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| 1 | On ultrahigh temperature crustal metamorphism:Phase equilibria,trace element thermometry,bulk composition,heat sources,timescales and tectonic settings显示文摘Ultrahigh temperature(UHT) metamorphism is the most thermally extreme form of regional crustal metamorphism,with temperatures exceeding 900℃.UHT crustal metamorphism is recognised in more than 50 localities globally in the metaniorphic rock record and is accepted as 'normal' in the spectrum of regional crustal processes.UHT metamorphism is typically identified on the basis of diagnostic mineral assemblages such as sapphirine+ quartz,orthopyroxene + sillimanite ± quartz and osumilite in Mg-AIrich rock compositions,now usually coupled with pseudosection-based thermobarometry using internally-consistent thermodynamic data sets and/or Al-in-Orthopyroxene and ternary feldspar thermobarometry.Significant progress in the understanding of regional UHT metamorphism in recent years includes:(1) development of a ferric iron activity-composition thermodynamic model for sapphirine,allowing phase diagram calculations for oxidised rock compositions:(2) quantification of UHT conditions via trace element thermometry,with Zr-in-rutile more commonly recording higher temperatures than Ti-in-zircon.Rutile is likely to be stable at peak UHT conditions whereas zircon may only grow as UHT rocks are cooling.In addition,the extent to which Zr diffuses out of rutile is controlled by chemical communication with zircon;(3) more fully recognising and utilising temperature-dependent thermal properties of the crust,and the possible range of heat sources causing metamorphism in geodynamic modelling studies:(4) recognising that crust partially melted either in a previous event or earlier in a long-duration event has greater capacity than fertile,unmelted crust to achieve UHT conditions due to the heat energy consumed by partial melting reactions:(5) more strongly linking U-Pb geochronological data from zircon and monazite to P-T points or path segments through using Y + REE partitioning between accessory and major phases,as well as phase diagrams incorporating Zr and REE;and(6)improved insight into the settings and factors responsible for UHT metamorphism via geodynamic forward models.These models suggest that regional UHT metamorphism is,principally,geodynamically related to subduction,coupled with elevated crustal radiogenic heat generation rates. | David E.Kelsey Martin Hand | 2015 | Geoscience Frontiers2015，6，3： | 28 |
| 2 | Process automation and modeling for consistent quality显示文摘 | Martin L Hand M | 1990 | Steel Times International1990，14，2： | 1 |
| 3 | A Branch and Cut algorithm for Hub Location Problems with Single Assignment显示文摘 | MARTINE L HANDE Y ERIC G | 2005 | Mathematical Programming2005，102，2： | 1 |
| 4 | A branch and cut algorithm for hub location problems with single assignment显示文摘 | Martine L Hande Y Eric G | 2008 | Mathematical Programming2008，102，2： | 1 |
| 5 | Distinguishing Between Stroke and Mimic at the Bedside: The Brain Attack Study显示文摘 | Peter J. Hand Joseph Kwan Richard I. Lindley Martin S. Dennis Joanna M. Wardlaw | 2006 | Stroke2006，，3： | 1 |
| 6 | A branch and cut algorithm for hub location problems with single assignment 显示文摘 | Martine L Hande Y Eric G | 2005 | Mathematical Programming2005，102，2： | 1 |
| 7 | Winding down in a Qubic town:a case study of Schefferville显示文摘 | Bradbury J Hand St Martin I | 1983 | The Canadian Geographer1983，27，2： | 1 |
| 8 | Factors Affecting the Implementation of Argument in the Elementary Science Classroom. A Longitudinal Case Study显示文摘 | Anita M. Martin Brian Hand | 2009 | Research in Science Education2009，，1： | 1 |
| 9 | Approxima repeated-measures shrinkage显示文摘 | BRENTNALL Adam R CROWDER Martin HAND David J | 2010 | Computatioral Statistics & Data Analysis2010，55，： | 1 |
| 10 | Laser ablation(in situ)Lu-Hf dating of magmatic fluorite and hydrothermal fluorite-bearing veins显示文摘Fluorite(CaF_(2))is a common hydrothermal mineral,which precipitates from fluorine-rich fluids with an exceptional capacity to transport metals and Rare Earth Elements(REEs).Hence,the ability to date fluorite has important implications for understanding the timing of metal transport in hydrothermal systems.Here we present,for the first time,fluorite Lu-Hf dates from fluorite-carbonate veins from the Olympic Cu-Au Province in South Australia.The fluorite dates were obtained in situ using the recently developed LA-ICP-MS/MS Lu-Hf dating method.A fluorite-calcite age of 1588±19 Ma was obtained for the Torrens Dam prospect,consistent with the timing of the formation of the nearby Olympic Dam iron-oxide copper gold Breccia Complex.Veins in the overlying Neoproterozoic successions were dated at 502±14 Ma,indicating a temporal link between Cu-sulphide remobilisation and the Delamerian Orogeny.Additionally,we present a multi-session reproducible date for magmatic fluorite from a monzogranite in the Pilbara Craton(Lu-Hf age of 2866±19 Ma).This age is consistent with a garnet Lu-Hf age from the same sample(2850±12 Ma)and holds potential to be developed into a secondary reference material for future fluorite Lu-Hf dating. | Stijn Glorie Jacob Mulder Martin Hand Adrian Fabris Alexander Simpson Sarah Gilbert | 2023 | Geoscience Frontiers2023，14，6： | 0 |
| 11 | Magmatism and metamorphism at ca. 1.45 Ga in the northern Gawler Craton: The Australian record of rifting within Nuna(Columbia)显示文摘U-Pb monazite and zircon geochronology and calculated metamorphic phase diagrams from drill holes in the northern Gawler Craton, southern Australia, reveal the presence of ca. 1.45 Ga magmatism and metamorphism. Magmatism and granulite facies metamorphism of this age has not previously been recognised in the Gawler Craton. The magmatic rocks have steep LREE-enriched patterns and high Ga/Al values, suggesting they are A-type granites. Calculated metamorphic forward models suggest that this event was associated with high apparent thermal gradients and reached pressures of 3.2 -5.4 kbar and temperatures of 775-815℃. The high apparent thermal gradients may reflect pluton-enhanced metamorphism, consistent with the presence of A-type granites. The recognition of ca. 1.45 Ga tectonism in the northern Gawler Craton is added to a compilation of ca. 1.50 -1.40 Ga magmatism, shear zone reactivation, rift basin development and isotope resetting throughout the South and North Australian Cratons that shows that this event was widespread in eastern Proterozoic Australia. This event is stylistically similar to ca. 1.45 Ga A-type magmatism and high thermal gradient metamorphism in Laurentia in this interval and provides further support for a connection between Australia and Laurentia during the Mesoproterozoic. The tectonic setting of the 1.50-1.40 Ga event is unclear but may record rifting within the Nuna(or Columbia) supercontinent, or a period of intracontinental extension within a long-lived convergent setting. | Laura J.Morrissey Karin M.Barovich Martin Hand Katherine E.Howard Justin L.Payne | 2019 | Geoscience Frontiers2019，10，1： | 0 |
| 12 | Reappraising the P-T evolution of the Rogaland-Vest Agder Sector,southwestern Norway显示文摘The Rogaland-Vest Agder Sector of southwestern Norway comprises high-grade metamorphic rocks intruded by voluminous plutonic bodies that include the ~1000 km^2 Rogaland Igneous Complex(RIC).New petrographic observations and thermodynamic phase equilibria modelling of three metapelitic samples collected at various distances(30 km,10 km and ~ 10 m) from one of the main bodies of RIC anorthosite were undertaken to assess two alternative P-T-t models for the metamorphic evolution of the area.The results are consistent with a revised two-phase evolution.Regional metamorphism followed a clockwise P-T path reaching peak conditions of ~ 850-950 ℃ and ~7-8 kbar at ~1035 Ma followed by high-temperature decompression to ~5 kbar at ~950 Ma,and resulted in extensive anatexis and melt loss to produce highly residual rocks.Subsequent emplacement of the RIC at ~930 Ma caused regional-scale contact metamorphism that affected country rocks 10 km or more from their contact with the anorthosite.This thermal overprint is expressed in the sample proximal to the anorthosite by replacement of sillimanite by coarse intergrowths of cordierite plus spinel and growth of a second generation of garnet,and in the intermediate(10 km) sample by replacement of sapphirine by coarse intergrowths of cordierite,spinel and biotite.The formation of late biotite in the intermediate sample may suggest the rocks retained small quantities of melt produced by regional metamorphism and remained at temperatures above the solidus for up to 100 Ma.Our results are more consistent with an accretionary rather than a collisional model for the Sveconorwegian Orogen. | Eleanore Blereau Tim E.Johnson Chris Clark Richard J.M.Taylor Peter D.Kinny Martin Hand | 2017 | Geoscience Frontiers2017，8，1： | 0 |
| 13 | In situ Lu–Hf phosphate geochronology:Progress towards a new tool for space exploration显示文摘Geochronology is fundamental to understanding planetary evolution.However,as space exploration continues to expand,traditional dating methods,involving complex laboratory processes,are generally not realistic for unmanned space applications.Campaign-style planetary exploration missions require dating methods that can(1)rapidly resolve age information on small samples,(2)be applied to minerals common in mafic rocks,and(3)be based on technologies that could be installed on future rover systems.We demonstrate the application of rapid in situ microanalytical Lu–Hf phosphate geochronology using samples of pallasite meteorites,which are representative examples of the deep interiors of differentiated planetoids that are generally difficult to date.Individual pallasites were dated by laser ablation tandem mass-spectrometry(LA-ICP-MS/MS),demonstrating a rapid novel method for exploring planetary evolution.Derived formation ages for individual pallasites agree with traditional methods and have<2%uncertainty,opening an avenue of opportunity for remote micro-analytical space exploration. | Stijn Glorie Thomas Burke Martin Hand Alexander Simpson Sarah Gilbert Benjamin Wade | 2022 | Geoscience Frontiers2022，13，3： | 0 |
| 14 | Linking the Gawler Craton and Mount Isa Province through hydrothermal systems in the Peake and Denison Domain,northeastern Gawler Craton显示文摘Tectonic reconstructions of Proterozoic Australia commonly place the Peake and Denison Domain of the northeastern Gawler Craton at the interface between the North and South Australian cratons prior to the reconfiguration of Australia’s main tectonic components in the Mesoproterozoic.However,this reconstruction is largely based on palaeomagnetic data as the geological correlations between these regions are currently limited,particularly during the Mesoproterozoic.The early Mesoproterozoic period is significant as it corresponds to major IOCG mineralization in the eastern Gawler Craton between 1600 Ma and 1575 Ma,and IOCG mineralization in the Mount Isa Province largely between 1550 Ma and 1490 Ma.Therefore,determining the relationship of the Peake and Denison Domain to the Gawler Craton and Mount Isa Province during this period is essential to evaluating mineral prospectivity in the northeastern Gawler Craton.New U–Pb LA-ICP-MS geochronology on zircon and titanite improves our understanding of the tectonothermal and hydrothermal history the Peake and Denison Domain during the latePalaeoproterozoic,early-Mesoproterozoic and the Cambrian–Ordovician periods.Titanite formed within largely calc-silicate alteration assemblages indicates the Peake and Denison Domain has a protracted history of hydrothermal activity,recording events at c.1565 Ma,1530–1515 Ma,c.1500 Ma,c.1465 Ma and c.490 Ma.The highly calcic nature of the c.1565–1500 Ma alteration in the Peake and Denison Domain shares strong similarities in age and character to the regional calcic-sodic alteration recorded in the Mount Isa Province.We suggest the two regions were influenced by similar hydrothermal systems during the early Mesoproterozoic,supporting reconstruction models that place the Peake and Denison Domain near the Mount Isa Province during the early-Mesoproterozoic.This highlights the prospectivity of the Peake and Denison Domain for Isan-style IOCG mineralization,but requires consideration of the post-1500 Ma rotation of prospective structures. | Mitchell J.Bockmann Justin L.Payne Martin Hand Laura J.Morrissey Antonio P.Belperio | 2023 | Geoscience Frontiers2023，14，5： | 0 |
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