[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-1-en-105":3,"doc-seo-177947-105":53,"doc-detail-177947-en":127},{"code":4,"msg":5,"data":6},0,"success",[7,14,19,24,29,34,39,44,49],{"id":8,"doc_module":9,"doc_module_name":10,"category_name":11,"show_sort_weight":12,"slug":13},11,1,"Template","Presentations",90,"presentations",{"id":15,"doc_module":9,"doc_module_name":10,"category_name":16,"show_sort_weight":17,"slug":18},12,"Resumes",80,"resumes",{"id":20,"doc_module":9,"doc_module_name":10,"category_name":21,"show_sort_weight":22,"slug":23},14,"Invoices",70,"invoices",{"id":25,"doc_module":9,"doc_module_name":10,"category_name":26,"show_sort_weight":27,"slug":28},15,"Posters",60,"posters",{"id":30,"doc_module":9,"doc_module_name":10,"category_name":31,"show_sort_weight":32,"slug":33},16,"Social Media",50,"social-media",{"id":35,"doc_module":9,"doc_module_name":10,"category_name":36,"show_sort_weight":37,"slug":38},17,"Forms",40,"forms",{"id":40,"doc_module":9,"doc_module_name":10,"category_name":41,"show_sort_weight":42,"slug":43},18,"Letters",30,"letters",{"id":45,"doc_module":9,"doc_module_name":10,"category_name":46,"show_sort_weight":47,"slug":48},21,"Paper Templates",5,"papers-templates",{"id":50,"doc_module":9,"doc_module_name":10,"category_name":51,"show_sort_weight":4,"slug":52},158,"General","general-158",{"code":4,"msg":54,"data":55},"ok",{"site_id":56,"language":57,"slug":58,"title":59,"keywords":60,"description":61,"schema_data":62,"social_meta":120,"head_meta":122,"extra_data":124,"updated_unix":126},105,"en","the-giant-lachlan-orocline-a-powerful-new-predictive-tool-for-mineral-exploration-under-cover-across-eastern-australia","THE GIANT LACHLAN OROCLINE - A POWERFUL NEW PREDICTIVE TOOL FOR MINERAL EXPLORATION UNDER COVER ACROSS EASTERN AUSTRALIA","","The Lachlan Fold Belt in Eastern Australia has long been interpreted as a composite orogen shaped by multiple Early Paleozoic accretion and rifting events, but this framework poorly matches Ordovician palaeogeographic constraints and ignores the variable mix of accretionary and intra-plate characteristics. Integrating modern structural/stratigraphic mapping with aeromagnetic, gravity, deep seismic reflection, and geochronology constrains a unifying geodynamic model and explains mineral-system disruptions and apparent coeval dip-opposing systems. The result provides a down-scalable structural template that improves prediction of buried mineral systems beneath younger cover from Queensland to Tasmania.",{"@graph":63,"@context":119},[64,80,102],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":11,"@type":70,"position":76},"https://docshare.wps.com/template/presentations/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/the-giant-lachlan-orocline-a-powerful-new-predictive-tool-for-mineral-exploration-under-cover-across-eastern-australia/177947/",4,{"url":78,"name":59,"@type":81,"image":82,"author":87,"headline":59,"publisher":90,"fileFormat":93,"inLanguage":57,"description":61,"dateModified":94,"datePublished":95,"encodingFormat":93,"isAccessibleForFree":96,"interactionStatistic":97},"DigitalDocument",{"url":83,"@type":84,"width":85,"height":86},"https://docshare.wps.com/thumbnails/the-giant-lachlan-orocline-a-powerful-new-predictive-tool-for-mineral-exploration-under-cover-across-eastern-australia/177947.png","ImageObject",442,249,{"name":88,"@type":89},"Jordan Avery","Person",{"url":68,"name":91,"@type":92},"DocShare","Organization","application/vnd.openxmlformats-officedocument.wordprocessingml.document","2026-10-19","2026-09-02",true,{"@type":98,"interactionType":99,"userInteractionCount":101},"InteractionCounter",{"@type":100},"ViewAction",10,{"@type":103,"mainEntity":104},"FAQPage",[105,111,115],{"name":106,"@type":107,"acceptedAnswer":108},"Why do conventional interpretations struggle to explain key Ordovician palaeogeographic constraints in Eastern Australia?","Question",{"text":109,"@type":110},"They fit poorly with important palaeogeographic constraints and often overlook the highly variable combination of accretionary and intra-plate characteristics, including microcontinents embedded within the orogen.","Answer",{"name":112,"@type":107,"acceptedAnswer":113},"What data types are integrated to constrain the new geodynamic model for the Lachlan Fold Belt?",{"text":114,"@type":110},"The model combines modern structural and stratigraphic mapping with aeromagnetic data, gravity data, deep seismic reflection data, and geochronology.",{"name":116,"@type":107,"acceptedAnswer":117},"How does the Lachlan Orocline change mineral prospectivity predictions under younger cover?",{"text":118,"@type":110},"By doubling the apparent width of the fold belt and reorienting geology at continent scale, it disrupts and redistributes pre-existing mineral systems and enables predictions of buried mineral systems beneath younger cover for targeted exploration.","https://schema.org",{"og:url":78,"og:type":121,"og:title":59,"og:site_name":91,"og:description":61},"article",{"robots":123,"canonical":78},"index,follow",{"doc_id":125,"site_id":56},177947,1791745155,{"code":4,"msg":5,"data":128},{"doc_id":125,"user_id":129,"nickname":88,"user_avatar":130,"doc_module":9,"category_id":8,"category_name":11,"doc_title":59,"doc_description":61,"doc_content":131,"file_id":132,"file_url":133,"file_type":134,"file_size":135,"view_count":101,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":101,"language":136,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":137,"faqs":138,"seo_title":139,"seo_description":61,"update_tm":140,"read_time":79},1099523882367,"https://ap-avatar.wpscdn.com/davatar_9964176cb1d06d4a9deccf72a44ae3dc","THE GIANT LACHLAN OROCLINE - A POWERFUL NEW PREDICTIVE TOOL FOR MINERAL EXPLORATION UNDER COVER ACROSS EASTERN AUSTRALIA\nRoss Cayley\nGeological Survey of Victoria.\nAbstract\nSince the first applications of modern plate tectonic theory were applied to Eastern Australia, the Lachlan Fold Belt (LFB) has been repeatedly interpreted within the paradigm of an unusually wide and squat, composite orogen, an amalgamation of multiple linear, orogen-parallel Early Paleozoic accretion or rifting events and multiple arc complexes, some developed independently, some simultaneously.  Such models are a poor fit to key Ordovician palaeogeographic constraints, and don’t take a highly variable mix of accretionary and intra-plate characteristics, or microcontinents embedded within the orogen, into account. The integration of modern structural and stratigraphic mapping with aeromagnetic, gravity and deep seismic reflection data and geochronology now constrains a new geodynamic model: a simple unifying solution for the whole LFB from far north Queensland to Tasmania. This model develops the idea that only one, continent-dipping, subduction zone was active in eastern Australia in the Ordovician-Early Devonian. A narrow, linear arc – the Macquarie Arc – was constructed above this zone during   a period of trench-stability that spanned the Ordovician. The Macquarie Arc and associated rocks became accreted to eastern Australia as the Lachlan Orogen during transient end-Ordovician   trench-advance (the Benambran Orogeny) which was precipitated by the sinistral-oblique collision of the microcontinent Vandieland (Tasmania and the Selwyn Block) into the southern end of the subduction zone. This collision precipitated a tectonic mode-switch to asymmetric trench-retreat, which persisted throughout the Silurian. The Lachlan Orogen experienced widespread rifting, oceanward arc-migration, and mega-folding about vertical axes, all within a dextral trans-tensional upper-plate setting that chased the Paleopacific slab retreating oceanward in asymmetric southeast-directed roll-back. Mega-folding reoriented the Lachlan Orogen into a giant Z-shaped orocline that wrapped around the northern and eastern margins of the microcontinental collider. The Lachlan Orocline core is 400-1200 km in amplitude with well-defined limbs enclosing a fault-disrupted and extended core. Its formation involved continent-scale reorientations of the geology and effectively doubled apparent LFB width, disrupting and redistributing any- and all- mineral systems formed within the orogen prior to 400Ma in the process. Today, the Lachlan Orocline gives the appearance of ‘multiple’ coeval accretionary systems of opposing dip when simple cross-sections are constructed across it. This is simply a function of the large-scale of refolding.\nThe new model explains: patterns in aeromagnetic data; long-standing paleomagnetic data complexity; palaeogeography; provenance and stratigraphic relationships; apparent structural vergence ‘reversals’; the transition to Silurian crustal extension and rejuvenated marine sedimentation, onset of high-T back-arc metamorphism, and the wave of Silurian/Early Devonian arc- and back-arc magmatism that swept the LFB. The model delivers insight into the dynamics of the transfer of continental colliders from the lower to upper plate of a persistent subduction system and provides a new geodynamic model for the Cambrian-Devonian evolution of Tasmania in the process.    It’s a brand new conceptual template for predicting the location of buried mineral systems in all of Australia’s eastern States, with a 3-fold+ increase in the area of potentially prospective rocks that are directly comparable to those already known, from beneath the vast plains of southern Queensland to the highlands of Tasmania. New locations predicted beneath younger cover are now available for targeted regional mineral exploration – a stimulant for the search for the next generation of mineral deposits in Aust","cbCaiqQgnoe2GTDd","https://ap.wps.com/l/cbCaiqQgnoe2GTDd","docx",1738065,"English","# Abstract\n## Geodynamic model and tectonic development\n## Implications for buried mineral systems\n# Introduction\n## Limits of outcrop-based discovery\n## Role of younger cover in cryptic deposits\n## Motivation from advances in geoscience","[{\"question\":\"Why do conventional interpretations struggle to explain key Ordovician palaeogeographic constraints in Eastern Australia?\",\"answer\":\"They fit poorly with important palaeogeographic constraints and often overlook the highly variable combination of accretionary and intra-plate characteristics, including microcontinents embedded within the orogen.\"},{\"question\":\"What data types are integrated to constrain the new geodynamic model for the Lachlan Fold Belt?\",\"answer\":\"The model combines modern structural and stratigraphic mapping with aeromagnetic data, gravity data, deep seismic reflection data, and geochronology.\"},{\"question\":\"How does the Lachlan Orocline change mineral prospectivity predictions under younger cover?\",\"answer\":\"By doubling the apparent width of the fold belt and reorienting geology at continent scale, it disrupts and redistributes pre-existing mineral systems and enables predictions of buried mineral systems beneath younger cover for targeted exploration.\"}]","THE GIANT LACHLAN OROCLINE - A POWERFUL NEW PREDICTIVE TOOL FOR MINERAL EXPLORATION UNDER COVER ACROSS EASTERN AUSTRALIA | DOCX",1788329812]