Economic Geology

Journal: Economic Geology

Publisher

Society of Economic Geologists

ISSN

1554-0774
0361-0128

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Publications 1 - 10 of 45

Lithology and hydrothermal alteration control the distribution of copper grade in the Prominent Hill iron oxide-copper-gold deposit (Gawler Craton, South Australia)
Schlegel, Tobias U.; Heinrich, Christoph A. (2015)
Economic Geology
The Porphyry Cu-(Mo-Au) Deposit at Altar (Argentina)
Zwahlen, Carmen; Cioldi, Stefania; Wagner, Thomas; et al. (2014)
Economic Geology
Zircon petrochronology of the Meghri-Ordubad pluton, Lesser caucasus: Fingerprinting igneous processes and implications for the exploration of porphyry Cu-Mo deposits
Rezeau, Hervé; Moritz, Robert; Wotzlaw, Jörn-Frederik; et al. (2019)
Economic Geology
Post-Orogenic Extension and Hydrothermal Ore Formation
Kaiser Rohrmeier, Majka; von Quadt, Albrecht; Driesner, Thomas; et al. (2013)
Economic Geology
High-Resolution Geochronology of the Coroccohuayco Porphyry-Skarn Deposit, Peru: A Rapid Product of the Incaic Orogeny
Chelle-Michou, Cyril; Chiaradia, Massimo; Selby, David; et al. (2015)
Economic Geology
Causes for Large Scale Metal Zonation around Mineralized Plutons
Audétat, Andreas; Günther, Detlef; Heinrich, Christoph A. (2000)
Economic Geology
Fluid Evolution and Uranium (-Mo-F) Mineralization at the Maureen Deposit (Queensland, Australia)
Hurtig, Nicole C.; Heinrich, Christoph A.; Driesner, Thomas; et al. (2014)
Economic Geology
Magma evolution leading to porphyry Au-Cu mineralization at the Ok Tedi deposit, Papua New Guinea
Large, Simon J.E.; von Quadt, Albrecht; Wotzlaw, Jörn-Frederik; et al. (2018)
Economic Geology
Melt and Fluid Inclusions in Hydrothermal Veins
Stefanova, Elitsa; Driesner, Thomas; Zajacz, Zoltán; et al. (2014)
Economic Geology
The Age and Origin of the Ruwai Polymetallic Skarn Deposit, Indonesia: Evidence of Cretaceous Mineralization in the Central Borneo Metallogenic Belt
Dana, Cendi D.P.; Agangi, Andrea; Idrus, Arifudin; et al. (2023)
Economic Geology
The Ruwai skarn deposit is the largest polymetallic skarn deposit in Borneo and is located in the Schwaner Mountains. The skarns and massive orebodies are hosted in marble of the Jurassic Ketapang Complex, which was intruded by Cretaceous Sukadana granitoids. The prograde-stage garnet and retrograde-stage titanite yielded U-Pb ages of 97.0 ± 1.8 to 94.2 ± 10.3 Ma and 96.0 ± 2.9 to 95.0 ± 2.0 Ma, respectively. These ages are similar to Re-Os ages obtained on sulfides (96.0 ± 2.3 Ma) and magnetite (99.3 ± 3.6 Ma). The U-Pb zircon ages reveal that magmatism at Ruwai occurred in three phases, including the Early Cretaceous (ca. 145.7 and 106.7–105.7 Ma; andesite-dacite), Late Cretaceous (ca. 99.7–97.1 Ma; diorite-granodiorite), and late Miocene (ca. 10.94–9.51 Ma; diorite-dolerite). Based on geochemical and stable isotopic data (C-O-S) the Ruwai skarn ores are interpreted to have formed from oxidized fluids at ca. 160 to 670°C. The ore-forming fluids and metals were mostly magmatic in origin but with significant crustal input. Ruwai skarn mineralization occurred in the Late Cretaceous, associated with Paleo-Pacific subduction beneath Sundaland after the Southwest Borneo accretion. Ruwai is the first occurrence of Cretaceous mineralization recognized in the Central Borneo metallogenic belt.

Publications 1 - 10 of 45

Journal: Economic Geology

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