The southern Sichuan Basin in China holds abundant shale gas resources; however, the bearing property shows great differences due to multiple stages of tectonic transformation. key revealing differential enrichment mechanism is explore thermal evolution characteristics during evolution. Therefore, taking Luzhou and Changning blocks as an example, which have obvious evolution, organic geochemica...

The Pacific margin of East Antarctica records a long tectonic history of crustal growth and breakup, culminating in the early Paleozoic Ross Orogeny associated with Gondwanaland amalgamation. Periods of older tectonism have been proposed (e.g. Precambrian Nimrod and Beardmore Orogenies), but the veracity of these events is difficult to document because of poor petrologic preservation, geochrono...

Many of the veins enclosed within the Paleozoic basement of the Catalonian Coastal Ranges show severa1 common characteristics: low temperature of formation (between 75 and 200°C), the presence of complex polisaline fluids and a certain relationship to the pretriassic paleosurface. Mineralogical composition and age are variable, ranging from Pb-Zn veins with carbonate gangue of late Hercynian ag...

Multistage fluid activities and hydrocarbon accumulation processes have occurred in the Dengying Formation of Sichuan Basin during its long geological history. Petrography cathodoluminescence observations; situ microanalysis rare earth elements, carbon, oxygen, strontium isotopes; inclusion microthermometric experiments; laser Raman burial history; thermal generation history simulation been app...

The formation of continental crust in the Mongolia-Transbaikalia region is researched to identify mechanisms interactions between and mantle development Neoarchean, Proterozoic Paleozoic magmatic sedimentary complexes study area. Using results his own studies conducted for many years other published data on this vast Central Asia, author have analysed compositions, ages conditions Karelian, Bai...

The stress configuration and tectonic analysis of the Pan – African orogeny is drawn from the Igarra schist belt, southwestern Nigeria. The analysis of conjugate shear fractures of the schist belt indicates that two distinct compressive events (NE – SW and E – W) occurred in this Pan – African mobile zone. The palaeostress systems reveal a clockwise rotation of compressional axis from D1 (NE – ...

It is generally accepted that continental subduction and crustal exhumation play an important role in the evolution of many orogenic belts. A variety of geological evidence suggests that continental crust is occasionally subducted to depths of tens to perhaps 150 km (e.g. Chopin, 1984; Dewey et al., 1993; Matte et al., 1997). Recently, a series of simulations (Chemenda, 1993; Chemenda et al., 1...