Silurian plutonism in the Trinity terrane (Neoproterozoic and Ordovician), Klamath Mountains, California, United States

Article Abstract:

A major early Paleozoic shear zone formed in the eastern Klamath Mountains after the Middle Ordovician but before late Silurian plutonism. About one third of the Trinity terrane comprises of Silurian intrusive rocks, which is representative of the roots of an earlier unidentified Silurian magmatic arc. At least one early Paleozoic deformation in the Trinity terrane of northern of northern California is documented by crosscutting relations and U-Pb zircon isotopic data.

California, Silurian period, Trinity Alps

---

The Amazon-Laurentian connection as viewed from the Middle Proterozoic rocks in the central Andes, western Bolivia and northern Chile

Article Abstract:

Basement rocks in the Central Andes and their connection to possible rifted or equivalent fragments found on other continents are investigated. A U-Pb geochronologic and Pb isotopic study of Middle proterozoic rocks in western Bolivia and northern Chile is performed. Data show that Middle proterozoic rocks in the Arequipa-Antofalla craton are not reworked or metamorphosed Early Proterozoic rocks of the Arequipa massif.

Chile, Bolivia, Magmatism

---

Geochronology of the Proterozoic basement of southwesternmost North America, and the origin and evolution of the Mojave crustal province

Article Abstract:

It is hypothesized that the San Bernardino Mountains expose an Early Proterozoic plutonic arc.

Similar abstracts:

• Abstracts: Diffusion mesomatism in silica-undersaturated sapphirine-bearing granulite from Rumdoodle Peak, Framnes Mountains, east Antarctica
• Abstracts: Continental collision and lateral escape deformation in the lower and upper crust: An example from Caledonide Svalbard
• Abstracts: Photophysiology of the marine cyanobacterium Prochlorococcus: ecotypic differences among cultured isolates. The nutrient stoichiometry of benthic microalgal growth: Redfield proportions are optimal
• Abstracts: Transfer zones with en echelon faulting at the northern end of the Suez rift Mechanisms for accommodation of Miocene extension: Low-Angle normal faulting, magmatism, and secondary breakaway faulting in the southern Sacramento Mountains, southeastern California
• Abstracts: Policy statement: Tornado preparedness and safety. Hurricane research and forecasting. Prediction and mitigation of flash floods

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.