The South China Craton comprises the Yangtze and Cathaysia blocks is one of largest Precambrian continental in East Asia. However, early geological geographical evolution block relatively poorly understood, due to sparse exposure pre-Neoproterozoic rocks reworking during Phanerozoic polyphase magmatism metamorphism. In this contribution, we carried out detrital zircon U-Pb geochronology sedimen...

Abstract The Oulongbuluke Block is an integral part of the Columbia and Rodinia supercontinents, but lack rock records from transitional period between supercontinents during mid–late Mesoproterozoic has impeded our understanding tectonic relationship Block, which lies supercontinents. In this contribution, we present a systematic petrographic, geochemical, zircon U-Pb-Hf investigation newly di...

Authigenic seafl oor carbonate crusts include fenestrate microbialite, thrombolite, and four types here designated: Fine-grained Crust, Sparry Crust, Hybrid Sparry Fine-grained Crust, and Sparry Crust plus Coarse Grains. Each of the latter four types includes at least some layered examples that have generally been regarded as stromatolites. Recognition and interpretation of these various deposi...

Based on Phanerozoic and present-day cases, aeolian systems are categorised into dry, wet stabilising types. It is questioned here whether these models applicable to Proterozoic when environmental conditions the Earth's surface were markedly different. Facies architectural-element analyses have been applied Mesoproterozoic succession of Galho do Miguel Formation, SE Brazil. The aim identify dis...

Mafic dykes of lamprophyric affinity cropping out along the coastal area Montevideo city are described. These trend N75º-85º and crosscut 2.1 Ga Paleoproterozoic metamorphic units Rio de la Plata craton. They show mainly porphyritic textures with phlogopite clinopyroxene macrocrysts in a groundmass composed carbonates, phlogopite, augite, feldspathoids. Ocellar structures filled by leucite, car...

Hydrogen-lean kerogens (atomic H/C 0.4) isolated from the 2.5-billion-year-old (Ga) Mt. McRae Shale, Hamersley Group, at Tom Price, Western Australia, were studied via hydropyrolysis, a continuous-flow technique that degrades organic matter in a stream of high-pressure hydrogen assisted by a dispersed Mo catalyst. The hydropyrolysates yielded predominantly phenanthrene and pyrene, and higher po...