The Granite-Rhyolite Province: An example of Middle Proterozoic Crustal Growth and Evolution

这项与罗伯特·D·舒斯特合作的建议旨在研究中元古代花岗岩-流纹岩省的生长和演化。该地体位于北美大陆中南部，除三个露头区域外，被显生宙沉积岩埋藏。来自堪萨斯大学露头、岩芯和岩屑的受年龄限制的样品将被用来确定其铅和钕的同位素组成和化学成分(主、痕量和稀土)。这项研究将旨在限制这一大片高度演化和独特的元古界地壳的形成和演化的潜在源区、过程和构造模式。

This collaborative proposal with Robert D. Shuster aims to study the growth and evolution of the Middle Proterozoic Granite- Rhyolite Province. This terrane underlies the south central North American continent and except for three areas of outcrop, is buried by Phanerozoic sedimentary rocks. Age constrained samples from outcrops and from cores and cuttings housed at the University of Kansas will be used to determine their Pb and Nd isotopic compositions and chemical (major, trace, and REE) compositions. This study will be directed at constraining potential source areas, processes, and tectonic models for the formation and evolution of this large area of highly evolved and unique Proterozoic crust.