Early studies on Melanesian mountain systems provided insights for fundamental evolutionary and ecological concepts. These island-like systems are thought to provide opportunities in the form of newly formed, competition-free niches. Here we show that a hyperdiverse radiation of freshwater arthropods originated in the emerging central New Guinea orogen, out of Australia, about 10 million years ...

Over summer 2017, I continued my research on dikes emplaced during the waning stages of the Neoproterozoic-Ordovician Ross Orogen, a continental arc along the present day location of the Transantarctic Mountains in Antarctica. The dikes intrude calc-alkaline plutons constituting the main intrusive phase as well as metasedimentary rocks formed during early stages of orogenesis. These dikes compr...

The Early Paleozoic Lachlan Fold Belt of eastern Australia is widely regarded as an ancient convergent plate margin beneath which paleo-Pacific (Panthalassic) oceanic lithosphere was continuously subducted. It is cited as the type example of a retreating accretionary orogeny. However, sandstone compositions, the sedimentological nature and timing of chert accumulation and overall stratigraphic ...

Abstract Orogenic degassing is emerging as a potentially relevant source of carbon dioxide (CO 2 ) from the continental crust. However, processes mobilization are still poorly explored. Here, we use thermodynamic modeling to investigate decarbonation sediments metamorphosed under high geothermal gradients. Our shows that immiscible CO -rich vapors and hydrosaline brines generated at these condi...

Magmatism between 1.3 and 0.9 Ga at the southwestern margin of Fennoscandia, comprising mainly granitic batholiths subordinate bimodal volcanic rocks, provides a nearly continuous magmatic record Fennoscandian tectonic evolution. Here, we present new published zircon Hf, K-feldspar Pb whole-rock Sr isotopic data from rocks. The ?Hf evolution since 1300 Ma starts out as relatively juvenile, with...

The İstanbul-Zonguldak Tectonic Unit is regarded as the easternmost fragment of Avalonia-Carolina and stands for Far East Avalonia. Its stratigraphy also characterized by discontinuous sedimentation from Late Ediacaran to Carboniferous. In western part block, known İstanbul Terrane, Gözdağ Formation represented lagoonal sedimentary rocks consisting shale-sandstone with limestone Middle Ordovici...

The sources of the Paleocene London Basin marine to fluviodeltaic sandstones are currently unclear. High analysis number detrital zircon U-Pb age investigation an early-mid Thanetian sand from East Kent, reveals a large spread peaks indicative range primary sources. In particular, strong Ediacaran peak is associated with Cadomian Orogeny, while secondary represent Caledonian and various Mesopro...