OPTICALLY SECTOR-TWINNED SPESSARTINE GARNET FROM A PIEMONTITE QUARTZ SCHIST IN THE ASEMI-GAWA AREA OF THE SANBAGAWA METAMORPHIC BELT, CENTRAL SHIKOKU, JAPAN

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

IZADYAR J.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: Iranian Journal of Crystallography and Mineralogy Year:2000 | Volume:8 | Issue:1 Page(s): 83-100

Download Full-Text

Persian Verion

View:

1,304

Download:

Cites:

Information Journal Paper

Title

OPTICALLY SECTOR-TWINNED SPESSARTINE GARNET FROM A PIEMONTITE QUARTZ SCHIST IN THE ASEMI-GAWA AREA OF THE SANBAGAWA METAMORPHIC BELT, CENTRAL SHIKOKU, JAPAN

Author(s)

IZADYAR J. | Issue Writer Certificate

Keywords

OPTICALLY ANISOTROPIC GARNETQ4

PIEMONTITE SCHISTQ4

SANBAGAWA METAMORPHIC BELTQ4

SECTOR STRUCTUREQ4

SPESSARTINE GARNETQ4

Abstract

Optically sector - twinned garnet was found in a piemontite quartz schist in the Asemi-gawa area from the SANBAGAWA METAMORPHIC BELT. The SANBAGAWA METAMORPHIC BELT was formed during a regional Cretaceous intermediate high pressure type of metamorphism which is present through Southwest Japan. The garnet contains abundant inclusions of piemontite, quartz, hematite, braunite, talc and sodic amphibole. It is almost homogenous SPESSARTINE GARNET (Xsps = 0.85). Piemontite occurs both in matrix and as inclusion in garnet and albite and it usually shows distinct zonation in which core of the grain contains lower Fe3+ and higher Mn3+ - and Al-contents than those of the rim. The garnet is anisotropic and composed of several parts or sectors visible in crossed polars. They show different patterns such as octahedral, hexahedral and tetrahedral in which optical orientation and extinction position are roughly symmetrical. A rhombododecahedral model garnet was used to interpret the geometry of the optically SECTOR STRUCTURE and show that sectors with symmetrical Miller's indices have similar optical properties. Textural relation and systematic partitioning of Mn3+ , Fe3+ and Al among garnet, piemontite and braunite indicate that garnet formation is due to the piemontite and braunite reaction.

Cites

No record.

References

No record.

Cite

APA: Copy

IZADYAR, J.. (2000). OPTICALLY SECTOR-TWINNED SPESSARTINE GARNET FROM A PIEMONTITE QUARTZ SCHIST IN THE ASEMI-GAWA AREA OF THE SANBAGAWA METAMORPHIC BELT, CENTRAL SHIKOKU, JAPAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 8(1), 83-100. SID. https://sid.ir/paper/3834/en

Vancouver: Copy

IZADYAR J.. OPTICALLY SECTOR-TWINNED SPESSARTINE GARNET FROM A PIEMONTITE QUARTZ SCHIST IN THE ASEMI-GAWA AREA OF THE SANBAGAWA METAMORPHIC BELT, CENTRAL SHIKOKU, JAPAN. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2000;8(1):83-100. Available from: https://sid.ir/paper/3834/en

IEEE: Copy

J. IZADYAR, “OPTICALLY SECTOR-TWINNED SPESSARTINE GARNET FROM A PIEMONTITE QUARTZ SCHIST IN THE ASEMI-GAWA AREA OF THE SANBAGAWA METAMORPHIC BELT, CENTRAL SHIKOKU, JAPAN,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 8, no. 1, pp. 83–100, 2000, [Online]. Available: https://sid.ir/paper/3834/en

Related Journal Papers