检索结果-南通市图书馆

When will it end? Long-lived intracontinental reactivation in central Australia

Geoscience Frontiers 2019年第1期10卷 149-164页

作者： raphael Quentin de Gromard Christopher L.Kirkland Heather M.Howard Michael T.D.Wingate Fred Jourdan Brent I.A.Mc Innes Martin Danisik Noreen J.Evans Bradley J.McDonald r.hugh smithies Geological Survey of Western Australia Department of Mines Industry Regulation and Safety School of Earth and Planetary Science/John de Laeter Centre/TIGer Curtin University

The post-Mesoproterozoic tectonometamorphic history of the Musgrave Province, central Australia, has previously been solely attributed to intracontinental compressional deformation during the 580 -520 Ma Petermann Orogeny. However, our new structurally controlled multi-mineral geochronology results,from two north-trending transects, indicate protracted reactivation of the Australian continental interior over ca. 715 million years. The earliest events are identified in the hinterland of the orogen along the western transect. The first tectonothermal event, at ca. 715 Ma, is indicated by40 Ar/39 Ar muscovite and U e Pb titanite ages. Another previously unrecognised tectonometamorphic event is dated at ca. 630 Ma by Ue Pb analyses of metamorphic zircon rims. This event was followed by continuous cooling and exhumation of the hinterland and core of the orogen along numerous faults, including the Woodroffe Thrust,from ca. 625 Ma to 565 Ma as indicated by muscovite, biotite, and hornblende40 Ar/39 Ar cooling ages. We therefore propose that the Petermann Orogeny commenced as early as ca. 630 Ma. Along the eastern transect,40 Ar/39 Ar muscovite and zircon(Ue Th)/He data indicate exhumation of the foreland fold and thrust system to shallow crustal levels between ca. 550 Ma and 520 Ma, while the core of the orogen was undergoing exhumation to mid-crustal levels and cooling below 600-660℃. Subsequent cooling to 150 -220℃ of the core of the orogen occurred between ca. 480 Ma and 400 Ma(zircon [Ue Th]/He data)during reactivation of the Woodroffe Thrust, coincident with the 450 -300 Ma Alice Springs *** of the footwall of the Woodroffe Thrust to shallow depths occurred at ca. 200 Ma. More recent tectonic activity is also evident as on the 21 May, 2016(Sydney date), a magnitude 6.1 earthquake occurred, and the resolved focal mechanism indicates that compressive stress and exhumation along the Woodroffe Thrust is continuing to the present day. Overall, these results

关键词： Intracontinental deformation Thermochronology Petermann orogen Musgrave Province Plate tectonics Cratonization

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Ultra-hot Mesoproterozoic evolution of intracontinental central Australia

引用

Geoscience Frontiers 2015年第1期6卷 23-37页

作者： Weronika Gorczyk hugh smithies Fawna Korhonen Heather Howard raphael Quentin De Gromard Center for Exploration Targeting School of Earth and EnvironmentThe University of Western Australia Geological Survey of Western Australia

The Musgrave Province developed at the nexus of the North, West and South Australian cratons and its Mesoproterozoic evolution incorporates a 100 Ma period of ultra-high temperature （UHT） meta- morphism from ca. 1220 to ca. 1120 Ma. This was accompanied by high-temperature A-type granitic magmatism over an 80 Ma period, sourced in part from mantle-derived components and emplaced as a series of pulsed events that also coincide with peaks in UHT metamorphism. The tectonic setting for this thermal event （the Musgrave Orogeny） is thought to have been intracontinental and the lithospheric architecture of the region is suggested to have had a major influence on the thermal evolution. We use a series of two dimensional, fully coupled thermo-mechanical-petrological numerical models to investi- gate the plausibility of initiating and prolonging UHT conditions under model setup conditions appro- priate to the inferred tectonic setting and lithospheric architecture of the Musgrave Province. The results support the inferred tectonic framework for the Musgrave Orogeny, predicting periods of UHT meta- morphism of up to 70 Ma, accompanied by thin crust and extensive magmatism derived from both crustal and mantle sources. The results also appear to be critically dependent upon the specific location of the Mus^rave Province. constrained between thicker cratonic masses.

关键词： Ultra-high temperature (UHT) metamorphism Numerical modeling Intra-continental orogeny

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Felsic Magmatic Evolution and the role of Post-Collisional Process in Continental Crustal Growth at Convergent Margins: Insights from the Western Part of the Central Qilian Belt, Northwestern China

引用

Acta Geologica Sinica(English Edition) 2015年第A02期89卷 92-93页

作者： WANG Chao LI rong-She smithies r. hugh LI Meng PENG Yan State Key Laboratory of Continental Dynamics Department of Geology Northwest University Xi'an 710069 China Xi'an Center of Geological Survey China Geological Survey Xi'an 710054 China Geological Survey of Western Australia 100 Plain Street East Perth WA 6004 Australia

Long-lived early Palaeozoic magmatism in the Qilian orogen, of the Northeastern Tibet Plateau, formed an extensive linear belt of plutonic and volcanic rocks as a result of subduction of the Proto-Tethyan Ocean beneat... 详细信息

关键词： FELSIC rocks rESEArCH MAGMATISM GEOCHEMISTrY ZIrCON ISOTOPES PALEOZOIC Era

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：