GEOROC Sample Information

Location
Latitude 13.42 | Longitude 94.27
SUNDA ARC / ANDAMAN ARC / NARCONDAM ISLAND / NARCONDAM
NNE OF BARREN ISLAND
CONVERGENT MARGIN

Reference

SENGUPTA S. K.,PAL T.,MITRA S. K.,KATARI A.,BANDOPADHYAY P. C.,BHATTACHARYA A. K.

DACITE-ANDESITES OF NARCONDAM VOLCANO IN THE ANDAMAN SEA - AN IMPRINT OF MAGMA MIXING IN THE INNER ARC OF THE ANDAMAN-JAVA SUBDUCTION SYSTEM

J. VOLCANOL. GEOTHERM. RES. 168 [2007] 93-113

Sample Name: N11B

Sample Information

DACITE / PORPHYRITIC TEXTURE / NON-VESICULAR COMPACT
OUTCROP

Sample Age Information

No sample age information given.

Chemistry (and, if given, analytical ages)

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) PLAGIOCLASE

AN49.4 MOL%
AL2O327.8 WT%
CAO10.13 WT%
FEOT0.28 WT%
K2O0.33 WT%
MGO0.05 WT%
NA2O5.51 WT%
SIO255.53 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) PLAGIOCLASE

AN61.6 MOL%
AL2O330 WT%
CAO12.73 WT%
FEOT0.39 WT%
K2O0.22 WT%
MGO0.05 WT%
NA2O4.24 WT%
SIO252.17 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) AMPHIBOLE

AL2O314.12 WT%
CAO11.5 WT%
FEOT12.54 WT%
K2O0.35 WT%
MGO13.67 WT%
MNO0.15 WT%
NA2O2.3 WT%
SIO240.79 WT%
TIO22 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) AMPHIBOLE

AL2O312.22 WT%
CAO16.79 WT%
FEOT4.79 WT%
K2O0.04 WT%
MGO14.39 WT%
MNO0.2 WT%
NA2O1.13 WT%
SIO248.27 WT%
TIO20.67 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) PYROXENE

EN72.44 MOL%
FS24.76 MOL%
WO2.801 MOL%
AL2O34.05 WT%
CAO1.37 WT%
FEOT15.05 WT%
K2O0.24 WT%
MGO25.47 WT%
MNO0.46 WT%
NA2O0.38 WT%
SIO252.04 WT%
TIO20.47 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) GLASS

AL2O316.75 WT%
CAO17.23 WT%
FEOT4.56 WT%
K2O0.09 WT%
MGO7.89 WT%
MNO0.21 WT%
NA2O1.7 WT%
SIO247.01 WT%
TIO20.47 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) GLASS

AL2O311.88 WT%
CAO0.5 WT%
FEOT1.7 WT%
K2O5.72 WT%
MGO0.18 WT%
MNO0.01 WT%
NA2O2.86 WT%
SIO269.88 WT%
TIO20.21 WT%

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) GLASS

AL2O311.59 WT%
CAO0.62 WT%
FEOT1.06 WT%
K2O5.45 WT%
MGO0.19 WT%
MNO0.1 WT%
NA2O2.9 WT%
SIO271.86 WT%
TIO20.43 WT%