The Mount Colin Cu-Au deposit is located in the Mary Kathleen Domain of the Mount Isa Inlier, NW Queensland. The deposit is hosted in the Corella Formation, which transitions into the Burstall Granite at a depth of ~400 m. The host rocks of the deposit are overprinted by Na-Ca alteration and a Ca-Mg-Fe skarn assemblage. Na-Ca alteration yields a titanite ²⁰⁷Pb/²⁰⁶Pb weighted mean age of 1717 ± 8 Ma (MSWD = 0.32) and is composed of albite, actinolite, zircon, titanite and scapolite with retrograde calcite, prehnite and sericite. The Ca-Mg-Fe skarn yields a titanite ²⁰⁷Pb/²⁰⁶Pb weighted mean age of 1712 ± 7 Ma (MSWD = 1.2) and is composed of hastingsite, K-feldspar, clinopyroxene, albite, titanite, calcite, biotite, and zircon with retrograde quartz and chlorite. Based on temporal relationships, Na-Ca alteration and the Ca-Mg-Fe skarn is interpreted to have formed from a hydrothermal magmatic fluid during late-stage magmatism of the (1740–1710 Ma) Wonga-Burstall plutons. A second generation of titanite (denoted titanite II) is present within Na-Ca alteration and the Ca-Mg-Fe skarn assemblage. Titanite II yields a ²⁰⁷Pb/²⁰⁶Pb weighted mean age of 1576 ± 7 Ma (MSWD = 0.37), and is interpreted to have formed from an external metamorphic hydrothermal fluid during widespread deformation associated with the (1610–1500 Ma) Isan Orogeny. The Mount Colin Cu-Au deposit consists of a predominantly coarse-grained, mineralogically zoned assemblage that infills along the NW-striking Mount Colin Fault. The centre of the deposit comprises a largely unmineralized core composed of calcite and/or quartz ± apatite ± microcline. Cu-Au mineralization is positioned along the outer margins of the deposit and consists of biotite, actinolite, chalcopyrite and pyrrhotite with trace abundances of magnetite, pyrite, galena, melonite and arsenopyrite. Apatite from the core of the deposit yields a U–Pb age of 1523 ± 16 Ma (MSWD = 1.2). The δ³⁴S_CDT values of chalcopyrite and pyrrhotite range from 0.1–2.1 ‰ and 0.9–1.5 ‰ respectively. The δ¹³C_VPDB values of calcite range from −5.54 ‰ to −4.54 ‰ with corresponding δ¹⁸O_VSMOW values ranging from 8.16–11.26 ‰. Based on the temporal and isotopic constraints presented in this study, a hydrothermal magmatic origin for Cu-Au mineralization is favoured. The timing of Cu-Au mineralization is coeval with a regional-scale metamorphic/hydrothermal event throughout the Mary Kathleen Domain and widespread magmatism throughout the Eastern Fold Belt of the Mount Isa Inlier.

科林山铜金矿床位于昆士兰西北部伊萨因利尔山的玛丽凯瑟琳地区。该矿床位于 Corella 地层中，该地层在约 400 m 的深度处转变为 Burstall 花岗岩。矿床的主岩被钠钙蚀变和钙镁铁矽卡岩组合所覆盖。Na-Ca 蚀变产生钛铁矿²⁰⁷ Pb/ ²⁰⁶ Pb 加权平均年龄为 1717 ± 8 Ma (MSWD = 0.32)，由钠长石、阳起石、锆石、钛铁矿和方沸石以及退行方解石、葡萄石和绢云母组成。Ca-Mg-Fe 矽卡岩产生钛矿²⁰⁷ Pb/ ²⁰⁶ Pb 加权平均年龄为 1712 ± 7 Ma (MSWD = 1.2)，由黑长石、钾长石、单斜辉石、钠长石、钛矿、方解石、黑云母和锆石组成含有逆行石英和绿泥石。根据时间关系，Na-Ca 蚀变和 Ca-Mg-Fe 矽卡岩被解释为由 Wonga-Burstall 岩体 (1740–1710 Ma) 晚期岩浆作用期间的热液岩浆流体形成。第二代钛矿（表示为钛矿 II）存在于 Na-Ca 蚀变和 Ca-Mg-Fe 矽卡岩组合中。钛矿 II 的²⁰⁷ Pb/ ²⁰⁶ Pb 加权平均年龄为 1576 ± 7 Ma (MSWD = 0.37)，并被解释为在与 (1610–1500 Ma) 伊桑造山运动相关的广泛变形过程中由外部变质热液流体形成。科林山铜金矿床主要由粗粒矿物学分区组合组成，该组合沿着西北走向的科林山断层填充。矿床中心主要由方解石和/或石英±磷灰石±微斜长石组成的未矿化核心组成。铜金矿化位于矿床的外缘，由黑云母、阳起石、黄铜矿和磁黄铁矿组成，并含有微量丰度的磁铁矿、黄铁矿、方铅矿、菱铁矿和毒砂。矿床核心的磷灰石 U-Pb 年龄为 1523 ± 16 Ma (MSWD = 1.2)。黄铜矿和磁黄铁矿的δ ³⁴ S _CDT值分别为 0.1–2.1 ‰ 和 0.9–1.5 ‰。方解石的δ ¹³ C _VPDB值范围为 -5.54 ‰ 至 -4.54 ‰，相应的 δ ¹⁸ O _VSMOW值范围为 8.16–11.26 ‰。根据本研究提出的时间和同位素限制，铜金矿化的热液岩浆成因是有利的。铜-金矿化的时间与整个玛丽凯瑟琳域的区域规模变质/热液事件以及整个伊萨内利尔东部褶皱带广泛的岩浆作用同时发生。