نتایج جستجو برای: andesite rocks
تعداد نتایج: 22534 فیلتر نتایج به سال:
bentonite deposits of economic interest are widespread in tashtab mountains (khur), east of isfahan province, iran. several bentonite deposits have been developed in this area as a result of eocene volcanic alteration. these deposits are classified as khur bentonite horizon. xrd analyses reveal that alteration products consist of na-montmorillonite, kaolinite, quartz, calcite, and crystobalite....
The long-standing controversy about the origin of magnetite-(apatite) mineral deposits pertains to how they form. Pleistocene El Laco deposit in northern Chile is a critical location because host andesite contains immiscible melt inclusions trapped plagioclase and clinopyroxene phenocrysts that reveal involvement melts evolution Volcanic System hosting mineralization. We present results from fi...
In southeast of Bardsir (Kerman Province), there is a volcanic complex belongs to Uromieh-Dokhtar volcanic belt.This complex mainly contains basaltic-andesite and basalt lava flows with the Eocene age, alternative with pyroclastic rocks. Petrographic evidences include zoning, sieve texture and rounded crystal in plagioclase and pyroxene phenocrysts disequilibrium conditions between crystals and...
Chaharfarsakh intrusive and extrusive rocks are located in 25 Km northwest of Nehbandan and 165 Km south of Birjand and in terms of geology, suituated in the eastern of Lut block. Chaharfaraskh intrusive rocks with Jurassic age were injected into shales and sandastons Shemshak Formation. Intrusive rocks are gabbro, diorite, synogranite, quartz monzonite, hornblend tonalite, granodiorite, granit...
کانسار مسگرماب در50 کیلومتری شمالشرق شهرستان قائن، در قالب برگه زمین شناسی 1:100.000 آبیز و زون شرقایران واقع شده است. سنگهای آتشفشانیکانسار مسگرماب به سن پالئوسن بالایی- ائوسن، شامل تناوبی ازگدازهها (آندزیت، تراکیآندریت، آندزیت-بازالت و بازالت) و موادآذرآواری (انواع توف وآگلومرا) هستند. این سنگها، بر اساس دادههای ژئوشیمیایی عناصر اصلی وکمیاب، شباهت زیادی بهگدازههای کالکآلکال...
The Nikuyeh district is located south of the Tarom-Hashtjin metallogenic province in Western Alborz. Oligo-Miocene subvolcanic intrusion and Mid-Eocene volcanic rocks with composition of dacite to andesite are main igneous settings associated with Nikuyeh polymetallic epithermal ore mineralization. Igneous phase in the Nikuyeh district are porphyritic granodiorite, monzodiorite, quartz monsonit...
Abstract Geothermal energy is one of the mainstay future alternative in Indonesia. One area that believed to have geothermal potential Telaga Tujuh Warna Village Lebong Regency, Bengkulu Province, Manifestations hot springs, mud pools, geysers, sulfur, and presence steam around lake are our beliefs about existence sources area. The purpose this study was determine stratigraphic characteristics ...
The volcanic rocks with the Plio-Quaternary age, are exposed in the northern part of the Sanandaj-Sirjan zone, in northwest Urmia. The main mineral phases are olivin + clinopyroxene ± plagioclase, that are present as both phenocrysts to microcrystalline with other minor minerals. The dominant textures of these rocks are porphyry, microlithic porphyry, hyalo-porphyry, glomeroporphyritic and vesi...
Acidic and basic volcanic and intrusive rocks of Harzandat-Divan Daghy as individual masses, are located in North and Northwest of Marand (Harzandat) and South of Jolfa (Ghareh Gose-Divan Daghy) trending NW-SE.These rocks are located under Permian progressive deposits, which are covered by an igneous sole unconformity. Lithological composition of the acidic volcanic rocks ranges from dacite, rh...
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