± 20
Sr	nd	nd	nd	nd	nd	nd	nd
Y	nd	nd	nd	nd	nd	nd	nd
Others	62.90^* ± 0.06^*	62.87^* ± 1.38^*	26.97^* ± 0.13^*	26.50^* ± 0.18^*	26.95^* ± 0.14^*	24.97^* ± 0.41^*	0^* ± 0^*

For the Fe concentration in magnetite it was preferred to use its stoichiometric value as the SEM–EDX quantification of O is less reliable. Data in ppm, except for the asterisk (*) representing data in wt%, the double asterisk (⁑) representing SEM–EDX data in wt% and the dagger (†) representing CI chondrite composition data from Lodders, 2010 in wt%. nd = not detected

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