Interpretation of 2014–2015 deep crustal seismic reflection and magnetotelluric data has revised the architecture and geodynamic framework of western Queensland, with implications for the assembly and dispersal of the supercontinents Nuna, Rodinia and Gondwana. In the Mount Isa Province, crustal-scale boundaries of the Leichhardt River Domain, Kalkadoon-Leichhardt Domain and Eastern Subprovince are mapped in the third dimension. The Leichhardt River and Kalkadoon-Leichhardt domains have similar Nd isotopic T model ages to provinces to the west, indicating they were part of ancestral North Australian Craton (NAC); the Eastern Subprovince is a separate terrane, with the Pilgrim Fault a collisional suture. The Gidyea Suture Zone separates the Mount Isa Province from the subsurface Numil Seismic Province. To the east, the west-dipping Yappar Fault separates east-dipping structures in the west from west-dipping structures in the east, forming a classic doubly vergent orogen within the upper plate of a convergent margin. The northwestern boundary of the Bernfels Seismic Province, the Kynuna Fault, truncates the Gidyea Suture Zone, implying this seismic province was welded to the NAC prior to initial deposition of the Etheridge Province. The Cork Fault truncates the north-south grain of the Mount Isa Province; the easternmost part of the NAC has been excised, presumably during breakup of Nuna. The subsurface Brighton Downs Seismic Province, formerly part of the northern Thomson Orogen, is a discrete seismic province, located between the NAC and the Thomson Orogen, and welded to the NAC during the accretion of Rodinia. Basement to the Thomson Orogen is a collage of microplates, accreted to the Brighton Downs Seismic Province during the assembly of Gondwana. By 530 Ma, eastern Australia faced an open Pacific Ocean, with the Thomson Orogen in a backarc setting. Thus, northeastern Australia contains a record of repeated continental accretion and breakup over at least three supercontinent cycles.

中文翻译：

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基于深地震反射剖面的澳大利亚昆士兰州西部地壳结构和构造发展：对元古代大陆聚合和扩散的影响

对2014-2015年深地壳地震反射和大地电磁数据的解释修正了昆士兰州西部的结构和地球动力学框架，对努纳、罗迪尼亚和冈瓦纳超大陆的聚集和分散产生了影响。在伊萨山省，莱卡特河域、卡尔卡杜恩-莱卡特域和东部副省的地壳尺度边界绘制在三维空间中。 Leichhardt River 和 Kalkadoon-Leichhardt 域与西部省份具有相似的 Nd 同位素 T 模型年龄，表明它们是祖先北澳大利亚克拉通 (NAC) 的一部分；东部副省是一个独立的地体，朝圣断层是一个碰撞缝合线。吉迪亚缝合带将伊萨山省与地下努米尔地震省分开。在东部，西倾的雅帕尔断层将西部的东倾构造与东部的西倾构造分开，在会聚边缘的上板块内形成典型的双聚合造山带。伯恩费尔斯地震省的西北边界，即基努纳断层，截断了吉迪亚缝合带，这意味着该地震省在埃瑟里奇省最初沉积之前就已与 NAC 熔接在一起。科克断层截断了伊萨山省的南北走向； NAC 的最东部部分已被切除，大概是在努纳解体期间。地下布莱顿唐斯地震省以前是汤姆森造山带北部的一部分，是一个离散的地震省，位于 NAC 和汤姆森造山带之间，并在罗迪尼亚增生期间与 NAC 熔合。汤姆森造山带的地下室是由微板块组成的拼贴画，在冈瓦纳大陆组装期间堆积到布莱顿唐斯地震省。到 530 Ma，澳大利亚东部面临着开阔的太平洋，汤姆森造山带处于弧后环境。因此，澳大利亚东北部有至少三个超大陆周期重复大陆吸积和分裂的记录。