The Turfan Depression of the Western Turfan Basin, Northwest China: Aspects of Subsidence and Relation to Lateral Escape Tectonics

1998 ◽  
Vol 40 (4) ◽  
pp. 325-334 ◽  
Author(s):  
Frank Mattern
Keyword(s):  
Northwest China ◽  
Escape Tectonics ◽  
Lateral Escape

scholarly journals A SUÍTE CÓRREGO TAQUARI NO ANTICLINAL DE ITACAMBIRA, BACIA DO RIO MACAÚBAS (MG): MAGMATISMO BÁSICO TARDI-EDIACARANO (CA. 560 MA) NO DOMÍNIO EXTERNO DO ORÓGENO ARAÇUAÍ

2013 ◽  
Author(s):  
Maximiliano Martins ◽  
Marly Babinsk ◽  
Carlos Maurício Noce ◽  
Gláucia Nascimento Queiroga ◽  
Antônio Carlos Pedrosa-Soares ◽  
...  
Keyword(s):  
Small Population ◽  
Mafic Magmatism ◽  
Fold And Thrust Belt ◽  
Minas Gerais State ◽  
Facies Metamorphism ◽  
Escape Tectonics ◽  
Lateral Escape ◽  
Araçuaí Orogen ◽  
Method Show ◽  
Greenschist Facies Metamorphism

No setor central do cinturão de dobramentos e empurrões da Serra do Espinhaço, domínio externo ocidental do Orógeno Araçuaí, situa-se o Anticlinal de Itacambira onde foi identificado um conjunto de diques gabróicos, pouco deformados e metamorfisados na fácies xisto verde. Um desses diques, englobados na Suíte Metaígnea Córrego do Taquari, tem assinatura litoquímica de toleíito intraplaca, idade-modelo Sm-Nd (TDM) em torno de 1,8 Ga e épsilon Nd negativo. Deste dique extraiu-se grãos de zircão para datação pelo método U-Pb (SHRIMP). Alguns destes grãos são herdados e evidenciam assimilação de cristais de zircão do Paleoproterozóico e Mesoproterozóico. A maior parte dos grãos são cristais euédricos, magmáticos, e suas análises U-Pb resultaram na idade de 560 ± 6 Ma para a cristalização magmática da Suíte Córrego Taquari. Esta suíte registra um sítio transtensivo formado e preenchido pelo magma máfico no limiar dos estágios sincolisional e tardi-colisional do Orógeno Araçuaí, provavelmente relacionado ao início dos fenômenos de escape lateral que afetaram este orógeno.Palavras-chave: diques máficos, Ediacarano, Orógeno AraçuaíABSTRACT: THE CÓRREGO TAQUARI SUITE IN THE ITACAMBIRA ANTICLINE, MACAÚBAS RIVER BASIN, MINAS GERAIS STATE: LATE EDIACARAN (CA. 560 MA) MAFIC MAGMATISM IN THE EXTERNAL TECTONIC DOMAIN OF THE ARAÇUAÍ OROGEN. In the central sector of the Serra do Espinhaço fold-and-thrust belt, western tectonic domain of the Neoproterozoic Araçuaí orogen, occurs the Itacambira anticline where a swarm of Late Ediacaran metamafic bodies were recently discovered, the Córrego Taquari meta-igneous suite. Most of these bodies occur as dykes cutting across units of the Espinhaço Supergroup and Macaúbas Group, and show incipient deformation and low greenschist facies metamorphism. The lithochemical and Sm-Nd isotopic data (negative epsilon Nd and TDM model age around 1.8 Ga) point to a tholeiitic intraplate signature. Twenty two zircon grains, extracted from a sample of a gabbroic dyke and analysed by the U-Pb (SHRIMP) method, show a small population of Paleoproterozoic and Mesoproterozoic inherited grains, and a major population of magmatic euhedral crystals. The less discordant, euhedral zircon crystals yielded the U-Pb (SHRIMP) age of 560 ± 6 Ma for the magmatic crystallization age of the Córrego Taquari Suite. This mafic magmatism records a Late Ediacaran extensional episode, probably related to the beginning of the lateral escape tectonics that took place in the late collisional stage of the Araçuaí orogen.Keywords: mafic dykes, Ediacaran, Araçuaí Orogen

Indo-Asian Collision: Transition from Compression to Lateral Escape Tectonics

2013 ◽  
Vol 87 (s1) ◽  
pp. 112-184 ◽  
Author(s):  
Zhiqin XU ◽  
Jean-Pierre BURG ◽  
Qin WANG ◽  
Haibing LI
Keyword(s):  
Escape Tectonics ◽  
Lateral Escape

scholarly journals Late Ediacaran lateral-escape tectonics as recorded by the Patos shear zone (Borborema Province, NE Brazil)

2021 ◽  
Vol 51 (2) ◽  
Author(s):  
Carlos José Archanjo ◽  
Maria Helena Bezerra Maia de Hollanda ◽  
Luis Gustavo Ferreira Viegas
Keyword(s):  
Shear Zone ◽  
Borborema Province ◽  
Escape Tectonics ◽  
Lateral Escape

Moss coverage improves the microclimates of subalpine forests: implications of Qinghai spruce recruitment in Qilian Mountains, northwest China

2019 ◽  
Vol 51 (5) ◽  
Author(s):  
Qingtao Wang ◽  
Chuanyan Zhao ◽  
Yunpu Zheng ◽  
Muhammad Waseem Ashiq ◽  
Xiaoping Wang ◽  
...  
Keyword(s):  
Northwest China ◽  
Qilian Mountains ◽  
Subalpine Forests ◽  
Qinghai Spruce

PETROGRAPHIC, XRD, AND CLUMPED ISOTOPE STUDY OF A CRETACEOUS DOLOMITIC LAKE IN NORTHWEST CHINA

2017 ◽  
Author(s):  
Marina B. Suarez ◽  
◽  
G. Ludvigson ◽  
Luis A. Gonzalez ◽  
Hailu You
Keyword(s):  
Northwest China ◽  
Isotope Study ◽  
Clumped Isotope
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