Island Arc

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Petrogenesis and tectonomagmatic significance of volcanic and subvolcanic rocks in the Albanide–Hellenide ophiolitic mélanges
Island Arc - Tập 14 Số 4 - Trang 494-516 - 2005
Yıldırım Dilek, Adonis Photiades
Abstract  Ophiolitic mélanges associated with ophiolitic sequences are wide spread in the Mirdita–Subpelagonian zone (Albanide–Hellenide Orogenic Belt) and consist of tectonosedimentary ‘block‐in‐matrix‐type’ mélanges. Volcanic and subvolcanic basaltic rocks included in the main mélange units are studied in this paper with the aim of assessing their chemistry and pet...... hiện toàn bộ
Late Cretaceous paleoenvironment and lake level fluctuation in the Songliao Basin, northeastern China
Island Arc - Tập 20 Số 1 - Trang 6-22 - 2011
Dangpeng Xi, Xiaoqiao Wan, Lubomir F. Jansa, Yiyi Zhang
AbstractStudy of Late Cretaceous lacustrine sedimentary strata in the eastern Songliao Basin, China revealed that the paleoclimate was relatively arid and hot during sedimentation of the upper Santonian of the Yaojia Formation, but became relatively humid and warm during deposition of the lower Campanian Nenjiang Formation. The upper Yaojia Formation was deposited ...... hiện toàn bộ
Contribution of subducted Pacific slab to Late Cretaceous mafic magmatism in Qingdao region, China: A petrological record
Island Arc - Tập 17 Số 2 - Trang 231-241 - 2008
Jin Zhang, Hongfu Zhang, Jifeng Ying, Yanjie Tang, Li-feng Niu
Abstract  The occurrence of the Pishikou mafic dike in the Qingdao region, China provides important constraints on the origin of Late Cretaceous (86–78 Ma) mafic magmatism on the eastern North China craton. The Pishikou mafic dike is distributed in the Cretaceous Laoshan granitoid body, Qingdao region and contains peridotitic and granulitic xenoliths, xenocrysts, and...... hiện toàn bộ
Paleogeographic maps of the Japanese Islands: Plate tectonic synthesis from 750 Ma to the present
Island Arc - Tập 6 Số 1 - Trang 121-142 - 1997
Shigenori Maruyama, Yukio Isozaki, Gaku Kimura, Masaru Terabayashi
Abstract A series of paleogeographic maps of the Japanese Islands, from their birth at ca 750–700 Ma to the present, is newly compiled from the viewpoint of plate tectonics. This series consists of 20 maps that cover all of the major events in the geotectonic evolution of Japan. These include the birth of Japan at the rifted continent...... hiện toàn bộ
Metasomatized harzburgite xenoliths from Avacha volcano as fragments of mantle wedge of the Kamchatka arc: Implication for the metasomatic agent
Island Arc - Tập 12 Số 2 - Trang 233-246 - 2003
Shoji Arai, Satoko Ishimaru, Victor M. Okrugin
Abstract  Abundant peridotite xenoliths have been found in pyroclasitics of Avacha (Avachinsky) volcano, the south Kamchatka arc, Russia. They are mostly refractory harzburgite with or without clinopyroxene: the Fo of olivine and Cr/(Cr + Al) atomic ratio of spinel range from 91 to 92 and from 0.5 to 0.7, respectively. They are metasomatized to various extents, and t...... hiện toàn bộ
Zircon U–Pb ages and tectonic implications of ‘Early Paleozoic’ granitoids at Yanbian, Jilin Province, northeast China
Island Arc - Tập 13 Số 4 - Trang 484-505 - 2004
Yanbin Zhang, Fu‐Yuan Wu, Simon A. Wilde, Mingguo Zhai, Xuehong Lu, Deyou Sun
Abstract  The Yanbian area is located in the eastern part of the Central Asian Orogenic Belt (CAOB) of China and is characterized by widespread Phanerozoic granitic intrusions. It was previously thought that the Yanbian granitoids were mainly emplaced in the Early Paleozoic (so‐called ‘Caledonian’ granitoids), extending east–west along the northern margin of the Nort...... hiện toàn bộ
The Heilongjiang Group: A Jurassic accretionary complex in the Jiamusi Massif at the western Pacific margin of northeastern China
Island Arc - Tập 16 Số 1 - Trang 156-172 - 2007
Fu‐Yuan Wu, Jin‐Hui Yang, Ching‐Hua Lo, Simon A. Wilde, Deyou Sun, Bor–ming Jahn
Abstract  The tectonic setting of the Eastern Asian continental margin in the Jurassic is highly controversial. In the current study, we have selected the Heilongjiang complex located at the western margin of the Jiamusi Massif in northeastern China for geochronological investigation to address this issue. Field and petrographic investigations indicate that the Heilo...... hiện toàn bộ
An overview and tectonic synthesis of the pre‐Tertiary very‐high‐pressure metamorphic and associated rocks of Java, Sulawesi and Kalimantan, Indonesia
Island Arc - Tập 7 Số 1-2 - Trang 184-200 - 1998
C. D. Parkinson, Kazuhiro Miyazaki, Koji Wakita, A. J. Barber, D. A. Carswell
High‐pressure metamorphic rocks are widely distributed in Cretaceous accretionary complexes throughout Java, Sulawesi (formerly Celebes) and southeast Kalimantan (Indonesian Borneo). Many of these rocks occur as imbricate slices of carbonate, quartzose and pelitic schists of shallow marine or continental margin parentage, interthrust with subordinate basic schists and serpentinite. They ar...... hiện toàn bộ
An outline of the petrology, structure and age of the Pompangeo Schist Complex of central Sulawesi, Indonesia
Island Arc - Tập 7 Số 1-2 - Trang 231-245 - 1998
C. D. Parkinson
Variably dismembered and metamorphosed accretionary complexes constitute the basement of much of the Indonesian island of Sulawesi. The most extensive of these is the Pompangeo Schist Complex, which crops out over ∼ 5000 km2 in central Sulawesi, and is predominantly composed of interbanded phyllitic marble, calcareous phyllite, graphitic schist and quartzite; rocks of ...... hiện toàn bộ
Evolution of an accretionary complex along the north arm of the Island of Sulawesi, Indonesia
Island Arc - Tập 13 Số 1 - Trang 1-17 - 2004
Y. Djajadihardja, Asahiko Taira, Hidekazu Tokuyama, Kan Aoike, Christian Reichert, M. Block, Hans U. Schluter, S. Neben
Abstract  Seismic reflections across the accretionary prism of the North Sulawesi provide excellent images of the various structural domains landward of the frontal thrust. The structural domain in the accretionary prism area of the North Sulawesi Trench can be divided into four zones: (i) trench area; (ii) Zone A; (iii) Zone B; and (iv) Zone C. Zone A is an active i...... hiện toàn bộ
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