PETROGENESIS OF LOW SILICA ADAKITIC DOMES OF SAHL (SOUTH OF SHAHROOD, SOUTHEAST OF SEMNAN PROVINCE)

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YOUSEFI FAZILAT; SADEGHIAN MAHMOUD; SADATI JAMALI SEYEDEH ZAHRA; MANSOURI MOGHADDAM BATOUL; GHASEMI HABIBOLLAH

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Journal: PETROLOGY Year:2017 | Volume:7 | Issue:28 Page(s): 95-108

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Title

PETROGENESIS OF LOW SILICA ADAKITIC DOMES OF SAHL (SOUTH OF SHAHROOD, SOUTHEAST OF SEMNAN PROVINCE)

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Keywords

TRACHYANDESITEQ2

ENCLAVEQ2

METASOMATIZED MANTLE WEDGEQ1

ADAKITEQ2

SAHLQ1

SHAHROODQ1

Abstract

Sahl area, in the south of SHAHROOD, is a part of the northern portion of the Central Iran Structural Zone. The area is dominated by a thick sequence of the Paleocene to the middle Eocene volcanic and volcano-sedimentary rocks. Hypabyssal igneous rocks as dome, dike and sill with trachybasaltic andesite and TRACHYANDESITE composition intruded the sequence. Various ENCLAVEs with amphibolitic, gneissic, hornblenditic, pyroxenitic, tonalitic, gabbroic, tuffaceous sandstone and siltstone nature with different sizes and shapes are present in the rocks studied which can be taken as an evidence of contamination and magma mixing processes. With respect to geochemical characteristics, the studied rocks are belonging to low silica ADAKITEs, with calc-alkaline to high potassium calc-alkaline affinity, enriched in LREE and LILE and depleted in HREE and HSFE. Overall, the mentioned ADAKITEs resulted from crystallization of melts originated from partial melting of metasomatized or modified mantle wedge, above the subduction zone of the Neotethys oceanic slab (Sabzevar - Daruneh branch).

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APA: Copy

YOUSEFI, FAZILAT, SADEGHIAN, MAHMOUD, SADATI JAMALI, SEYEDEH ZAHRA, MANSOURI MOGHADDAM, BATOUL, & GHASEMI, HABIBOLLAH. (2017). PETROGENESIS OF LOW SILICA ADAKITIC DOMES OF SAHL (SOUTH OF SHAHROOD, SOUTHEAST OF SEMNAN PROVINCE). PETROLOGY, 7(28 ), 95-108. SID. https://sid.ir/paper/197056/en

Vancouver: Copy

YOUSEFI FAZILAT, SADEGHIAN MAHMOUD, SADATI JAMALI SEYEDEH ZAHRA, MANSOURI MOGHADDAM BATOUL, GHASEMI HABIBOLLAH. PETROGENESIS OF LOW SILICA ADAKITIC DOMES OF SAHL (SOUTH OF SHAHROOD, SOUTHEAST OF SEMNAN PROVINCE). PETROLOGY[Internet]. 2017;7(28 ):95-108. Available from: https://sid.ir/paper/197056/en

IEEE: Copy

FAZILAT YOUSEFI, MAHMOUD SADEGHIAN, SEYEDEH ZAHRA SADATI JAMALI, BATOUL MANSOURI MOGHADDAM, and HABIBOLLAH GHASEMI, “PETROGENESIS OF LOW SILICA ADAKITIC DOMES OF SAHL (SOUTH OF SHAHROOD, SOUTHEAST OF SEMNAN PROVINCE),” PETROLOGY, vol. 7, no. 28 , pp. 95–108, 2017, [Online]. Available: https://sid.ir/paper/197056/en

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