نتایج جستجو برای: pillow basalt

تعداد نتایج: 4450  

آلیانی, فرهاد, سپاهی‌گرو, علی‌اصغر, معانی‌جو, محمد, موسوی, سیده اعظم,

The ophiolitic complex of Sahneh-Harsin is composed of rock units such as gabbro, basalt, diabasic dikes, diorite and plagiogranite. The geochemical studies show that primitive magma has been sub-alkaline tholeiitic Mg-rich and K-poor. These data show enrichment of light rare earth elements (LREE) and depletion of heavy rare earth (HREE). The ratio of NbTa in the basalts is between 16.19 and 18...

1998
YASUO IKEDA KEISUKE NAGAO ROBERT J. STERN MAKOTO YUASA SALLY NEWMAN

Noble gas concentrations and isotopic compositions have been measured in eight samples of pillow basalt glasses collected from seven different localities along 250 km of the Mariana Trough spreading and rifting axis. The samples have uniform and mid-ocean ridge basalt (MORB)-like He/He values of 9±12 ́ 10 (6.4±8.6 times atmospheric) despite large variations in He. Concentrations of the noble ga...

Journal: :journal of sciences, islamic republic of iran 2009
a.r. shaker ardakani

the upper cretaceous ganj complex, a part of the jazmurian ophiolitic belt, is located on the western boundary of jazmurian depression and separated from kahnuj ophiolitic complex by north-south trending jiroft fault. the complex consists of lava flows, pillow lavas, acidic plutonic and sedimentary rocks which are intruded by northwest-southeast trending dykes. it does not resemble a classical ...

A.R. Shaker Ardakani

The Upper Cretaceous Ganj complex, a part of the Jazmurian ophiolitic belt, is located on the western boundary of Jazmurian depression and separated from Kahnuj ophiolitic complex by north-south trending Jiroft fault. The complex consists of lava flows, pillow lavas, acidic plutonic and sedimentary rocks which are intruded by northwest-southeast trending dykes. It does not resemble a classical ...

Journal: :Minerals 2022

Secondary minerals occur within the tholeiitic basalts of Salsette Island in greater Mumbai region, as well other localities Deccan Volcanic Province (DVP). However, secondary show remarkable differences with respect to their mineral speciation and precipitation sequence, which are both due unique geological environment. The region is built up by subgroup, represents youngest sequence DVP. It f...

Journal: :Journal of Analytical Atomic Spectrometry 2021

Depth profiling and atomic intensity correlation studies on mineralogical inclusion embedded in calcium carbonate phase using a miniature laser mass spectrometer are presented. The method allows the determination of complex phases.

Noghreyan, Mousa, Rezaei, Zahra, Saccani, Emilio,

Sabzevar ophiolitic pillow lavas contain variolitic, porphyritic with microlitic matrix, intersertal and amygdaloidal textures and include plagioclase, clinopyroxene (augite-diopside), olivine, amphibole (magnesiohastingsite) and opaque minerals. The chemical composition of clinopyroxenes show a calc-alkaline magmatic series and a tectonic environment within plate alkaline basalts. Geochemicall...

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