Appendix BDetailed petrographi pro�le

25547

56

50

50

4946

4859

46IVIII

II

I

V

VI

46 strike, dip of compositional banding

profile segment

grt-pyroxenite layer

peridotite outcrop

IV

Legend

Lithology dunite

spl-dunite varying amounts

spl-grt-dunite of cpx and opx

grt-dunite / grt-harzburgite

pyroxenite & websterite

dunite with bands of gr- pyroxenite

Weathering yellow

semi-brown

brown

Minerals cpx(matrix) (occurrance of 1 vol%)

opx (occurrance of 1 vol%)

opx (uncertain)

grt (purple) (appearance)

grt (green) (appearance)

grt / pseudomorphs after grt (mm-scale)

grt / pseudomorphs after grt (mm-cm-scale)

grt / pseudomorphs after grt in clusters

patches of cpx(recryst.)+spl(recryst.)

ps(grt) pseudomorphs after grtcpx(m) cpx matrix grains (single)spl(r) recrystallized spl grains (assembled)grt(p) grt(purple)grt(gn) grt(green)

compositional layering

20 modal estimate of a component

Colour coding

Structural coding

Abbreviations

Scale

³

³

S2

DETAILED PETROGRAPHIC PROFILE, UGELVIK-EAST PERIDOTITE BODY

(based on field observations)

Overview

10 5 0 50 m

20 10 0 100 cm

256 B. DETAILED PETROGRAPHIC PROFILEI

olgrt(p)cpx(m)

88102

mm-(cm-)scale (exsolutions of cpx)stretched || S2 (cpx-)grt-dunite

olgrt(p)cpx(m)

76204 (cpx-)grt-dunite

olgrt(p)cpx(m)

9010

257

I

II

olps(grt)spl(m)cpx(r)

92431

slightly gradual change in kelyphite vs. cpx(r)

spl-dunite

olgrt(p)cpx(m)opx

7920

258 B. DETAILED PETROGRAPHIC PROFILE

II

III

no outcrop

ol

spl(m)spl(m+r)opx

ps(grt)cpx(r)

9422

259

III

IV

no outcrop

olps(

spl(r)pyx(r)

grt)spl(m)

spl-dunitemm-scale lenses of spl(r)+pyx(r) intergrowth

961111

ol

spl(r)cpx(r)

grt(gn)spl(m)

spl-grt-dunite

mm-scale, corona of kelyphite and +/- spl(r)+cpx(r)gradient in spl(m) and cm-scale patches ofspl(r)+cpx(r) close to the lower contact

9010

260 B. DETAILED PETROGRAPHIC PROFILE

IV

V

no outcrop

olps(grt)

cpx(r)spl(r)

spl(m)

spl-dunite

grt replaced by cpx(r) + spl(r)953221

olps(grt)

spl(r)spl(m)

cpx(r)

spl-dunite

grt replaced by cpx(r) + spl(r)935322

261no outcrop

olopx(m)spl(m) ( spl-duniteopx-)

massive, indistinct oblique toS S3 29451

olps(grt)cpx(r)spl(m+r) spl-dunite

aligned, grt replaced by kelyphite and cpx(r) + spl(r)93543

olopx(m)spl(m) ( spl-duniteopx-)

massive, indistinct oblique toS S3 29451

olps(grt)spl(m)spl(r)cpx(r) spl-dunite

aligned, grt replaced by kelyphite9451

262 B. DETAILED PETROGRAPHIC PROFILE

V

VI

( spl-duniteopx-)

olgrt(p)opx(m)spl(m)

mm-scale, dotted distribution, strongly kelyphitizedcpx as inclusions in kelyphite

91531

(2pyx-)grt-dunite

olgrt(p)opx(m)cpx(m)

mm-(cm-)scale, thin kelyphite rims821233

spl-dunite

olspl(m+r)cpx(r)

stretched lenses of kelyphite and cpx(r)+spl(r) || S2

9343

(cpx-)grt-dunite

olgrt(p)cpx(m)

mm-scale, thin kelyphite rims, often surrounded by cpx85123

(opx-)grt-dunite

olgrt(p)opxcpx(m)spl

mm-scale, thin kelyphite rims, dotted distribution,centre grt-free

9622

263

VI

(opx-)dunite

olopxps(grt)spl

homogeneous

grt(v) replaced by kelyphite

9721

264 B. DETAILED PETROGRAPHIC PROFILEI

I

II

II

III

III

IV

IV

V

V

VI

VI

Summary:

lithology cpx(m) opx grt

samples

DS0253

DS0254

DS0255

DS0256

DS0257

DS0258

DS0259DS0260DS0261

DS0263

DS0264DS0265

DS0266

DS0267

DS0268DS0269

DS0270DS0271DS0273DS0272DS0274DS0275DS0276

DS0277

DS0278

DS0279

DS0262