Kuritani, T. (1999) Boundary layer fractionation constrained by differential information from the Kutsugata lava flow, Rishiri Volcano, Japan, Journal of Geophysical Research, 104, 29401-29417, doi: 10.1029/1999JB900266. < 20150918135922-500097 > pub

Map on Earth or stone. Places and analyses are shown.

  • abstract:

    Detailed investigation of an erupted magma with limited compositional diversity provides instantaneous information on incremental magma differentiation processes in a magma chamber. Kutsugata lava, a suitable target of such study, is a Quaternary alkali basalt (51.3–53.2 wt% in SiO2) from Rishiri Volcano, northern Japan. Despite the narrow range in the whole rock compositional variation, chemical and modal compositions of mineral phases crystallized in the magma chamber vary systematically with the whole rock composition. In the North lava (51.3–51.9 wt% in SiO2) the less differentiated portion of the Kutsugata lava, most crystals which include low‐Ni olivine and plagioclase were derived from the mushy boundary layer. The main part of the magma body was principally aphyric (< 0.5 vol% crystals). Estimated chemical compositions of fractionated mineral phases during differentiation of the magma coincide with the observed compositions of low‐Ni olivine and plagioclase crystals. This indicates that the main magma was differentiated by separation of crystals grown in the mush zone. The low‐density interstitial melt is suggested to have been extracted from the floor mush zone with average crystallinity of >30 vol% by such mechanisms as compaction and compositional convection. This fractionated melt was mixed with the overlying main magma, causing differentiation of the Kutsugata magma. The average temperature of the extracted melt is 1010°C, significantly lower than 1100°C estimated for the main magma. A quantitative model of magmatic differentiation, which includes thermal and compositional evolution of a mushy boundary layer, can successfully reproduce the observed compositional trends of the North lava.

  • doi: 10.1029/1999JB900266
  • modified at 2019-07-18
ISEI/main/127/D/4/Kuritani 17 < 20091014092142923.hkitagawa >
20151109091821-112596 Tixhr 269462790 thumb Km 11 < 20151109091821-112596 >pub
  • IGSN: IEDRM0088
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (kg): 2.285
  • description: Kutsugata Lava, South Lava
  • modified at 2019-07-18
20151109090906-874432 Tixhr 1796037154 thumb Km 3a < 20151109090906-874432 >pub
  • IGSN: IEDRM0087
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 523.41
  • description: Kutsugata Lava, South Lava 1 (augite phenocryst-poor lava)
  • modified at 2019-07-18
ISEI/main/127/D/5/Kuritani 27 < 20091014092125951.hkitagawa >
20151113080017-796937 Tixhr572971475 thumb KR 9 < 20151113080017-796937 >pub
  • IGSN: IEDRM0089
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 673.57
  • description: Kutsugata Lava, South Lava 2 (augite phenocryst-rich lava)
  • modified at 2019-07-18
ISEI/main/127/D/6/Kuritani 21 < 20091014092136165.hkitagawa >
20151130084246-069488 Tixhr1286665639 thumb Ta-26 < 20151130084246-069488 >pub
  • IGSN: IEDRM008E
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 108.49
  • description: Kutsugata Lava, North Lava
  • modified at 2019-07-18
ISEI/main/127/D/6/Kuritani 29 < 20091014092122569.hkitagawa >
20151125083843-709246 Tixhr1023603247 thumb Fm-17a < 20151125083843-709246 >pub
  • IGSN: IEDRM008C
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 1184.68
  • description: Kutsugata Lava, North Lava
  • modified at 2019-07-18
20151125083641-768130 Tixhr1522928762 thumb Fm-15a < 20151125083641-768130 >pub
  • IGSN: IEDRM008B
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 1012.69
  • description: Kutsugata Lava, North Lava
  • modified at 2019-07-18
ISEI/main/127/D/3/Kuritani 20 < 20091014092137832.hkitagawa >
20151124084009-856544 Tixhr1753106849 thumb Ku 20 < 20151124084009-856544 >pub
  • IGSN: IEDRM008A
  • classification: volcanic:basaltic
  • physical-form: hand specimen
  • quantity (g): 163.53
  • description: Kutsugata Lava, South Lava
  • modified at 2019-07-18
20190702105804-254352 Fm-17a_core < 20190702105804-254352 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702110231-070670 Fm-15a_core < 20190702110231-070670 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702110447-147749 Ta-26_core < 20190702110447-147749 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702110642-857619 Km 3a_core < 20190702110642-857619 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702110818-740152 Ku 20_core < 20190702110818-740152 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702111011-416579 KR 9_core < 20190702111011-416579 >pub
  • status: (unknown)
  • modified at 2019-07-18
20190702111148-437387 Km 11_core < 20190702111148-437387 >pub
  • status: (unknown)
  • modified at 2019-07-18
name box-type global-id
binder of Boundary layer fractionation constrained by differential information from the Kutsugata lava flow, Rishiri Volcano, Japan pub container 20160212141959-319984
name latitude longitude global-id
name device size global-id
Km 11 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190614132240-215944
Km 11 pub XRF Philips PW-1480 (Tokyo) 21 20190614135257-427289
Kr 9 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190613154312-964179
Kr 9 pub XRF Philips PW-1480 (Tokyo) 21 20190613153951-591714
Kr 9_1 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190617155517-853594
KR 9_2007 pub XRF PANalytical PW2400 14 20190620160218-111495
KR 9 pub TIMS Finnigan MAT261, MAT262 and Triton TI 3 20190621092709-819087
KR 9_2007 pub ICPMS Yokogawa PMS2000 25 20190621091433-894404
KR 9_2007 pub TIMS Thermo-Fisher MAT261 1 20190621092556-192010
Ta-26 pub XRF Philips PW-1480 (Tokyo) 21 20190613153949-950172
Ta-26 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190613154312-512410
Ta-26 pub TIMS Thermo-Fisher MAT261 1 20190619150147-858021
Ta-26 pub 2 20190619143339-732533
Ta-26_1 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190617155225-624711
Ta-26 pub ICPMS Yokogawa PMS2000 27 20190619150129-468792
Ta-26 pub XRF PANalytical PW2400 13 20190619143323-498968
Ta-26 pub TIMS Finnigan MAT261, MAT262 and Triton TI 1 20190619153604-549380
Ta-26 pub TIMS Finnigan MAT261, MAT262 and Triton TI 1 20190619153615-174801
Ta-26 pub TIMS Finnigan MAT261, MAT262 and Triton TI 1 20190619153637-963889
Ta-26 pub TIMS Finnigan MAT261, MAT262 and Triton TI 3 20190619153625-089290
Fm-17a pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190613154311-058210
Fm-17a pub XRF Philips PW-1480 (Tokyo) 21 20190613153947-666112
Fm-17a_1 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190617155044-299576
Km 3a pub XRF Philips PW-1480 (Tokyo) 21 20190613153950-017325
Km 3a_1 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190617155345-038651
Km 3a pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190613154312-359599
Ku 20 pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190614132239-634497
Ku 20 pub XRF Philips PW-1480 (Tokyo) 21 20190614135257-786805
Fm-15a pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 4 20190614132239-012557
Fm-15a pub XRF Philips PW-1480 (Tokyo) 21 20190614135256-793172
Fm-15a pub 2 20190619143339-746961
Fm-15a pub ICPMS Yokogawa PMS2000 27 20190619150128-801019
Fm-15a pub XRF PANalytical PW2400 13 20190619143323-065742
Fm-15a pub TIMS Finnigan MAT261, MAT262 and Triton TI 1 20190619153604-106831
Fm-15a pub TIMS Thermo-Fisher MAT261 1 20190619150147-908533
Fm-15a pub TIMS Finnigan MAT261, MAT262 and Triton TI 1 20190619153615-768067
Fm-15a pub TIMS Finnigan MAT261, MAT262 and Triton TI 3 20190619153625-277921
Fm-17a_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702105909-053925
Fm-15a_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702110328-490811
Ta-26_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702110520-830752
Km 3a_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702110713-950554
Ku 20_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702110847-596925
KR 9_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702111043-582254
Km 11_core pub EPMA JEOL JCMA-733MKII/JXA-8900L (Tokyo) 3 20190702111229-448264
Kr-9U-Th_1 pub TIMS Thermo-Fisher MAT261 5 20190621100738-411382
Kr-9U-Th_2 pub TIMS Thermo-Fisher MAT261 5 20190621100738-921659
name spots global-id
caption assembly stone
Table 1. Whole rock and modal compositions of representative samples pub major-trace (Kuritani et al., 1999) 14
manual
  • name
  • Kuritani, T.