Field, Geochronologic, and Geochemical Constraints on the Early Mesozoic Paleogeographic and Tectonic Evolution of the Central Klamath Mountains, California
Author: Hannah Howell Scherer
Publisher:
Published: 2006
Total Pages: 398
ISBN-13: 9780542895814
DOWNLOAD EBOOKRodingites and metabasalts are present in a serpentinite matrix melange in the North Fork terrane. Low-grade metabasalts and low-Mg rodingites both have strong MORB trace element signatures. The most significant chemical changes that occurred during Ca-metasomatism are an increase in the concentration of CaO between 100 to 290% relative to the average metabasalt found in the melange, and the loss of K2O, Na2O, Ba, Rb, Cs, and Sr at levels close to 100%.