Petrogenesis of ore-hosting magmatic rocks from the Jiudian gold deposit in Jiaodong area, and its geological implications

JingWei, LI; Qiu, Kaibin; Ma, Ming; WenLong, LIU; Huang, Ya‐Qi; YuJi, WEI; XianFa, XUE

doi:10.18654/1000-0569/2023.02.07

Cited by 2 publications

(3 citation statements)

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“…The Sulu orogenic belt formed as a result of the Triassic collision between the NCC and YC, and the belt consists of mainly Neoproterozoic granitic gneisses with minor coesitebearing eclogite, quartzite, and schist (Yang et al, 2016b). Neoarchean-Paleoproterozoic tonalite-trondhjemitegranodiorite (TTG) gneiss, which mainly formed at ~2.9 Ga, ~2.7 Ga, or ~2.5 Ga, is widely developed (Tang et al, 2007;Jahn et al, 2008;Wu et al, 2014;Xie et al, 2015;Wan et al, 2017).…”

Section: Regional Geologymentioning

confidence: 99%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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Gold deposits in Jiaodong, termed Jiaodong‐type, are tectonically located in the southeastern margin of the North China Craton. Their major features are reviewed in this paper to highlight the differences between Jiaodong deposits and other genetic types of gold deposits. The mineralization was synchronized with asthenosphere upwelling indicated by syn‐ore OIB‐like mafic dike and large‐scale crustal thinning suggested by decrease of Sr/Y from pre‐ore to syn‐ore granites. Asthenosphere upwelling induced by the roll‐back of Paleo‐Pacific Plate drove partial melting of lithospheric mantle and devolatilization, which induced the release of the ore‐forming fluids. In concomitant with magmatic records, mineralization migrated from the western Jiaobei terrane (133–127 Ma) to the eastern Sulu orogenic belt (114–108 Ma), corresponding to the eastward roll‐back of Paleo‐Pacific Plate. Gold mineralization in Jiaodong formed in the transitions of ductile to brittle deformation, rapid to slow crustal uplift, and regional compression to extension. In the regional‐scale, the gold deposits in the Jiaobei terrane are mostly situated at intersections between NE‐trending faults and EW‐trending basement faults, and gold orebodies dominantly controlled by the lithologic contacts between Precambrian metamorphic rocks and Mesozoic granites. The mineralization was dominated by the disseminated‐veinlet ores related to quartz–sericite alteration in strong cataclasite‐breccia zone, with subsidiary thick quartz‐sulfide veins developed in secondary fault zones. The ore‐forming fluids belong to a H2O–CO2–NaCl±CH4 system and show minor variations in salinity among different types of ore. Structure‐fluid feedback involving fluid‐rock reaction and hydrofracturing triggered the fluid phase separation and resultant gold deposition. The Jiaodong gold deposits are distinct from orogenic and intrusion‐related gold deposits in terms of tectonic setting, origin of ore‐forming fluids, and mechanism of gold deposition.

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Section: Regional Geologymentioning

confidence: 99%

The Formation of the Jiaodong Gold Province

Deng

WANG

LIU

et al. 2022

Acta Geologica Sinica (Eng)

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“…The Neoarchean continental crustal growth event represented by the ca. 2.64 Ga amphibolite in the southern Langshan area has also been reported in the TNCO (Liu et al, 2009;Yang et al, 2011;Yang et al, 2013;Zhu et al, 2013;Lu et al, 2014), the Eastern Block (Jahn et al, 1988;Zhuang et al, 1997;Xie et al, 2014bXie et al, , 2015Wan et al, 2019) and the eastern part of the Western Block . Notably, the ca.…”

Section: Tectonic Implicationsmentioning

confidence: 64%

“…Recently, this ca. 2.7 Ga tectonothermal event has also been found in some basements of the NCC (Liu et al, 2009;Yang et al, 2011Yang et al, , 2013Zhu et al, 2013;Xie et al, 2014bXie et al, , 2015. Researchers have begun to view the early middle Archean to early Neoarchean as an important stage in continental crustal growth of the NCC.…”

Section: Tectonic Implicationsmentioning

confidence: 99%

Precambrian Tectonic Affinity of the Southern Langshan Area, Northeastern Margin of the Alxa Block: Evidence from Zircon U‐Pb Dating and Lu‐Hf Isotopes

Niu

Zhang

et al. 2022

Acta Geologica Sinica (Eng)

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The Alxa Block is the westernmost part of the North China Craton (NCC), and is regarded as one of the basement components of the NCC. Its geological evolution is of great significance for the understanding of the NCC. However, the Precambrian basement of the Alxa Block is still poorly studied. In this study, we present new in situ LA-ICP-MS zircon U-Pb and Lu-Hf isotope data from the Diebusige Metamorphic Complex (DMC) which located in the eastern Alxa Block. Field and petrological studies show that the DMC consists mainly of metamorphic supracrustal rocks and minor metamorphic plutonic rocks and has experienced amphibolite-granulite facies metamorphism. Zircon U-Pb dating results suggested that the amphibolite sample yields a crystallization age of 2636 ± 14 Ma and metamorphic ages of 2517 -2454 Ma and 1988 -1952 Ma, proving the existence of exposed Archean rocks in the Langshan area and indicating that late Neoarchean to Paleoproterozoic metamorphic events existed in the Alxa Block. Two paragneiss samples show that the magmatic detrital zircons from the DMC yield 207 Pb/ 206 Pb ages ranging from 2.48 Ga to 2.10 Ga with two youngest peaks at 2.13 Ga and 2.16 Ga, respectively, and they were also overprinted by metamorphic events at 1.97-1.90 Ga and 1.89-1.79 Ga. Compilation of U-Pb ages of magmatic detrital and metamorphic zircons suggested that the main part of the DMC may have been formed at 2.1-2.0 Ga. Zircon Lu-Hf isotope data show that the source materials of the main part of the DMC were originated from the reworking of ancient Archean crust (3.45-2.78 Ga). The Hf isotope characteristics and the tectonothermal event records exhibit different evolution history with the Khondalite Belt and the Yinshan Block and the other basements of the Alxa Block, indicating that the Langshan was likely an independent terrain before the middle Paleoproterozoic and was subjected to the middle to late Paleoproterozoic tectonothermal events with the Khondalite Belt as a whole.

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Petrogenesis of ore-hosting magmatic rocks from the Jiudian gold deposit in Jiaodong area, and its geological implications

Cited by 2 publications

References 0 publications

The Formation of the Jiaodong Gold Province

The Formation of the Jiaodong Gold Province

Precambrian Tectonic Affinity of the Southern Langshan Area, Northeastern Margin of the Alxa Block: Evidence from Zircon U‐Pb Dating and Lu‐Hf Isotopes

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