نتایج جستجو برای: eocene alkaline rocks

تعداد نتایج: 68026  

Journal: :Turkish Journal of Earth Sciences 2023

At the south of Bardsir, Kerman province, Iran, southeastern part Urmia-Dokhtar magmatic arc (UDMA), a large number gabbroic intrusions are intruded into Eocene lava flows and pyroclastic rocks with form small stocks dykes. In this paper, geochemical variations, evolutions, origin these investigated. The studied characterized by fine-grained margins resulting from rapid cooling flow differentia...

Journal: :Antarctic Science 2021

Abstract New mapping and dating of volcanic outcrops on the east coast Admiralty Bay, King George Island, has demonstrated that Eocene sequences are dominant also crop out extensively elsewhere, particularly eastern part island. The can be divided into at least three formations (Hennequin, Cape Vauréal Carruthers Cliff) together with strata Warkocz near Lions Rump currently unassigned stratigra...

مرادیان, عباس ,

The studied volcanic alkaline rocks with 32.7+6 Ma years age are croped out along the south – east of Urumiyeh - Dokhtar Volcanic Belt in Kerman province. Based on the TAS classification these rocks are divided in to tephriphonolite and phonolite which belong to high-K alkaline rocks. These rocks are composed of pyroxene, plagioclase, sanidine, nepheline, analcime and titanomagnetite minerals. ...

Ahmadi, Ali, Mirnejad, hasan, Mokhtari, Neda,

The alkaline extrusive rocks of Neogene from Nehbandan-Assagie region, eastern Iran, include basanite, hawaiite, mugearite and benmoreite. Relatively low Ni and Cr contents and Mg-numbers of basanites are indicative of olivine and clinopyroxene fractionation from their relevant primary magma. Decreasing of CaO, TiO2, FeOt, HREEs and MREEs with increasing SiO2 indicate fractional crystallization...

Journal: :Turkish Journal of Earth Sciences 2022

Modal analysis of sandstones for conglomerate rich marine basins is useful investigating the provenance types surrounded by plate tectonics. Different kinds siliciclastic rocks are important indicators defining paleogeography and geotectonic conditions sedimentary basin analysis. This paper, which focuses on petrography turbidite systems, one rarest studies characteristics in scientific literat...

1998
CARLOS J. GARRIDO JEAN-LOUIS BODINIER

melt fractions that percolated pervasively throughout the massif and On the basis of their structural and compositional characteristics, had a refractory, calc-alkaline character. Locally, these melts were mafic rocks in the Ronda peridotite are classified into four groups: tapped into cracks forming intrusive dykes. group A (garnet-bearing rocks) occurring in the spinel tectonite domain; group...

Calagari, , Hassani Soughi, , Sohrabi, ,

The gold-bearing prospect area at Gharehchay is located in about 2 km south of Tikmehdash, East-Azarbaidjan, NW Iran. The host rocks of the gold-bearing quartz veins/veinlets are principally Eocene andesites and upper Eocene-Oligocene felsic intrusive body (granite to alkali granite). Wall rocks alteration haloes developed around the veins/veinlets are mainly of silicic, phyllic, phyllic-argill...

رمضانی آب‌بخش, توران, ملکزاده شفارودی, آزاده, کریم‌پور, محمدحسن,

The Hatamabad prospect area is located in northeast of Qaen, South Khorasan Province and in northeast of Lut block. The geology of area consists of volcanic rocks with basalt- andesite composition and sedimentary sequences (mudstone, limestone, and conglomerate) with Paleocene-Eocene age that monzodioritic dikes were intruded in them. Monzodioritic dikes have high-k calc-alkaline and metalumino...

Biabangard, , Boomaeri, , frasatmirbaluchzahe, ,

Garagheh granitoid is located in the northwest Zahedan batholite and is exposed in Zahedan-Saravan granitoid belt and Sistan suture zone. This granitoid is composed of granite (synogranite, monzogranite) and granodiorite. These rocks have mainly consist of plagioclase, orthoclase, microcline, quartz, biotite and hornbelend with granoular texture. This pluton cut by microdioritic dykes. Garagheh...

قاسمی, حبیب ا..., کرد, مالک, خانعلی زاده, علیرضا , صادقیان, محمود,

Ellipsoidal huge granitoidic batholiths of Zahedan, with NW-SE trending, located in south of this city which is intruded in low metamorphosed Eocene flysches (eastern Iran flysch zone). This batholith has two compositional terms: an extensive intermediate-acid term includes diorite - granodiorite with igneous source (I- type origin) and a low extent crustal and hybrid origin acidic term (H-type...

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