Showing papers in "Journal of Southeast Asian Earth Sciences in 1996"

TL;DR: In this article, the authors give answers to the questions of timing, tectonic style and geodynamic interpretation of south China geologic development, which implies two successive suturings of oceanic domains during the Middle-Late Proterozoic: one about 1500 Ma and one about 950 Ma.

TL;DR: In this article, the relative movement between the north China block and the south China block (Yangtze-Cathaysian craton) had been right-lateral along a transform fault during the Late Paleozoic, and contraction was prevailing between the already juxtaposed north and south China blocks and the intervening Dabie-Su-Lu microcontinent.

TL;DR: Pb zircon data from five igneous suites confirm previous studies that demonstrated widespread Pan-African magmatism in the Granulite Terrain of southern India as mentioned in this paper.

TL;DR: Alkaline granites can be broadly divided into anorogenic (AA-type) and post-orogenic granites (PA-type), and they can be identified on the basis of differences in geology, petrology and geochemistry as mentioned in this paper.

TL;DR: Songnim orogeny in Korea is characterized by polycyclic and reiterated intracratonic deformations, which include (a) strike-slip movement of ductile or brittle-ductile shearings, (b) compressive phase of folding, thrusting, and transpression of strike slip movement and (c) extensional phase of basin formation by normal or domino fault system and transtension of strike slip movement as mentioned in this paper.

TL;DR: In this article, the formation of the basement of the Tarim basin and its characteristics are summarized using mobilism and the theory of polycycle by Huang Jiqing (1977, 1984).

TL;DR: In this article, the authors present new KAr isotopic age data on whole rock samples and mineral separates from several igneous rock suites from the Meghalaya-Nagaland region of northeast India.

TL;DR: In this article, a trace-element diagram of the Tananao metamorphic basement complex of Taiwan is presented, showing that most granitic rocks are peraluminous (CNK > 1.0 and normative corundum > 1%) and display moderately fractionated LREE and relatively unfractionated HREE patterns with negative Eu anomalies.

TL;DR: This article showed that the Loess Plateau was covered by an open meadow steppe with the presence of some coniferous species, while the middle part of the plateau (Luochuan) and Xian were covered by steppe.

TL;DR: In this article, the authors proposed a new characterization of Precambrian granulite terranes in Peninsular India, which are characterized by metamorphic events at ca. 2.8-3.0 Ga with local 1.3-1.8 Ga tectonothermal events.

TL;DR: The Chinese continent is a composite continent made up of many blocks of various sizes and it features soft-collision and polycyclic suturing between the blocks and the resulting composite orogeny as mentioned in this paper.

TL;DR: In this article, the authors identify a major Pan-African felsic province in East Gondwana, which, in association with their petrogenetic significance, is considered to be suggestive of a geodynamic signature of the Pan African period.

TL;DR: In this paper, a reconstruction of the regional morphological development is based on interpretation of morphological features and morphodynamic processes in the volcanic upland, in combination with analysis of the sedimentary record in the basin.

TL;DR: The oldest cratonic areas have been identified in South India (north of the Palghat-Cauvery shear zone) and East Antarctica (the Napier Complex) from isotopic studies of the Mozambique Belt of East Africa, the Vijayan Complex of Sri Lanka and the Yamato-Belgica Complex/Sor Rondane Mountains of East Antarctica as discussed by the authors.

TL;DR: In this paper, the ages of pyroclastic zircons from tuff units within the succession indicate Wenlockian [427.2 ± 7.6] and Pridolian [408.9 ± 7 6] ages and remove ambiguity regarding the Silurian age of tuffaceous rocks in the Kurosegawa sequence.

TL;DR: The major and rare-earth elements (REE) of banded iron formations and associated amphibolite from the Sargur belts, the oldest schist belts in the Dharwar craton, were determined by X-ray fluorescence and inductively coupled plasma mass spectrometry (ICP-MS) as mentioned in this paper.

TL;DR: The Eastern Ghats on the east coast of India is a largely granulite terrain but also exposes granites, migmatites, anorthosites and alkaline rocks as mentioned in this paper.

TL;DR: In the early Devonian stage, most of South China was above sea level as discussed by the authors, and a shallow sea covered the southern parts of the continent while northern areas, forming the Huanan Landmass, were emergent.

TL;DR: The Shillong Plateau of northeast India is identified as an alkaline province in view of the development of several carbonatite complexes e.g. the Sung Valley (Jaintia Hills), Jasra (Karbi-Anglong), Samchampi and Barpung (Mikir Hills) as discussed by the authors.

TL;DR: In this article, the tensional, compressional, and transitional oil and gas basins in China are grouped into three types: the tension, the compressional and the transitional.

TL;DR: In this article, the authors show that the current forearc basin configuration along the Sunda Arc initially appears to have been controlled by extension and differential subsidence of basement blocks in response to the late Eocene collision of India with Asia.

TL;DR: In the early Proterozoic, a tectonic regime of coexisting mobile belts of different characteristics and rigid blocks emerged as discussed by the authors, which marked the beginning of a new epoch of crustal evolution.

TL;DR: A sediment core collected from the Sun Moon Lake in middle Taiwan was investigated for 210 Pb and 239,240 Pu in this paper, which showed that the short-term sedimentation rate is one order of magnitude greater than 14 C-based long term sedimentation rates in the lake reported previously.

TL;DR: In this paper, a sequence of amphibolite (MORB), chert, and banded iron formation associated with komatiitic amphibolites (oceanic island material) is an Archaean analogue to the modern oceanic crust grown through migration from an active ridge to a trench.

TL;DR: In this paper, the P-T evolution of sapphirine granulites has been constrained through the use of conventional geothermobarometry, internally consistent TWEEQU program and thermodynamically calibrated MAS equilibria.

TL;DR: In this article, a mechanism for the formation of shear and vein-hosted graphites is discussed, which involves the influx of CO2-rich fluids from a possible juvenile igneous source along structural pathways and precipitation of graphite under low oxygen fugacity conditions.

TL;DR: The Indosinian Longmen mountains as mentioned in this paper were formed by a series of overthrusts which were thrusted onto the craton, forming the Indosinian Longmen mountain.

TL;DR: The vanadium grossular porphyroblasts are mantled by a kelyphitic rim that consists mainly of symplectic intergrowth of fine-grained scapolite and vanadian magnetite.

TL;DR: In this paper, the authors reported several new localities of wollastonite and scapolite-bearing calc-silicate assemblages from the granulite-facies supracrustal Kerala Khondalite Belt (KKB), southern India.

TL;DR: The existence of one or more long suture zones extending from Thailand to peninsular Malaysia has been widely accepted in almost all palaeotectonic reconstruction of southeast Asia.