نتایج جستجو برای: monzonite
تعداد نتایج: 135 فیلتر نتایج به سال:
Abstract Generally all orogenic ultrapotassic rocks are formed after melting of metasomatized sub-continental lithospheric mantle via subducted crustal mica-bearing lithologies. Here we present another possible model, based on the study small Stomanovo monzonite porphyry intrusion in Central Rhodope Massif, Bulgaria. The dated at 30.50 ± 0.46 Ma is intruded into voluminous Oligocene (31.63 0.40...
چکیده ندارد.
We provide the results of studying internal structure and composition rocks Semeitau Delbegetei massifs located in Eastern Kazakhstan. It was previously believed that these have different ages were formed geodynamic settings. The U-Pb zircon age from monzonites quartz determined to be 249 ± 2 Ma, which showed same Early Triassic massifs. Both are composed monzonite–granite series with a signifi...
The Matangkaka manganese deposit is an unusual Quaternary epithermal stratabound oxide from Ambitle Island in the Feni Group, New Ireland Province, Papua Guinea. a small volcanic island that has undergone explosive and effusive activity. Oldest rocks on consist of mafic–intermediate lavas epiclastic Pleistocene Volcano (Waramung Volcanics). These rest unconformably Oligocene calcilutites Basin....
The intrusive bodies of Central Alborz, with display lithological composition, include olivine gabbro, olivine monzodiorite, olivine monzonite and pyroxene monzonite. They are accompanied by pyroclastic rocks of the Karaj Formation, and they occur as sill, lopolith, stock and plug. The essential minerals of these rocks are plagioclase, alkali feldspar, pyroxene, olivine and biotite. Mineral che...
شیمی کانی و بررسی نقش آلومینیوم کل بیوتیت برای تشخیص نوع کانیزایی در تودههای نفوذی محور کرج-طالقان
The intrusive bodies of Karaj-Taleghan axis in Central Alborz constitute, intruded the pyroclastic rocks of Karaj Formation in the form of sill, lopolith, stock and plug with distict distribution. Based on microscopic studies, these bodies have similar lithological composition and include olivine gabbro, olivine monzodiorite, olivine monzonite, pyroxene monzonite with felsic dikes of syenite. T...
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