Results 71 to 80 of about 5,229 (211)

İSPENDERE (MALATYA) YÖRESİ, SÜLFİT MİNERALLEŞMELERİNİN JEOLOJİSİ, MİNERALOJİSİ VE JEOKİMYASİ

Bulletin of the Mineral Research and Exploration, 1999
Bu çalışmada, Kızmehmet mahallesi (İspendere-Malatya), bakır-pirit cevherleşmesi ve yakın çevresinin jeolojisi, mineralojisi, petrografisi, jeokimyası, yan kayaç alterasyonu, cevher yan kayaç ilişkileri ve cevherin mikro yapı-doku ilişkileri incelenmiş ...
Halide DUMANLILAR, Doğan AYDAL, Özcan DUMANLILAR   +2 more
doaj  

Geology and petrology of Tertiary volcanic rocks of Sarbisheh perlite mine area (eastern Iran) and industrial applications

Journal of Economic Geology, 2012
The study area is located at northwest of Sarbisheh in South Khorasan province and eastern border of Lut block. In this area, Tertiary (Eocene-Oligocene to Pliocene) volcanic rocks consisting of basaltic andesite, dacite, rhyodacite, vitreous rhyolite ...
Seayad Sayid Mohammadi
doaj   +3 more sources

Dacitic glassy lava flow from Trlično at Rogatec, Eastern Slovenia

Geologija, 2002
Glassy lava from Trlično is dacitic in composition and developed by incomplete mixing of two magmas of similar composition but different degree of groundmass crystallinity.By laminar lava flow banded texture developed consisting of bands with different ...
Polona Kralj
doaj  

Late Triassic high-Mg andesite/dacite suites from northern Hohxil, North Tibet: Geochronology, geochemical characteristics, petrogenetic processes and tectonic implications

, 2011
This study reports age, petrologic and geochemical data for andesites and dacites from the Late Triassic sedimentary strata of northern Hohxil, in the Hohxil–Songpan–Ganzi Block (northern Tibet), which constitutes the most voluminous Triassic strata on ...
Li, ZX, Chung, SL, Yin-Tang Zhu, Zhen-Hua Zhao, Sun-Lin Chung, Wyman, DA, Zhu, YT, Hua-Ning Qiu, Wang, Q, Qiu, H., Qiang Wang, Sun, YL, Wang, Q., Chung, S., Wyman, D., Zheng-Xiang Li, Zhao, Z., Ya-Li Sun, Li, Zheng-Xiang, Derek A. Wyman, Zhao, ZH, Sun, Y., Qiu, HN, Zhu, Y., Wang, Qiang;Li, Zheng-Xiang;Chung, Sun-Lin;Wyman, Derek A.;Sun, Ya-Li;Zhao, Zhen-Hua;Zhu, Yin-Tang;Qiu, Hua-Ning   +24 more
core   +1 more source

Lying in wait: deep and shallow evolution of dacite beneath Volcán de Santa María, Guatemala

, 2016
The Plinian eruption in October 1902 of 8.5 km3of dacitic pumice and minor basaltic andesite scoria and ash at Volcán de Santa María, Guatemala violently interrupted a 25 kyr period of repose that had followed ∼75 kyr of cone-growth ...
J. H. Fournelle (2841464), N. T. Kita (2841473), K. E. Smith (61383), B. R. Jicha (2841449), C. M. Johnson (2841461), M. J. Spicuzza (2841467), B. S. Singer (2841452), B. L. Beard (2841470), S. E. Greene (2841458), J. W. Valley (2841455), N. W. Rogers (2841446)   +10 more
core   +1 more source

Evidence for Low‐Pressure Crustal Anatexis During the Northeast Atlantic Break‐Up

Geochemistry, Geophysics, Geosystems
While basaltic volcanism is dominant during rifting and continental breakup, felsic magmatism may be a significant component of some rift margins. During International Ocean Discovery Program (IODP) Expedition 396 on the continental margin of Norway, a ...
A. M. Morris, S. Lambart, M. A. Stearns, J. R. Bowman, M. T. Jones, G. Mohn, G. Andrews, J. Millett, C. Tegner, S. Chatterjee, J. Frieling, P. Guo, D. W. Jolley, E. H. Cunningham, C. Berndt, S. Planke, C. A. Alvarez Zarikian, P. Betlem, H. Brinkhuis, M. Christopoulou, E. Ferré, I. Y. Filina, D. T. Harper, J. Longman, R. P. Scherer, N. Varela, W. Xu, S. L. Yager, A. Agarwal, V. J. Clementi   +29 more
doaj   +1 more source

Petrogenetic relationship between plutonic and subvolcanic rocks in the Jurassic Shuikoushan complex, South China

Open Geosciences
There has been a longstanding debate on whether plutonic and subvolcanic rocks have a petrogenetic connection, and the Jurassic Shuikoushan caldera complex in South China serves as an ideal case study for unraveling this geological puzzle.
Wang Dan, Fu Yong, Chen Lie-Meng, Hu Qian, Zhang Zhi   +4 more
doaj   +1 more source

The Rudnik Mts. volcano-intrusive complex (central Serbia): An example of how magmatism controls metallogeny

Geologia Croatica, 2016
This study reports and discusses new radiometric ages, petrographical and volcanological observations and whole rock geochemical data of the rocks of the Rudnik Mts. volcano-intrusive complex. The complex hosts a Pb-Zn-Ag deposit and belongs to the Serbo-
Vladica Cvetković, Kristina Šarić, Zoltán Pécskay, Axel Gerdes   +3 more
doaj   +1 more source

Origin of high-Si dacite from rhyolitic melt: evidence from melt inclusions in mingled lavas of the 1.6 Ga Gawler Range Volcanics, South Australia

, 2000
Part of the Mesoproterozoic (1.6Ga) Gawler Range Volcanics in South Australia is composed of mingled feldspar- quartz- phyric dacite, rhyodacite and rhyolite lavas.
Vadim Kamenetsky (14740705), Morrow, NA (15487892), Jocelyn McPhie (14744104)   +2 more
core  

Evolution of the Taupo Volcanic Center, New Zealand: petrological and thermal constraints from the Omega dacite [PDF]

, 2013
The 20 ka *0.1 km3 Omega dacite, which erupted shortly after the 26.5 ka Oruanui super-eruption, compositionally stands out among Taupo Volcanic Zone (TVZ) magmas, which are overwhelmingly characterized by rhyolites ([90 % by volume).
Bachmann, Olivier, Gelman, Sarah E., Gutierrez, Francisco J., Deering, Chad D.   +3 more
core   +1 more source