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An apatite U-Pb thermal history map for the northern Gawler Craton,South Australia

Geoscience Frontiers 2018年第5期9卷 1293-1308页

作者： James W.Hall Stijn Glorie Anthony J.Reid Samuel C.Boone Alan S.Collins andrew gleadow Tectonics Resources and Exploration (TRaX) Department of Earth Sciences University of Adelaide Geological Survey of South Australia Department of State Development School of Earth Sciences The University of Melbourne

Apatite U-Pb thermochronology was applied to granitoid basement samples across the northern Gawler Craton to unravel the Proterozoic, post-orogenic, cooling history and to examine the role of major fault zones during cooling. Our observations indicate that cooling following the ~2500 Ma Sleaford Orogeny and ~1700 Ma Kimban Orogeny is restricted to the Christie and Wilgena Domains of the central northern Gawler Craton. The northern Gawler Craton mainly records post-Hiltaba Event(~1590 Ma) U-Pb cooling ages. Cooling following the ~1560 Ma Kararan Orogeny is preserved within the Coober Pedy Ridge,Nawa Domain and along major shear zones within the south-western Fowler Domain. The Nawa Domain samples preserve U-Pb cooling ages that are >150 Ma younger than the samples within the Coober Pedy Ridge and Fowler Domain, indicating that later(~1300 Ma) fault movement within the Nawa Domain facilitated cooling of these samples, caused by arc collision in the Madura Province of eastern Western Australia. When compared to^(40)Ar/^(39) Ar from muscovite, biotite and hornblende, our new apatite U-Pb ages correlate well, particularly in regions of higher data density. Our data also preserve a progressive younging of U-Pb ages from the nucleus of the craton to the periphery with a stark contrast in U-Pb ages across major structures such as the Karari Shear Zone and the Southern Overthrust, which indicates the timing of reactivation of these major crustal structures. Although this interpolation was based solely on thermochronological data and did not take into account structural or other geological data, these maps are consistent with the structural architecture of the Gawler Craton and reveal the thermal footprint of known tectonic and magmatic events in the Gawler Craton.

关键词： Apatite U-Pb Gawler Craton Karari Shear Zone Thermochronology Hiltaba event

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松辽外围南部秀水盆地构造-热演化史的磷灰石裂变径迹分析

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中国地质 2023年

作者：陈树旺孙守亮张涛 Barry P.Kohn andrew gleadow 刘岩 Ling Chung 李永飞丁秋红长江大学资源与环境学院中国地质调查局沈阳地质调查中心墨尔本大学地球科学学院

【研究目的】松辽外围白垩世断陷盆地群在构造-热演化史的研究方面相对薄弱，秀水盆地作为松辽外围南部潜力较大的勘探新区，对盆地的热史-埋藏史的恢复已然成为该地区油气勘探亟待解决的重要问题。【研究方法】本文通过对秀水盆地辽法... 详细信息

【研究目的】松辽外围白垩世断陷盆地群在构造-热演化史的研究方面相对薄弱，秀水盆地作为松辽外围南部潜力较大的勘探新区，对盆地的热史-埋藏史的恢复已然成为该地区油气勘探亟待解决的重要问题。【研究方法】本文通过对秀水盆地辽法地1井5件钻井岩心样品开展磷灰石裂变径迹测试分析，首次厘定了盆地经历的热史-埋藏史及烃源岩成熟演化过程。【研究结果】结果表明，秀水盆地在早白垩世晚期地层达到最大埋深，而后持续抬升剥蚀近2000m；在初始沉降期大地热流值随时间线性升高，至120 Ma左右达到最大值，约为100.5 mW/m2。而后经历了三段式降温过程，即先快速降温，再缓慢降温，最后快速降温的过程。该热流规律与邻区张强凹陷、松辽盆地相似并可对比。【结论】辽法地1井热史-埋藏史恢复结果表明，义县组三段烃源岩在90 Ma左右进入到生油窗阶段，此后由于地层的抬升降温，热成熟度末进一步演化，从而最终定型。

关键词：埋藏史热史磷灰石裂变径迹秀水盆地松辽外围南部油气地质调查工程

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Cretaceous and Cenozoic cooling history across the ultrahigh pressure Tongbai-Dabie belt,central China,from apatite fission-track thermochronology

Cretaceous and Cenozoic cooling history across the ultrahigh...

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中国科学院地质与地球物理研究所2006学术年会

作者： Barry P.Kohn Asaf Raza andrew J.W.gleadow School of Earth Sciences The University of MelbourneMelbourneVictoria 3010Australia

The crystalline terrane of the Tongbai-Dabie region,centralChina,comprising the Earth’s largest ultrahigh-pressure(UHP) exposure was formed during Triassic collision between the Sino-Korean andYangtze *** apatite fission-track(AFT) data presented here from the UHP terrane,extends over a significantly greater area than reported in previous studies,and includes the(eastern) Dabie,the Hong’an(northwestern Dabie) and Tongbai *** new data yield ages ranging from44±3 to 142±36Ma and mean track lengths between□10 and 14.4μ.*** history models based on the AFT data taken together with published 40Ar/39Ar,K -Ar,apatite and zircon(U-Th)/He and U-Pb data,exhibit a three-stage cooling pattern that is similar across the study region,commencing with an Early Cretaceous rapid cooling event, followed by a period of relative thermal stability during which rocks remained at temperatures within the AFT partial annealing zone(□60-110℃) and ending with a possible renewed phase of accelerated cooling during Pliocene to Recent *** first cooling phase followed large-scale transtensional deformation between□140 and 110 Ma and is related to Early Cretaceous eastward tectonic escape and Pacific back arc *** this phase and the subsequent slow cooling phase,a transition period from□120 to 80Ma(to□70 to 45Ma along the Tan-Lu fault) was characterised by a relatively low cooling rate(□3-5℃/Ma).This transition is likely related to a tectonic response associated with the mid-Cretaceous subduction of the IzanagiPacific plate aswell as lithospheric extension and thinning in eastern *** present regional AFTage pattern is therefore basically controlled by the Early Cretaceous rapid cooling event,but finally shaped through active Cenozoic *** the transition phase the subsequent slow cooling phase pattern implies a net reduction in horizontal compressional stress corresponding to increased extensionrates along the continental margin due to the de

关键词： Apatite fission-track thermochronology Tectonics Denudation Ultrahigh pressure rocks Tongbai-Dabie Central China

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Postorogenic evolution of the Mesozoic Micang Shan Foreland Basin system,central China

Postorogenic evolution of the Mesozoic Micang Shan Foreland ...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Yuntao Tian Barry P.Kohn Chuanqing Zhu Ming Xu Shengbiao Hu andrew J.W.gleadow State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences

[Correction added after online publication 3 August 2010 - ’prelate’ has been changed to ’pre-late’ throughout the text].Using apatite fission track and(U-Th-Sm)/Ⅱe thermochronology,we report the low-temperature thermal history of the Mesozoic Micang Shan Foreland Basin system,central *** system,comprising the Hannan Dome hinterland,the northern Sichuan Foreland Basin and the intermediate frontal thrust belt(FB),shares a common boundary with three major tectonic terrains Mesozoic Qinling-Dabie Orogen,Mesozoic Sichuan Foreland Basin and Cenozoic elevated Tibetan *** show:(1) a relatively rapid pre-late Cretaceous cooling episode in the Hannan Dome;(2) a mid-Cenozoic cooling phase(ca.50℃at ca.30±5 Ma) within the northern Sichuan Basin;and(3) possible late Cenozoic cooling(ca.25℃at ca.16±4 Ma) within the Hannan Dome-FB,a phase which has also been reported previously from adjacent *** pre-late Cretaceous cooling episode in the Hannan Dome is attributed to coeval tectonism in nearby regions. Mid-Cenozoic cooling in the northern Sichuan Basin can possibly be attributed to either one of or a combination of shortening of the basin,onset of the Asian monsoon and drainage adjustment of the Yangtze River system,all of which are related to growth of the Tibetan *** late Cenozoic cooling in the hinterland and nearby regions is also probably related to the northeastward growth of the Tibetan ***,previous studies suggest a northeastward propagation for onset of cooling from the eastern Tibetan Plateau to western Qinling in response to northeastward lower crust flow from the central Tibetan *** timing of apparent late Cenozoic cooling in the Hannan Dome hinterland,at an intermediate locality,is not consistent with this trend,and supports a previous model suggesting northeastern growth of the Tibetan Plateau through reactivation of WE trending strike-slip faults.

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Late Mesozoic and Cenozoic thermotectonic evolution along a transect from the north China craton through the Qinling orogen into the Yangtze craton,central China

Late Mesozoic and Cenozoic thermotectonic evolution along a ...

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中国科学院地质与地球物理研究所2006学术年会

作者： Asaf Raza Kyoungwon Min Barry P.Kohn Peter W.Reiners Richard A.Ketcham andrew J.W.gleadow School of Earth Sciences University of MelbourneMelbourneAustralia Department of Geology and Geophysics Yale UniversityNew HavenConnecticutUSA Department of Geological Sciences University of Texas at AustinAustinTexasUSA

Cretaceous and Cenozoic reactivation of the Triassic Qinling-Dabie orogen between the north China and Yangtze cratons resulted from the combined effects of Pacific subduction-back-arc extension in east China and collisions in west *** report new apatite fission track and apatite and zircon(U-Th)/He data from east Qinling along a >400-km-long N-S transect from Huashan through the Qinling orogen to *** ages show a general pattern of younging *** major cooling phases are defined by modeling the multiple thermochronologic data *** first phase occurred locally in the North and South Qinling during the late Triassic to early Jurassic,following heating associated with the Triassic Yangtze subduction and exhumation of the Wudang metamorphic core complex on the cratonal edge.A second phase represents regional exhumation between 100 and 60 Ma,coeval with rifting marked by the Late Cretaceous-Eocene(K2-E) red bed deposition in eastern China and possibly indicating a link with Pacific subduction-back-arc extension in eastern China;however,it may also have been superimposed by eastward tectonic escape resulting from the Lhasa-West Burma-Qiangtang-Indochina *** third cooling phase was initiated at 5 Ma exclusively in the north Qinling and in the footwall of the graben-bounding normal fault of the Weihe graben in the Lesser *** suggest the third phase was related to reactivation of the Qinling fault system as a result of eastward tectonic escape imposed by the India-Asia collision at 0 Ma.

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Detrital zircon(U-Th)/He thermochronometry of the Mesozoic Daba Shan Foreland Basin,central China:Evidence for timing of post-orogenic denudation

Detrital zircon(U-Th)/He thermochronometry of the Mesozoic D...

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中国科学院地质与地球物理研究所2012年度（第12届）学术年会

作者： Yuntao Tian Nansheng Qiu Barry P.Kohn Chuanqing Zhu Shengbiao Hu andrew J.W.gleadow Brent I.A.Mclnnes State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of Sciences State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum CSIRO Exploration & Mining KensingtonWestern AustraliaAustralia

The timing of the transition of a peripheral foreland basin from underfilled to overfilled provides important insights into the post-orogenic dynamics of its coupled orogenic *** information is lacking in the Mesozoic foreland basins surrounding the Qinling Orogen,central China,such as the Daba Shan Foreland Basin(DSFB),the northeastern part of the Sichuan *** an effort to constrain the timing of maximum burial and onset of denudation,we report detrital zircon(U-Th)/He(ZHe) data from four deep boreholes in the *** show that ZHe ages from the oldest foreland basin formations(Upper Triassic-lower Middle Jurassic) are mostly younger than their depositional age,whereas non-reset ZHe ages characterize younger *** suggests that the oldest strata attained maximum temperatures between -130℃and 200℃(ZHe partial retention zone),which is consistent with previous independent paleotemperatures (organic matter reflectance and illite crystallinity) reported in two of the boreholes and another nearby. The fully reset ages apparently show the youngest peaks at -80 Ma and -100 Ma,which are interpreted as the minimum constraints on the timing of maximum basinal burial and subsequent *** that the regional deposition has lasted to Aptian time,it is proposed that the onset of the basin exhumation in the DSFB started at Aptian-Albian time(～100-125 Ma),heralding the termination of regional tectonic shortening in the hinterland(Southern Qinling).

关键词： Daba Shan Foreland Basin Sichuan Basin Southern Qinling Zircon(U-Th)/He Denudation Post-orogenic evolution

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