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
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 petrogenesis, as well
as their ori...
Late Cretaceous paleoenvironment and lake level fluctuation in the Songliao Basin, northeastern China
Island Arc - Tập 20 Số 1 - Trang 6-22 - 2011
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 in a freshwater lake
environment,...
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
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 megacrysts. Rocks
from the Pis...
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
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 continental margin of the Yangtze craton (ca 750‐700 Ma), the
tectonic in...
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
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 the metasomatic
orthopyroxene ha...
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
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 North China craton.
However, few of...
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
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 Heilongjiang complex is
composed pre...
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
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 are predom...
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
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 terrigenous to
shallow marine...
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
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 imbrication zone where a
decolle...
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