https://revistes.ub.edu/index.php/GEOACTA <p><strong><span style="font-size: 11.5pt; line-height: 107%; font-family: Verdana, sans-serif; color: #c55a11; background-image: initial; background-position: initial; background-size: initial; background-repeat: initial; background-attachment: initial; background-origin: initial; background-clip: initial;"><a href="https://revistes.ub.edu/index.php/GEOACTA/libraryFiles/downloadPublic/172" target="_blank" rel="noopener">50th (1966-2016)</a></span></strong></p> <p><span style="color: #c55a11; font-family: Verdana, sans-serif;"><span style="font-size: 15.3333px;"><strong>Journal Citation Reports </strong></span></span><strong style="font-size: 15.3333px; color: #c55a11; font-family: Verdana, sans-serif;">(ISI)</strong></p> <p><img style="float: left; margin: 10px;" src="https://revistes.ub.edu/public/site/images/admingeac/imagen1.png" alt="" width="249" height="230" /></p> <p style="text-align: justify;"><br />An international general Earth Science Journal providing an innovative and high-quality means of scientific dissemination, with researchers and specialists in the Earth Science field as the main audience. Geologica Acta is a non-profit DIAMOND OPEN ACCESS (neither submission nor reading fees are charged) which has the aim to stimulate rapid diffusion of results and efficient exchange of ideas between the widespread communities of researchers in Earth Science. Since 2019, in accordance with current standards, Geologica Acta publishes continuously in an annual volume.</p> <p> </p> <hr style="color: #e4af00;" /> <p> </p> en-US <p><strong>Copyright</strong></p> <p>Geologica Acta is the property of the UB, GEO3BCN, IDAEA and UAB. Geologica Acta must be cited for any partial or full reproduction. Papers are distributed under the <a href="http://creativecommons.org/licenses/by-sa/4.0/">Attribution-Share Alike Creative Commons License</a>. This license allows anyone to reproduce and disseminate the content of the journal and even make derivative works crediting authorship and provenance and distributing possible derivative works under the same or an equivalent license.</p> <p><strong>Author Rights</strong></p> <p>Authors retain the copyright on their papers and are authorized to post them on their own web pages or institutional repositories. The copyright was retained by the journal from the year 2003 until 2009. In all cases, the complete citation and a link to the Digital Object Identifier (DOI) of the article must be included. </p> <p>The authors can use excerpts or reproduce illustrations of their papers in other works without prior permission from Geologica Acta provided the source of the paper including the complete citation is fully acknowledged.</p> geologica-acta@geo3bcn.csic.es (Laura Rincón) geologica-acta@geo3bcn.csic.es (Scholar assistant) Mon, 29 Jan 2024 00:00:00 +0000 OJS 3.2.1.4 http://blogs.law.harvard.edu/tech/rss 60 https://revistes.ub.edu/index.php/GEOACTA/article/view/42777 <p>The Chenar volcanic cone intruded the southeastern part of the Dehaj-Sarduiyeh volcano-sedimentary belt, in the southeast Urumieh-Dokhtar magmatic arc in Iran. The adakitic rocks, with porphyritic texture, mainly consist of rhyodacites and dacites,commonly comprised of phenocrysts of plagioclase, hornblende and biotite, with rare K-feldspar in a groundmass composed of plagioclase, K-feldspar and quartz. They yielded U-Pb zircon ages of 5.52±0.099Ma, 5.46±0.12Ma, and 6.44±0.12Ma, and radiogenic ɛHf(t) values ranging from +3.1 to +12.7. The whole-rock geochemical analysis of these rocks reveals transitional calc-alkaline to shoshonitic characteristics.</p> <p><br />The geochemical characteristics of the study rocks, particularly their high Sr/Y (⁓51.6-136.8) at low Y (⁓4.43–16.2ppm) and high La/Yb (⁓28.4–118.4ppm) at low Yb (⁓0.2–1.3ppm), are coherent with a high silica adakitic signature. The whole-rock positive Eu/Eu* anomaly and zircon Ce/Ce* anomaly reflect the effects of an oxidized magmatic signature where the rocks of the study area originated from a mantle source. The high silica adakite geochemical characteristics of the Chenar volcanic cone support formation by partial melting of the modified mantle under the influence of metasomatized subducted oceanic slab in a post-collisional environment.</p> Hamideh Salehi Nejard, Elham Shahosinie, Asma Nazarinia, David R. Lentz Copyright (c) 2024 Hamideh Salehi Nejard, Elham Shahosinie, Asma Nazarinia, David R. Lentz https://creativecommons.org/licenses/by-sa/4.0 https://revistes.ub.edu/index.php/GEOACTA/article/view/42777 Mon, 29 Jan 2024 00:00:00 +0000