Breccia characteristics and classification of the GW orebodies, Balatoc Diatreme, Philippines: Insights to breccia facies and distribution across diatremes,Resource Geology

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Breccia characteristics and classification of the GW orebodies, Balatoc Diatreme, Philippines: Insights to breccia facies and distribution across diatremes
Resource Geology ( IF 1.1 ) Pub Date : 2022-01-17 , DOI: 10.1111/rge.12282
Acer Jian T. Figueroa _{1,

2} , Jillian Aira S. Gabo‐Ratio ₁

Affiliation

A careful descriptive characterization of breccias, including diatremes, is useful for comparative purposes during exploration, rather than the colloquial use of various breccia terminology in ore exploration. Here, we present the first detailed breccia characterization of the Balatoc Diatreme-hosted GW orebodies in the Acupan deposit, Philippines. Three breccia types are identified from descriptive classification of the GW orebodies. GW 3/13, located at the northwestern rim of the diatreme, is a medium- to coarse-grained rotational, quartz-cemented diorite breccia, whereas GW 11, at the eastern portion of the diatreme, is a medium- to coarse-grained mosaic calcite-cemented andesite breccia. Both GW orebodies located at the southwestern portion of the diatreme, GW 4/7 and GW 6, are medium- to coarse-grained rotational quartz-cemented polymict breccias. The breccia facies and distribution emplaced during a single event include: (a) Crackle breccias proximal to the unbrecciated host rocks. (b) Mosaic breccia facies along the contact between the surrounding host rocks and orebody. (c) Rotational breccia facies near the outline of the diatreme. At Balatoc, the mineralized GW orebodies are characterized by mosaic and rotational clast distributions, suggesting that these breccia types are priority targets in ore exploration. Recognizing these various breccia types in other deposits may serve as an exploration vector to determine their position in a diatreme-hosted deposit.

中文翻译：

GW 矿体的角砾岩特征和分类，巴拉托克迪亚特雷梅，菲律宾：对角砾岩相和跨直径分布的洞察

对角砾岩的仔细描述性描述，包括 diatremes，对于勘探期间的比较目的是有用的，而不是在矿石勘探中通俗地使用各种角砾岩术语。在这里，我们首次展示了菲律宾 Acupan 矿床中以 Balatoc Diatreme 为主体的 GW 矿体的详细角砾岩特征。从 GW 矿体的描述性分类中确定了三种角砾岩类型。GW 3/13 位于通孔西北缘，为中至粗粒旋转石英胶结闪长岩角砾岩，而 GW 11 位于通孔东部，为中至粗粒马赛克方解石胶结的安山岩角砾岩。GW 4/7 和 GW 6 这两个 GW 矿体位于直径的西南部分，是中到粗粒的旋转石英胶结多聚体角砾岩。单个事件期间的角砾岩相和分布包括：（a）靠近未角砾化的主岩的裂纹角砾岩。(b) 沿围岩与矿体接触面的镶嵌角砾岩相。(c) 直径线轮廓附近的旋转角砾岩相。在巴拉托克，矿化的 GW 矿体以镶嵌和旋转碎屑分布为特征，这表明这些角砾岩类型是矿石勘探的优先目标。识别其他矿床中的这些不同类型的角砾岩可以作为勘探载体来确定它们在硅藻土矿床中的位置。(b) 沿围岩与矿体接触面的镶嵌角砾岩相。(c) 直径线轮廓附近的旋转角砾岩相。在巴拉托克，矿化的 GW 矿体以镶嵌和旋转碎屑分布为特征，这表明这些角砾岩类型是矿石勘探的优先目标。识别其他矿床中的这些不同类型的角砾岩可以作为勘探载体来确定它们在硅藻土矿床中的位置。(b) 沿围岩与矿体接触面的镶嵌角砾岩相。(c) 直径线轮廓附近的旋转角砾岩相。在巴拉托克，矿化的 GW 矿体以镶嵌和旋转碎屑分布为特征，这表明这些角砾岩类型是矿石勘探的优先目标。识别其他矿床中的这些不同类型的角砾岩可以作为勘探载体来确定它们在硅藻土矿床中的位置。

更新日期：2022-01-17

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