Table 2 MGM results of the four VNIS spectra.

From: Correlated compositional and mineralogical investigations at the Chang′e-3 landing site

Spectrum

CE3-0005

CE3-0006

Mineral

Centre

FWHM

Strength

Centre

FWHM

Strength

Olivine

884

138

−0.103

878

135

−0.026

 

1,134

139

−0.076

1,136

122

−0.073

 

1,248

291

−0.099

1,260

237

−0.059

HCP‡

1,029

144

−0.196

1,031

145

−0.179

 

2,236

337

−0.070

2,371

404

−0.099

LCP‡

948

110

−0.106

935

122

−0.091

 

1,971

240

−0.035

2,024

373

−0.051

HCP/LCP* (1 μm ratio)

1.8 (LCP/(LCP+HCP)≈0.35)

2.0 (LCP/(LCP+HCP)≈0.34)

HCP/LCP* (2 μm ratio)

2.0 (LCP/(LCP+HCP)≈0.33)

1.9 (LCP/(LCP+HCP)≈0.34)

HCP/OL† (1 μm/1.25 μm)

2.0 (OL/(OL+HCP)≈0.34)

3.0 (OL/(OL+HCP)≈0.25)

Spectrum

CE3-0007

CE3-0008

Mineral

Centre

FWHM

Strength

Centre

FWHM

Strength

Olivine

874

148

−0.038

870

136

−0.037

 

1,158

121

−0.045

1,123

146

−0.068

 

1,261

251

−0.053

1,234

268

−0.063

HCP‡

1,043

166

−0.175

1,017

142

−0.144

 

2,359

429

−0.145

2,224

395

−0.069

LCP‡

944

130

−0.076

932

111

−0.060

 

1,983

309

−0.065

1,965

271

−0.030

HCP/LCP* (1 μm ratio)

2.3 (LCP/(LCP+HCP)≈0.30)

2.4 (LCP/(LCP+HCP)≈0.29)

HCP/LCP* (2 μm ratio)

2.2(LCP/(LCP+HCP)≈0.31)

2.3 (LCP/(LCP+HCP)≈0.30)

HCP/OL† (1 μm/1.25 μm)

3.3 (OL/(OL+HCP)≈0.23)

2.3 (OL/(OL+HCP)≈0.30)

  1. *The HCP/LCP is the volume ratio of HCP to LCP, determined by the 1- and 2-μm band-strength ratio for the two phases. The normalized band-strength ratios, LCP/(HCP+LCP), indicating the fractions of LCP in the mixtures, are also given for references in brackets. The consistencies in LCP/(LCP+HCP)s for the 1- and 2-μm bands are important in showing that olivine and other mineral absorptions are not skewing the MGM results32.
  2. †The HCP/OL is the volume ratio of HCP to olivine, determined by the peak strength ratio for the two phases (1 μm peak of HCP versus ∼1.25 μm peak of olivine). The normalized band-strength ratios, OL/(HCP+OL), are also indicated in brackets.
  3. ‡Spectrally, HCP has the maximum absorption of the 1-μm feature located beyond 980 nm and the 2-μm feature, beyond 2,200 nm, whereas LCP has these features located at <980 nm and 2,200 nm, respectively.
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