Abstract Metamorphic P–T paths provide valuable constraints on the tectonics of collisional orogens and many such paths have been deduced from analysis of chemical zoning in garnet. Inclusion barometry (e.g. quartz-in-garnet or QuiG) provides complementary and sometimes contradictory information regarding the interpretation of garnet zoning and the P–T paths derived therefrom. For example, QuiG barometry on several generations of garnet from well-characterized samples from Fall Mountain, New Hampshire, is consistent with the P–T path inferred from other methods. However, QuiG barometry is inconsistent with P–T paths inferred from garnet zoning from the Orfordville Belt (Vermont), Townshend Dam (Vermont), the Connecticut Valley Trough (Vermont), and Sifnos (Greece). New data from the Perry Mountain Formation, southeastern New Hampshire, suggests that QuiG may preserve a record of polymetamorphic events. Specifically, QuiG barometry in coticule samples is interpreted to record a previously unrecognized early medium pressure (ca. 0.9 GPa) metamorphism and a later low pressure (ca. 0.3 GPa) metamorphism.

中文翻译：

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根据石榴石 (QuiG) 气压计中的石英包裹体重新评估分区石榴石的“平衡”PT 路径

摘要 变质 P-T 路径为碰撞造山带的构造提供了有价值的约束，许多此类路径已从石榴石中的化学分带分析中推导出来。包裹体气压测量法（例如石英石榴石或 QuiG）提供了关于石榴石分带的解释和由此得出的 P-T 路径的互补信息，有时甚至是相互矛盾的信息。例如，来自新罕布什尔州福尔山的几代石榴石的 QuiG 气压测量与从其他方法推断的 P-T 路径一致。然而，QuiG 气压测量与从奥福德维尔带（佛蒙特州）、汤森德大坝（佛蒙特州）、康涅狄格河谷海槽（佛蒙特州）和 Sifnos（希腊）的石榴石分区推断出的 P-T 路径不一致。来自新罕布什尔州东南部佩里山地层的新数据，表明 QuiG 可能保留多变态事件的记录。具体来说，耳蜗样本中的 QuiG 气压测量被解释为记录以前无法识别的早期中压 (ca. 0.9 GPa) 变质作用和后来的低压 (ca. 0.3 GPa) 变质作用。