This Chapter considers triple oxygen isotope variations and their 4 Gyr temporal evolution in bulk siliciclastic sedimentary rocks and in granites. The δ18O and ∆′17O values provide new insights into weathering in the modern and ancient hydrosphere and coeval crustal petrogenesis. We make use of the known geological events and processes that affect the rock cycle: supercontinent assembly and breakup that influence continent-scale and global climate, the fraction of the exposed crust undergoing weathering, and isotopic values of precipitation.New data from a 5000 m Texas drillhole into the Oligocene Frio Formation demonstrate minimal isotopic shifts...

中文翻译：

---

不断演化的大陆壳，花岗岩和碎屑沉积物中的三重氧同位素

本章考虑了散装硅质碎屑沉积岩和花岗岩中的三重氧同位素变化及其4 Gyr时间演化。δ18O和∆′17O值为现代和古代水圈的风化以及近代地壳成岩提供了新的见识。我们利用影响岩石周期的已知地质事件和过程：影响大陆规模和全球气候的超大陆组装和破裂，经历风化的裸露地壳比例以及降水的同位素值.5000 m的新数据渐新世Frio组的德克萨斯钻孔显示出最小的同位素位移...