Supplementary data 4. Compositions (wt.%) of olivine from selected samples in the Xiaohekou complex
Rock type
sample No.	SiO2	TiO2	Al2O3	FeO	MnO	MgO	CaO	Na2O	K2O	NiO	Total	Fo
(%)	
Pyroxenite/06XH03-2	
	37.40	0.03	0.04	22.61	0.31	39.07	N.D.*	0.00	0.00	0.19	99.65	75	
	37.48	0.03	0.03	22.45	0.31	39.10	N.D.	0.01	N.D.	0.20	99.61	76	
	37.70	N.D.	0.01	22.32	0.29	39.09	0.01	0.02	0.00	0.18	99.62	76	
	37.11	0.04	0.03	22.42	0.34	39.18	0.01	N.D.	0.01	0.20	99.34	76	
	37.19	0.07	0.05	22.50	0.33	38.87	N.D.	N.D.	N.D.	0.20	99.21	75	
	37.66	0.01	0.04	21.81	0.30	39.23	0.01	0.01	0.01	0.22	99.30	76	
	37.66	0.02	0.06	21.96	0.34	39.16	N.D.	N.D.	N.D.	0.19	99.39	76	
	37.62	0.03	0.03	22.25	0.28	39.13	0.02	0.04	0.01	0.21	99.62	76	
	37.31	0.01	0.06	22.13	0.32	39.11	N.D.	0.02	N.D.	0.21	99.17	76	
	37.60	0.06	0.05	21.97	0.30	39.18	0.02	N.D.	0.01	0.21	99.40	76	
	37.64	0.05	0.04	22.25	0.29	39.16	N.D.	0.03	N.D.	0.22	99.68	76	
	37.49	0.02	0.02	22.17	0.30	38.99	N.D.	0.03	N.D.	0.19	99.21	76	
	37.32	0.01	0.03	22.28	0.38	39.01	N.D.	0.02	0.00	0.20	99.25	76	
	37.28	0.03	0.01	22.40	0.28	38.95	N.D.	N.D.	0.02	0.24	99.21	76	
Gabbronorite/06XH02-7	
	38.27	0.03	0.04	19.05	0.24	41.57	0.01	N.D.	N.D.	0.27	99.48	80	
	38.01	0.02	0.03	18.81	0.29	41.71	N.D.	0.03	N.D.	0.31	99.21	80	
	38.33	0.01	0.04	18.81	0.29	41.90	0.01	N.D.	N.D.	0.27	99.66	80	
Olivine gabbronorite dyke/XH11-5	
	37.12	0.03	0.06	26.46	0.34	35.92	0.02	0.02	0.01	N.A.†	99.98	71	
	37.69	0.03	0.03	25.53	0.31	36.29	0.01	0.01	N.D.	N.A.	99.90	72	
	37.49	0.08	0.02	25.74	0.32	36.08	0.02	0.00	N.D.	N.A.	99.75	71	
	37.39	0.06	0.07	26.43	0.34	35.42	0.01	0.00	0.00	N.A.	99.72	70	
	37.53	0.04	0.05	26.29	0.33	35.38	N.D.	N.D.	N.D.	N.A.	99.62	71	
#N.D. = not detected.
†N.A. = not analyzed.