Jamie J. Wilkinson

Formation of giant high-grade hypogene porphyry copper deposits during phyllic to advanced argillic alteration: textural evidence from automated SEM mapping, Resolution and Hugo Dummett North deposits

Chao Yang, Jamie J. Wilkinson

Porphyry Cu deposits host the majority of global Cu resources and high-grade hypogene porphyry Cu deposits are of particular interest to industry because of the reduced waste and energy consumption required in exploitation, leading to favorable economics and reduced environmental impact. Detailed …

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Formation of giant high-grade hypogene porphyry copper deposits during phyllic to advanced argillic alteration: textural evidence from automated SEM mapping at the Resolution and Hugo Dummett North deposits

Chao Yang, Jamie J. Wilkinson

gb, cn (code pays fourni par la source)

Petrogenesis of Early Cretaceous Duorenlieqian igneous rocks (113 ∼ 117 Ma) in the western Bangong-Nujiang metallogenic belt, Tibet, China: Implications for tectono-magmatic evolution and porphyry Cu-Au mineralization

Hao Sun, Yang Song, Jamie J. Wilkinson, Zhibo Liu et autres

• Duorenlieqian 113–117 Ma igneous rocks formed in subduction roll-back setting. • The Bangong −Nujiang Ocean underwent east–west diachronous closure in Cretaceous. • The diorite porphyry and quartz diorite are precursors for porphyry mineralization. Porphyry copper deposits are classic products of arc …

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Role of slab bending in the epithermal gold mineralization of South Kyushu, Japan

Mizuki Ishida, Ryuichi Shinjo, Masataka Aizawa, Hikaru Iwamori et autres

Porphyry copper formation driven by water-fluxed crustal melting during flat-slab subduction

Thomas N. Lamont, Matthew A. Loader, Nick M.W. Roberts, F. J. Cooper et autres

Abstract The prevailing view of the formation of porphyry copper deposits along convergent plate boundaries involves deep crustal differentiation of metal-bearing juvenile magmas derived from the mantle wedge above a subduction zone. However, many major porphyry districts formed during periods of flat-slab …

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A zircon case for super-wet arc magmas

Chetan L. Nathwani, Jon Blundy, Simon Large, Jamie J. Wilkinson et autres

Abstract Arc magmas have higher water contents (2-6 wt.% H 2 O) than magmas generated in other tectonic environments, with a growing body of evidence suggesting that some deep arc magmas may be ‘super-wet’ (>6 wt.% H 2 O). Here, we use …

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TRACKING FLUID TEMPERATURE AND δ18O IN CARBONATE-HOSTED HYDROTHERMAL ORE SYSTEMS USING CLUMPED C-O ISOTOPES

Steven Philip Hollis, Paul F. Dennis, Julian F. Menuge, Aileen Doran et autres

Abstract Carbonates are ubiquitous gangue phases in many hydrothermal ore deposits, often forming throughout the lifetime of individual systems. Clumped C-O isotope analysis represents a novel technique for the acquisition of accurate carbonate precipitation temperatures, allowing calculation of fluid δ18O values. This …

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Tectonic and Crustal Processes Drive Multi-Million Year Arc Magma Evolution Leading up to Porphyry Copper Deposit Formation in Central Chile

Simon Large, Chetan L. Nathwani, Jamie J. Wilkinson, T. Knott et autres

Abstract Subduction zone magmatism is a major control of volcanism, the generation of modern continental crust and the formation of economically important porphyry Cu–(Mo–Au) deposits. Reading the magmatic record of individual arc segments and constraining the rates of magmatic changes are critical …

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The role of crustal anatexis in porphyry copper ore formation during flat-slab subduction: Insights from the Laramide Belt, SW USA

Thomas N. Lamont, Matthew A. Loader, Nick M.W. Roberts, F. J. Cooper et autres

The prevailing paradigm for the formation of porphyry copper deposits along convergent plate boundaries involves deep-crustal differentiation of metal-bearing juvenile magmas derived from the mantle-wedge above a subduction zone. However, many major porphyry districts formed during periods of flat-slab subduction when the …

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Tracing metals from source to sink in Irish-type Zn-Pb(-Ba-Ag) deposits

Jamie J. Wilkinson

The Irish Midlands Zn-Pb(-Ba-Ag) Orefield represents one of the best studied palaeo-hydrothermal systems worldwide. Despite this, the detailed origins of ore and trace metals and the controls of their variability in deposits across the Orefield, have not been considered in detail. In …

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The Strontian Intrusive Complex: Petrography, Thermobarometry and the Influence of Titanite on Residual Melt Chemistry

Thomas James Matthews, Matthew A. Loader, Jamie J. Wilkinson, Yannick Buret et autres

Abstract Although the evolution of residual melts in magmatic systems controls their eruptability and ore-forming potential, their compositions are obscured in plutonic rocks by a protracted near-solidus evolution and the absence of interstitial glass. Here, we trace the evolution of residual melt …

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Apatite evidence for a fluid-saturated, crystal-rich magma reservoir forming the Quellaveco porphyry copper deposit (Southern Peru)

Chetan L. Nathwani, Simon Large, Emily Brugge, Jamie J. Wilkinson et autres

Abstract Large volume, intermediate-felsic magma reservoirs are the source of melt and mineralising fluids which generate porphyry copper deposits. Cooling and crystallisation of hydrous magmas drives the exsolution and expulsion of a magmatic volatile phase—a process which remains challenging to constrain in …

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