Chemical features of orthopyroxene in peraluminous igneous rocks

Jin'ichirou Maeda, Toshiaki Shimura, Kazunori Arita, Yasuhito Osanai, Mamoru Murata, Mitsutaka Bamba, Shin'ichi Suetake

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Chemical compositions of orthopyroxene from peraluminous igneous rocks (PAI orthopyroxene) are compared with those from metalumimous igneous rocks (MAI orthopyroxene). Most of the PAI and MAI orthopyroxene coexists with garnet or Ca-rich clinopyroxene, respectively. PAI orthopyroxene samples are richer in Al2O3 and poorer in CaO than MAI orthopyroxene samples, and these two types of orthopyroxene are clearly separated in an Al-Ca plot. PAI orthopyroxene has Al > 2Ca and MAI orthopyroxene Al < 2Ca; that is, PAI orthopyroxene is corundum normative and MAI orthopyroxene is diopside normative. These compositional differences are understood by the position of orthopyroxene in the ACF diagram, where orthopyroxene is the only ferromagnesian mineral straddling the boundary between the corundumand diopside-normative fields. Compositional differences between PAI and MAI orthopyroxene samples reflect the magmas from which they crystallized.

Original languageEnglish
Pages (from-to)1674-1682
Number of pages9
JournalAmerican Mineralogist
Volume76
Issue number9-10
Publication statusPublished - Dec 1 1991

Fingerprint

Polyamideimides
Igneous rocks
igneous rocks
orthopyroxene
igneous rock
garnets
chemical composition
aluminum oxides
plots
diagrams
minerals
Aluminum Oxide
Garnets
diopside
Minerals
chemical
corundum
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Geophysics
  • Geochemistry and Petrology

Cite this

Maeda, J., Shimura, T., Arita, K., Osanai, Y., Murata, M., Bamba, M., & Suetake, S. (1991). Chemical features of orthopyroxene in peraluminous igneous rocks. American Mineralogist, 76(9-10), 1674-1682.

Chemical features of orthopyroxene in peraluminous igneous rocks. / Maeda, Jin'ichirou; Shimura, Toshiaki; Arita, Kazunori; Osanai, Yasuhito; Murata, Mamoru; Bamba, Mitsutaka; Suetake, Shin'ichi.

In: American Mineralogist, Vol. 76, No. 9-10, 01.12.1991, p. 1674-1682.

Research output: Contribution to journalArticle

Maeda, J, Shimura, T, Arita, K, Osanai, Y, Murata, M, Bamba, M & Suetake, S 1991, 'Chemical features of orthopyroxene in peraluminous igneous rocks', American Mineralogist, vol. 76, no. 9-10, pp. 1674-1682.
Maeda J, Shimura T, Arita K, Osanai Y, Murata M, Bamba M et al. Chemical features of orthopyroxene in peraluminous igneous rocks. American Mineralogist. 1991 Dec 1;76(9-10):1674-1682.
Maeda, Jin'ichirou ; Shimura, Toshiaki ; Arita, Kazunori ; Osanai, Yasuhito ; Murata, Mamoru ; Bamba, Mitsutaka ; Suetake, Shin'ichi. / Chemical features of orthopyroxene in peraluminous igneous rocks. In: American Mineralogist. 1991 ; Vol. 76, No. 9-10. pp. 1674-1682.
@article{0fea34b8f4f845f29201659c428852f0,
title = "Chemical features of orthopyroxene in peraluminous igneous rocks",
abstract = "Chemical compositions of orthopyroxene from peraluminous igneous rocks (PAI orthopyroxene) are compared with those from metalumimous igneous rocks (MAI orthopyroxene). Most of the PAI and MAI orthopyroxene coexists with garnet or Ca-rich clinopyroxene, respectively. PAI orthopyroxene samples are richer in Al2O3 and poorer in CaO than MAI orthopyroxene samples, and these two types of orthopyroxene are clearly separated in an Al-Ca plot. PAI orthopyroxene has Al > 2Ca and MAI orthopyroxene Al < 2Ca; that is, PAI orthopyroxene is corundum normative and MAI orthopyroxene is diopside normative. These compositional differences are understood by the position of orthopyroxene in the ACF diagram, where orthopyroxene is the only ferromagnesian mineral straddling the boundary between the corundumand diopside-normative fields. Compositional differences between PAI and MAI orthopyroxene samples reflect the magmas from which they crystallized.",
author = "Jin'ichirou Maeda and Toshiaki Shimura and Kazunori Arita and Yasuhito Osanai and Mamoru Murata and Mitsutaka Bamba and Shin'ichi Suetake",
year = "1991",
month = "12",
day = "1",
language = "English",
volume = "76",
pages = "1674--1682",
journal = "American Mineralogist",
issn = "0003-004X",
publisher = "Mineralogical Society of America",
number = "9-10",

}

TY - JOUR

T1 - Chemical features of orthopyroxene in peraluminous igneous rocks

AU - Maeda, Jin'ichirou

AU - Shimura, Toshiaki

AU - Arita, Kazunori

AU - Osanai, Yasuhito

AU - Murata, Mamoru

AU - Bamba, Mitsutaka

AU - Suetake, Shin'ichi

PY - 1991/12/1

Y1 - 1991/12/1

N2 - Chemical compositions of orthopyroxene from peraluminous igneous rocks (PAI orthopyroxene) are compared with those from metalumimous igneous rocks (MAI orthopyroxene). Most of the PAI and MAI orthopyroxene coexists with garnet or Ca-rich clinopyroxene, respectively. PAI orthopyroxene samples are richer in Al2O3 and poorer in CaO than MAI orthopyroxene samples, and these two types of orthopyroxene are clearly separated in an Al-Ca plot. PAI orthopyroxene has Al > 2Ca and MAI orthopyroxene Al < 2Ca; that is, PAI orthopyroxene is corundum normative and MAI orthopyroxene is diopside normative. These compositional differences are understood by the position of orthopyroxene in the ACF diagram, where orthopyroxene is the only ferromagnesian mineral straddling the boundary between the corundumand diopside-normative fields. Compositional differences between PAI and MAI orthopyroxene samples reflect the magmas from which they crystallized.

AB - Chemical compositions of orthopyroxene from peraluminous igneous rocks (PAI orthopyroxene) are compared with those from metalumimous igneous rocks (MAI orthopyroxene). Most of the PAI and MAI orthopyroxene coexists with garnet or Ca-rich clinopyroxene, respectively. PAI orthopyroxene samples are richer in Al2O3 and poorer in CaO than MAI orthopyroxene samples, and these two types of orthopyroxene are clearly separated in an Al-Ca plot. PAI orthopyroxene has Al > 2Ca and MAI orthopyroxene Al < 2Ca; that is, PAI orthopyroxene is corundum normative and MAI orthopyroxene is diopside normative. These compositional differences are understood by the position of orthopyroxene in the ACF diagram, where orthopyroxene is the only ferromagnesian mineral straddling the boundary between the corundumand diopside-normative fields. Compositional differences between PAI and MAI orthopyroxene samples reflect the magmas from which they crystallized.

UR - http://www.scopus.com/inward/record.url?scp=0026277974&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0026277974&partnerID=8YFLogxK

M3 - Article

VL - 76

SP - 1674

EP - 1682

JO - American Mineralogist

JF - American Mineralogist

SN - 0003-004X

IS - 9-10

ER -