Collapsed reflections of lower Ordovician carbonates and upper Carboniferous-lower Permian coal-bearing strata occur below the middle Shihezi Formation in Hangjinqi area, northern Ordos Basin. This study takes advantage three-dimensional seismic data, logging core data well-testing to investigate genesis collapsed their implications for hydrocarbon potential. These collapse structures have a su...

Recent evidence quite convincingly indicates that the Late Permian biotic crisis was in fact a binary extinction with a distinct end-Guadalupian extinction pulse preceding the major terminal end-Permian Tartarian event by 5 million years. In addition anoxia appears to be closely associated with each of these end-Paleozoic binary extinctions. Most leading models cannot explain both anoxia and th...

Precambrian and Early Paleozoic magmatic activities in the Lhasa terrane provides important context for distinguishing between North South terranes, deciphering nature geotectonic history of northern margin Rodinia Gondwana supercontinents. Here, we conducted a detailed petrological, geochemical, geochronological study mafic to granitic meta-intrusive rocks Bomi complex eastern segment terrane....

Many of the late Paleozoic granitoid plutons of the southern Appalachians are composite bodies with coarsegrained amphibole + biotite and biotite varietal facies (Speer et al., 1980). From field relations, these facies appear closely related, and multiple intrusion or differentiation comes to mind as an explanation for the relationship. In the Liberty Hill pluton, the coarse-grained central amp...