Sumail , Nicolas Thébaud , Quentin Masurel , Christopher M. Fisher , Hugh Smithies , Ravi Schreefel
{"title":"世界级 Jundee 矿床金矿化的时间限制:对新元古代伊尔加恩克拉通造山金矿化偶发性质的启示","authors":"Sumail , Nicolas Thébaud , Quentin Masurel , Christopher M. Fisher , Hugh Smithies , Ravi Schreefel","doi":"10.1016/j.precamres.2024.107479","DOIUrl":null,"url":null,"abstract":"<div><p>The proposed genetic model for orogenic gold deposits hosted in Archean cratons worldwide has long assumed a single, late-orogenic mineralisation event. Recent geochronological developments and their application to gold deposits, however, have challenged this conventional view and indicate that gold endowment in several world-class Archean systems developed over distinct mineralisation stages. Here, we present U-Pb geochronological data from igneous zircons extracted from pre-, syn-, and post-mineralisation intrusions from the world-class Jundee gold deposit in the Yilgarn Craton of Western Australia. The crystallisation age obtained for a syn-mineralisation lamprophyre indicates that gold mineralisation occurred at ca. 2670 Ma, which is ca. 30 Ma older than the previously proposed gold episode (ca. 2640 – 2630 Ma) for the region. When integrated with fast-emerging, high-quality geochronological data from other major gold deposits across the Yilgarn Craton, our results highlight the occurrence of an early, <em>syn-orogenic</em> mineralisation event between ca. 2675 – 2655 Ma, which pre-dated the ca. 2640 – 2630 Ma <em>late-orogenic</em> gold event identified across the Kalgoorlie Terrane. This older gold mineralisation event was concurrent with the onset of the Neoarchean Kalgoorlie Orogeny in the Yilgarn Craton, which also coincided with a peak in mantle-derived magmatism (e.g., lamprophyres and sanukitoids). The younger gold event was coeval with intra-crustal granite plutonism and peak metamorphic conditions that occurred during the late- to post-collisional evolution of the Yilgarn Craton at ca. 2640 – 2630 Ma. Comparison between the Yilgarn Craton in Western Australia and the Superior Craton in Canada demonstrates that both record multiple gold events that occurred during protracted orogenesis. This study underscores the importance of tectonic processes in shaping the episodic nature of gold mineralisation in these ancient cratons.</p></div>","PeriodicalId":49674,"journal":{"name":"Precambrian Research","volume":"410 ","pages":"Article 107479"},"PeriodicalIF":3.2000,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S030192682400192X/pdfft?md5=c1b20da027295f9a4f77db29761ec82f&pid=1-s2.0-S030192682400192X-main.pdf","citationCount":"0","resultStr":"{\"title\":\"Temporal constraints on gold mineralisation at the world-class Jundee deposit: Insights into the episodic nature of orogenic gold mineralisation in the Neoarchean Yilgarn Craton\",\"authors\":\"Sumail , Nicolas Thébaud , Quentin Masurel , Christopher M. Fisher , Hugh Smithies , Ravi Schreefel\",\"doi\":\"10.1016/j.precamres.2024.107479\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The proposed genetic model for orogenic gold deposits hosted in Archean cratons worldwide has long assumed a single, late-orogenic mineralisation event. Recent geochronological developments and their application to gold deposits, however, have challenged this conventional view and indicate that gold endowment in several world-class Archean systems developed over distinct mineralisation stages. Here, we present U-Pb geochronological data from igneous zircons extracted from pre-, syn-, and post-mineralisation intrusions from the world-class Jundee gold deposit in the Yilgarn Craton of Western Australia. The crystallisation age obtained for a syn-mineralisation lamprophyre indicates that gold mineralisation occurred at ca. 2670 Ma, which is ca. 30 Ma older than the previously proposed gold episode (ca. 2640 – 2630 Ma) for the region. When integrated with fast-emerging, high-quality geochronological data from other major gold deposits across the Yilgarn Craton, our results highlight the occurrence of an early, <em>syn-orogenic</em> mineralisation event between ca. 2675 – 2655 Ma, which pre-dated the ca. 2640 – 2630 Ma <em>late-orogenic</em> gold event identified across the Kalgoorlie Terrane. This older gold mineralisation event was concurrent with the onset of the Neoarchean Kalgoorlie Orogeny in the Yilgarn Craton, which also coincided with a peak in mantle-derived magmatism (e.g., lamprophyres and sanukitoids). The younger gold event was coeval with intra-crustal granite plutonism and peak metamorphic conditions that occurred during the late- to post-collisional evolution of the Yilgarn Craton at ca. 2640 – 2630 Ma. Comparison between the Yilgarn Craton in Western Australia and the Superior Craton in Canada demonstrates that both record multiple gold events that occurred during protracted orogenesis. This study underscores the importance of tectonic processes in shaping the episodic nature of gold mineralisation in these ancient cratons.</p></div>\",\"PeriodicalId\":49674,\"journal\":{\"name\":\"Precambrian Research\",\"volume\":\"410 \",\"pages\":\"Article 107479\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2024-07-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S030192682400192X/pdfft?md5=c1b20da027295f9a4f77db29761ec82f&pid=1-s2.0-S030192682400192X-main.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Precambrian Research\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S030192682400192X\",\"RegionNum\":2,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOSCIENCES, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Precambrian Research","FirstCategoryId":"89","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S030192682400192X","RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOSCIENCES, MULTIDISCIPLINARY","Score":null,"Total":0}
Temporal constraints on gold mineralisation at the world-class Jundee deposit: Insights into the episodic nature of orogenic gold mineralisation in the Neoarchean Yilgarn Craton
The proposed genetic model for orogenic gold deposits hosted in Archean cratons worldwide has long assumed a single, late-orogenic mineralisation event. Recent geochronological developments and their application to gold deposits, however, have challenged this conventional view and indicate that gold endowment in several world-class Archean systems developed over distinct mineralisation stages. Here, we present U-Pb geochronological data from igneous zircons extracted from pre-, syn-, and post-mineralisation intrusions from the world-class Jundee gold deposit in the Yilgarn Craton of Western Australia. The crystallisation age obtained for a syn-mineralisation lamprophyre indicates that gold mineralisation occurred at ca. 2670 Ma, which is ca. 30 Ma older than the previously proposed gold episode (ca. 2640 – 2630 Ma) for the region. When integrated with fast-emerging, high-quality geochronological data from other major gold deposits across the Yilgarn Craton, our results highlight the occurrence of an early, syn-orogenic mineralisation event between ca. 2675 – 2655 Ma, which pre-dated the ca. 2640 – 2630 Ma late-orogenic gold event identified across the Kalgoorlie Terrane. This older gold mineralisation event was concurrent with the onset of the Neoarchean Kalgoorlie Orogeny in the Yilgarn Craton, which also coincided with a peak in mantle-derived magmatism (e.g., lamprophyres and sanukitoids). The younger gold event was coeval with intra-crustal granite plutonism and peak metamorphic conditions that occurred during the late- to post-collisional evolution of the Yilgarn Craton at ca. 2640 – 2630 Ma. Comparison between the Yilgarn Craton in Western Australia and the Superior Craton in Canada demonstrates that both record multiple gold events that occurred during protracted orogenesis. This study underscores the importance of tectonic processes in shaping the episodic nature of gold mineralisation in these ancient cratons.
期刊介绍:
Precambrian Research publishes studies on all aspects of the early stages of the composition, structure and evolution of the Earth and its planetary neighbours. With a focus on process-oriented and comparative studies, it covers, but is not restricted to, subjects such as:
(1) Chemical, biological, biochemical and cosmochemical evolution; the origin of life; the evolution of the oceans and atmosphere; the early fossil record; palaeobiology;
(2) Geochronology and isotope and elemental geochemistry;
(3) Precambrian mineral deposits;
(4) Geophysical aspects of the early Earth and Precambrian terrains;
(5) Nature, formation and evolution of the Precambrian lithosphere and mantle including magmatic, depositional, metamorphic and tectonic processes.
In addition, the editors particularly welcome integrated process-oriented studies that involve a combination of the above fields and comparative studies that demonstrate the effect of Precambrian evolution on Phanerozoic earth system processes.
Regional and localised studies of Precambrian phenomena are considered appropriate only when the detail and quality allow illustration of a wider process, or when significant gaps in basic knowledge of a particular area can be filled.