Detrital zircon geochronology is frequently used for sediment provenance analysis in orogenic belts, but it can also be applied to locate the boundary between basement and sedimentary cover in successions and tectonometamorphic units where the paleontological record is missing, and primary stratigraphic relationships have been erased by intense deformation and/or metamorphism. This is critical to differentiate metamorphic mineral associations, P-T conditions and deformational events associated with superposed orogenic cycles. In this work, detrital zircon geochronology has been applied to the Ronda peridotites’ crustal hanging wall (hinterland of the Alpine Betic Cordillera, southern Spain), apparently made up of two major tectonic units – the Jubrique unit and the Maláguide complex – separated by a major Alpine tectonic contact camouflaged in between low-grade metamorphic rocks.

中文翻译：

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使用 U-Pb 碎屑锆石系统学来约束西班牙南部龙达橄榄岩地壳上盘的结构和来源


碎屑锆石年代学经常用于造山带的沉积物物源分析，但它也可用于定位基底和沉积盖层之间的边界，以及古生物记录缺失、原始地层关系已被强烈抹除的连续和构造变质单元。变形和/或变质。这对于区分变质矿物组合、PT 条件和与叠加造山旋回相关的变形事件至关重要。在这项工作中，碎屑锆石年代学已应用于隆达橄榄岩的地壳上盘（西班牙南部阿尔卑斯贝蒂克科迪勒拉腹地），该上盘显然由两个主要构造单元组成：Jubrique 单元和 Maláguide 复合体，中间由一个主要的阿尔卑斯构造接触面隐藏在低品位变质岩之间。