Basalt and Sediment Geochemistry and Magma Petrogenesis in a Transect from Oceanic Island Arc to Rifted Continental Margin Arc: the Kermadec—Hikurangi Margin, SW Pacific
نویسندگان
چکیده
منابع مشابه
Oxygen Isotope Geochemistry of Oceanic-Arc Lavas
Variations of oxygen isotope ratios in arc-related lavas can constrain trace-element enrichment in a mantle source being fluxed by addition the contributions of subducted crustal igneous rocks, sediments, and of aqueous fluid. Comparison of this model with observed variations fluids to the sub-arc mantle. We have measured oxygen isotope in the geochemistry of lavas from the Vanuatu–Fiji–New Cal...
متن کاملژئوشیمی و سنگ‌شناسی سنگ‌های آتشفشانی شمال‌شرق نراق: ماگماتیسم جزایر قوسی یا حواشی قاره‌ای فعال؟
The tectonic settings for the Urumieh-Dokhtar volcanic-plutonic belt provided by different reaserchers including active continental margin rift and post collisional settings. Geochemical and tectonic studies indicate that this belt belongs to the active continental margin. Basaltic andesite, andesite, trachy andesite, trachy dacite and dacitic rocks in NE Naragh, of the Urumieh-Dokhtar magmatic...
متن کاملGeochemistry and Thermobarometry of Bazman volcanic rocks, An example of active continental margin volcano
Bazman volcano is located in the Makran-Chaghi magmatic arc in southeastern Iran. Many studies have been done on this volcano, especially of petrology such as: Biabangard and Mollazadehbarvati, 2017; Berberian and Berberian, 1982; Mohammadi, 2005; Sahandi et al., 2010; Schmidt and Dabiri, 2019; Firoozkoohi, et al., 2017; Ghodsi et al., 2006; Glamghash et al., 2015; Karimpour et al., 2012; St...
متن کاملTrace elements in anorthite megacrysts from the Kurile Island Arc: a window to across-arc geochemical variations in magma compositions
Anorthite megacrysts from twelve volcanic centers of the Kurile Island Arc were analyzed by the ion microprobe for concentrations of: Li, Be, B, F, Mg, P, Cl, K, Ti, Fe, Co, Rb, Sr, Y, Zr, Nb, Cs, Ba, La, Ce, Pr, Nd, Sm, Eu, and Pb. These 1–2-cm megacrysts are mainly found as early phenocrysts in basalts, but are also present in andesites, rhyolites and hybrid rocks from almost every studied vo...
متن کاملThe Pacific: from “Arc of Instability” to “Arc of Responsibility” and then to “Arc of Opportunity”?
This special volume of Security Challenges contains contributions from leading experts and Pacific scholars that reflect on progress and prospects in the “Pacific arc”. This Introduction begins by identifying common themes that emerge from the contributions regarding the way in which Australia relates to the arc, and how the arc responds to Australia. It then summarises the contributors’ conclu...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Petrology
سال: 1996
ISSN: 0022-3530,1460-2415
DOI: 10.1093/petrology/37.6.1523