The petrochronological records of eclogites in the Scandinavian Caledonides are investigated using EPMA and LA-ICPMS of zircon and apatite for U–Pb geochronology, combined with major and trace element characteristics. Metamorphic zircon from two eclogites from the Lofoten-Vesterålen Complex (Lofoten Archipelago region) collectively yielded a Concordia age 427.8 ± 5.7 Ma and an upper intercept U–Pb age 425 ± 30 Ma. Apatites from the same eclogites provided U–Pb lower intercepts at 322 ± 28 Ma and 354 ± 33 Ma, with the latter also yielding a younger age of 227 ± 24 Ma. Two eclogites from the Lower Seve Nappe (Northern Jämtland) demonstrate different zircon and apatite age records. Metamorphic zircon provided Concordia ages of 467.2 ± 5.9 Ma and 444.5 ± 5.5 Ma, which resolve the age of prograde metamorphism and zircon growth during retrogression, respectively. The lower intercept U–Pb ages of apatites from the same eclogites are 436 ± 18 and 415 ± 25 Ma, respectively. In combination with their geochemical characteristics, they suggest two separate stages of exhumation of eclogite bodies in the Lower Seve Nappe. Zircons from an eclogite from the Blåhø Nappe (Nordøyane Archipelago) yielded a continuum of concordant U–Pb dates from ca. 435 to 395 Ma, which suggests several cycles of HT metamorphism within short intervals. Distinctive trace element characteristics of apatites from the Blåhø Nappe eclogite suggest formation coeval with zircon and garnet during HT metamorphism, but Pb diffusion behaved as an open system until cooling during exhumation of the nappe at 390 ± 12 Ma (lower intercept U–Pb age of apatite). To summarize, this study presents the high potential of coupled zircon and apatite petrochronology of eclogites in resolving their metamorphic evolution, particularly with respect to using trace element characteristics of apatites to constrain the records of their growth, alterations and the meaning of their U–Pb age record.

利用锆石和磷灰石的 EPMA 和 LA-ICPMS 进行 U-Pb 地质年代学研究，并结合主量和微量元素特征，研究了斯堪的纳维亚喀里多尼亚地区榴辉岩的岩石年代学记录。来自 Lofoten-Vesterålen 杂岩（罗弗敦群岛地区）的两块榴辉岩的变质锆石共同得出 Concordia 年龄 427.8 ± 5.7 Ma 和上部截距 U-Pb 年龄 425 ± 30 Ma。来自相同榴辉岩的磷灰石在 322 ± 28 Ma 和 354 ± 33 Ma 处提供了较低的 U-Pb 截距，后者也产生了 227 ± 24 Ma 的更年轻年龄。产自塞夫纳佩下游（耶姆特兰北部）的两颗榴辉岩显示出不同的锆石和磷灰石年龄记录。变质锆石提供的 Concordia 年龄为 467.2 ± 5.9 Ma 和 444.5 ± 5.5 Ma，解决了前变质作用和退变过程中锆石生长的年龄，分别。来自同一榴辉岩的磷灰石的较低截距 U-Pb 年龄分别为 436 ± 18 和 415 ± 25 Ma。结合其地球化学特征，他们提出了下塞夫推覆体中榴辉岩体折返的两个独立阶段。来自 Blåhø Nappe（Nordøyane 群岛）榴辉岩的锆石产生了大约 100 年左右的一致 U-Pb 年代的连续体。435 至 395 Ma，这表明在短时间内发生了几个高温变质作用周期。Blåhø Nappe 榴辉岩中磷灰石的独特微量元素特征表明，在 HT 变质作用过程中，磷灰石与锆石和石榴石同时形成，但 Pb 扩散表现为开放系统，直到 390 ± 12 Ma 推覆体折返期间冷却（截距 U-Pb 年龄为磷灰石）。总而言之，