Cerro Quema is a high-sulfidation epithermal Au-Cu deposit located in the Azuero Peninsula, southwestern Panama. It is hosted by a dacite dome complex of the Río Quema Formation, a volcano-sedimentary sequence of the Panamanian Cretaceous-Paleogene magmatic arc. Cerro Quema has oxide resources of 24.60 Mt at 0.71 g/t Au and 0.04% Cu, and sulfide resources of 11.38 Mt at 0.41 g/t Au and 0.31% Cu. Alunite ⁴⁰Ar/³⁹Ar dating of a sample from Cerro Quema yielded a final age of 48.8 ± 2.2 Ma (weighted average of plateau age) and 49.2 ± 3.3 Ma (weighted average of total gas age). This age is interpreted to represent the formational age of the Cerro Quema deposit at ~49 Ma, linking it to the Valle Rico batholith intrusive event. Based on the new alunite ⁴⁰Ar/³⁹Ar data and a reexamination of published geochronological data, magmatic-hydrothermal deposits such as the Río Pito porphyry copper and the Cerro Quema high-sulfidation epithermal deposit formed during the early arc stage (68–40 Ma) in the Chagres-Bayano arc (eastern Panama) and the Soná-Azuero arc (western Panama), respectively. They formed in a similar geodynamic setting at ~49 Ma, when diorites and quartz-diorites intruded Cretaceous volcano-sedimentary sequences. Cerro Quema and Río Pito provide evidence for the exploration potential of Cretaceous-Paleogene arc segments. Exploration should focus on Cretaceous volcanic and volcano-sedimentary sequences intruded by Paleogene batholiths of intermediate to felsic composition.

中文翻译：

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巴拿马阿塞罗半岛塞鲁·奎马金铜矿的新40 Ar / 39 Ar约会日期

Cerro Quema是位于巴拿马西南部的Azuero半岛的高硫化超热金铜矿床。它由RíoQuema岩层的菊苣穹顶复合体主持，Rano Quema岩体是巴拿马白垩纪-古近纪岩浆弧的火山沉积序列。Cerro Quema具有0.71 g / t Au和0.04％Cu的氧化物资源为24.60 Mt，以及0.41 g / t Au和0.31％Cu的硫化物资源为11.38Mt。来自Cerro Quema的样品的Alunite ⁴⁰ Ar / ³⁹ Ar测年最终年龄为48.8±2.2 Ma（高原年龄的加权平均值）和49.2±3.3 Ma（总气体年龄的加权平均值）。该年龄被解释为代表Cerro Quema矿床的形成年龄（约49 Ma），并将其与Valle Rico岩基岩侵入事件联系起来。基于新的alunite ⁴⁰ Ar /³⁹ Ar数据和已发表的地质年代数据的重新检验，是在Chagres-Bayano弧（68-40 Ma）的早期电弧阶段（68-40 Ma）形成的岩浆热液矿床，如RíoPito斑岩铜矿和Cerro Quema高硫化超热矿床。巴拿马东部）和Soná-Azuero弧线（巴拿马西部）。它们在大约49 Ma的相似地球动力学环境中形成，那时闪长岩和石英闪长岩侵入白垩纪火山沉积序列。塞罗·奎马（Cerro Quema）和里奥·皮托（RíoPito）为白垩纪-古宙弧段的勘探潜力提供了证据。勘探应集中于白垩纪火山岩和火山沉积岩层序，这些岩屑层由中等至长英质成分的古近纪岩床侵入。