Geochemistry of Cretaceous hydromagmatic lava flows in Separdeh district, NE Qazvin, central Alborz

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.

Jafari Sough r.; ASIABANHA A.; NASRABADI M.

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:2018 | Volume:26 | Issue:3 Page(s): 717-732

Download Full-Text

Persian Verion

View:

227

Download:

Cites:

Information Journal Paper

Title

Geochemistry of Cretaceous hydromagmatic lava flows in Separdeh district, NE Qazvin, central Alborz

Author(s)

Jafari Sough r. | ASIABANHA A. | NASRABADI M. | Issue Writer Certificate

Keywords

Submarine eruptionsQ1

continental riftQ1

CretaceousQ2

Central AlborzQ2

QazvinQ2

Abstract

The alkaline and stratoid volcanic rocks of Separdeh district (NE Qazvin), located on the central Albroz zone, are underlain conformably by Early Cretaceous limestones of Tizkuh Formation. These rocks are texturally homogenous and very fine-grained and characterized by microphenocrysts and microliths of plagioclase, pyroxene, olivine, apatite and opaque set in a hyaline matrix. However, few pyroclastic deposits with the following characteristics are found amongst them: patchy fabric, mafic micropillows, relative high vesicularity (3-4 times of lava flows), segregation vesicles, pumiceous clasts and glassy shards. So, in contrary with the effusive lava flows, it can be concluded that they were formed by more explosive eruptions. The samples are tephritic in chemical composition and belonged to the sodic alkaline suite. Although the effusive samples have a similar chemical composition, the pyroclastic samples show higher contents of silica and alkalis and lower amounts of TiO2, Fe2O3 t, MgO and CaO than the effusive lava flows. Also, most samples show an enrichment (about 100 times) of LREEs relative to HREEs, positive anomaly of HFSEs, Th, Rb and Eu, negative anomaly of Ta and K and also no anomaly of Ti and Nb. Moreover, they set in the continental rift setting and show an enriched garnet lherzolite source in the petrogenetic plots. As a result, it can be stated that the parental magma originated from an enriched asthenospheric mantle were effusively erupted in a deep submarine basin through the fissures of an extensional regime (or continental rift setting) during Late Cretaceous times. However, the more acidic magma could be produced by partial melting of lithosphere due to invading of the mantle mafic magma. Sometimes, the styles of eruptions were changed into the more explosive activities by mixing of two magmas intensified by contact with water.

Cites

No record.

References

No record.

Cite

APA: Copy

Jafari Sough, r., ASIABANHA, A., & NASRABADI, M.. (2018). Geochemistry of Cretaceous hydromagmatic lava flows in Separdeh district, NE Qazvin, central Alborz. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 26(3 ), 717-732. SID. https://sid.ir/paper/388090/en

Vancouver: Copy

Jafari Sough r., ASIABANHA A., NASRABADI M.. Geochemistry of Cretaceous hydromagmatic lava flows in Separdeh district, NE Qazvin, central Alborz. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2018;26(3 ):717-732. Available from: https://sid.ir/paper/388090/en

IEEE: Copy

r. Jafari Sough, A. ASIABANHA, and M. NASRABADI, “Geochemistry of Cretaceous hydromagmatic lava flows in Separdeh district, NE Qazvin, central Alborz,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 26, no. 3 , pp. 717–732, 2018, [Online]. Available: https://sid.ir/paper/388090/en

Related Journal Papers

No record.

Related Seminar Papers

No record.

Related Plans

No record.

Recommended Workshops