Refining accretionary orogen models for the Tasmanides of eastern Australia

Glen, R. A.

doi:10.1080/08120099.2013.772537

Cited by 172 publications

(196 citation statements)

References 297 publications

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“…In the north, the Thomson Orogen has been delineated from the Silurian-Devonian Mossman Orogen (Withnall and Henderson, 2012). This separation represents a division of pre-Benambran rocks (i.e., the Thomson Orogen) from those that were deposited after the Benambran Orogeny (i.e., the Mossman Orogen; Glen, 2013). 40 Ar/ 39 Ar cooling ages reported in this study from granites are similar to ages reported in metasediments of the Lachlan Orogen (Foster et al, 1999), suggesting that igneous intrusions into the Thomson Orogen may be related to the Benambran Orogeny.…”

Section: Benambran Orogenysupporting

confidence: 74%

“…Orogen (e.g., Glen, 2013) and Thomson Orogen (Kotischin, et al), but the extent to which it affected the Thomson Orogen is not well defined (Spampinato et al, 2015a). In the north, the Thomson Orogen has been delineated from the Silurian-Devonian Mossman Orogen (Withnall and Henderson, 2012).…”

Section: Benambran Orogenymentioning

confidence: 99%

“…Rifting of the supercontinent Rodinia is believed to have occurred in two phases: the first at 800-750 Ma (Fergusson and Henderson, 2015), and the second at 600-580 Ma (Glen, 2013). Following rifting, the eastern margin of the Australian continent is approximated by the Tasman Line, which forms the western boundary of the Thomson Orogen.…”

Section: Rodinia Riftingmentioning

confidence: 99%

“…This long history has been most thoroughly examined in easternmost Australia, where the New England Orogen contains most of the important features (e.g., magmatic arc, accretionary prism, forearc basin) of a convergent margin (e.g., Leitch, 1978;Coney et al, 1990;Li et al, 2012), and in southern Australia, where the Lachlan and Delamerian Orogens preserve evidence for a multitude of events including accretion, arc magmatism, and continental extension (Glen, 2013). Much of our understanding of the timing of these events comes from 40 Ar/ 39 Ar studies of basement rocks in the Lachlan, Delamerian, and New…”

Section: Introductionmentioning

confidence: 99%

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Thermochronology and stratigraphy of the Thomson Orogen, north-eastern Australia

Beckinsale¹

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Section: Benambran Orogenysupporting

confidence: 74%

Section: Benambran Orogenymentioning

confidence: 99%

Section: Rodinia Riftingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermochronology and stratigraphy of the Thomson Orogen, north-eastern Australia

Beckinsale¹

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“…This process indicates that the lithosphere remained thin until the accretion terminated, because it was being stretched after each collision phase. The earlier orogens were originally thought to contain a greater proportion of older crust, but this has been recently revised based on dating of basement from new wells (Glen, 2005;2013). Many Proterozoic microcontinents were rejuvenated during accretion and were intruded by granitoids.…”

Section: Eastern Australiamentioning

confidence: 99%

Basin formation by thermal subsidence of accretionary orogens

2015

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Additional information:Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-pro t purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. Response to referees of Holt et al.We thank the three referees for their extremely helpful comments on the submitted paper, and appreciate the time that must have been needed. We have paid close attention to their suggestions, and feel that the revised paper greatly benefits from the constructive criticism. We take each referee's comments in turn, below, and offer a point-by-point account of how we have addressed them in the revised version. Our responses are preceded by the # symbol and are in italics.1. Five basins were chosen for the analysis. Why were these basins chosen? The main goal of this paper is to show that a lithosphere cooling model is a fundamental process in accretionary orogens. Therefore, the choice of the case studies needs to be carefully justified to show that these are 'typical' basins (i.e., there are no special conditions that could lead to a subsidence pattern similar to that of the cooling model). This is done in places in the manuscript, but it should be more explicit. At the moment, it isn't clear if the five basins are representative of accretionary orogens or if they were chosen because they fit the cooling model. 2. The cooling model is only vaguely described and no quantitative details are provided. Perhaps there should be a separate section with a conceptual description of the cooling model -why is it expected that accretionary crust has a thin initial lithosphere, what maintains the thin lithosphere, and what happens to cause the lithosphere to start to cool? It is stated that this model is different from a mantle delamination model (top of pg 4), but the 'alternate' mechanism for creating thin lithosphere is not clearly described. #Text has been added to explain the cooling model in section 2. There is also a longer description of why accretionary crust starts with thin mantle lithosphere in the Introduction. Both of these items were first described in Holt et al (2010): the only reason they were not originally given more length in this paper is that we thought readers would prefer a terse version of the material!In addition, the actual numerical values used in the cooling model need to be given. Readers are referred to the Holt et al. (2010) paper, but it isn't clear how this method was applied to the current study. For example: Do all regions start with a 20 km thick mantle lithosphere or does this vary (as implied on pg 15, line ~18: "an unusually thin initial lithosphere…is required")? How was crustal thickness var...

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Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton

et al. 2014

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The Tarim Craton, located in the center of Asia, was involved in the assembly and breakup of the Rodinia supercontinent during the Neoproterozoic and the subduction-accretion of the Central Asian Orogenic Belt (CAOB) during the Paleozoic. However, its tectonic evolution during these events is controversial, and a link between the Neoproterozoic and Paleozoic tectonic processes is missing. Here we present zircon U-Pb ages, Hf isotopes, and whole-rock geochemical data for the extensive granitoids in the western Kuruktag area, northeastern Tarim Craton. Three distinct periods of granitoid magmatism are evident: circa 830-820 Ma, 660-630 Ma, and 420-400 Ma. The magma sources, melting conditions (pressure, temperature, and water availability), and tectonic settings of various granitoids from each period are determined. Based on our results and the geological, geochronological, geochemical, and isotopic data from adjacent areas, a long-lived accretionary orogenic model is proposed. This model involves an early phase (circa 950-780 Ma) of southward advancing accretion from the Tianshan to northern Tarim and a late phase (circa 780-600 Ma) of northward retreating accretion, followed by back-arc opening and subsequent bidirectional subduction (circa 460-400 Ma) of a composite back-arc basin (i.e., the South Tianshan Ocean). Our model highlights a long-lived accretionary history of the southwestern CAOB, which may have initiated as part of the circum-Rodinia subduction zone and was comparable with events occurring at the southern margin of the Siberian Craton, thus challenging the traditional southward migrating accretionary models for the CAOB.

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Refining accretionary orogen models for the Tasmanides of eastern Australia

Cited by 172 publications

References 297 publications

Thermochronology and stratigraphy of the Thomson Orogen, north-eastern Australia

Thermochronology and stratigraphy of the Thomson Orogen, north-eastern Australia

Basin formation by thermal subsidence of accretionary orogens

Neoproterozoic to Paleozoic long-lived accretionary orogeny in the northern Tarim Craton

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