This paper presents a compilation of recent U-Pb （zircon） ages of late Carboniferous-early Permian （LC EP） calc-alkaline batholiths from lberia, together with a petrogenetic interpretation of magma generation base...This paper presents a compilation of recent U-Pb （zircon） ages of late Carboniferous-early Permian （LC EP） calc-alkaline batholiths from lberia, together with a petrogenetic interpretation of magma generation based on comparisons with Mesozoic and Tertiary Cordilleran batholiths and experimental melts. Zircon U-Pb ages distributed over the range ca. 315-280 Ma, indicate a linkage between calc-alkaline magmatism, Iberian orocline generation and Paleotethys subduction. It is also shown that Iberian LC-EP calcalkaline batholiths present unequivocal subduction-related features comparable with typical Cordilleran batholiths of the Pacific Americas active margin, although geochemical features were partially obscured by local modifications of magmas at the level of emplacement by country rock assimilation. When and how LC-EP calc-alkaline batholiths formed in Iberia is then discussed, and a new and somewhat controversial interpretation for their sources and tectonic setting （plume-assisted relamination） is suggested. The batholiths are proposed to have formed during the subduction of the Paleotethys oceanic plate （Pangaea self-subduction） and, consequently, they are unrelated to Variscan collision. The origin of the Iberian batholiths is related to the Eurasian active margin and probably represents the inception of a Paleotethvan arc in the core of Pangaea.展开更多
The principle of habitable planets creation of near stars in our galaxy was developed. It was shown that the Earth and the Moon formed as a result of thermal nuclear explosion (TNE) after a collision with a small come...The principle of habitable planets creation of near stars in our galaxy was developed. It was shown that the Earth and the Moon formed as a result of thermal nuclear explosion (TNE) after a collision with a small comet. The comet has broken through the proto-Earth crust, and created conditions for liquid-drop division into the Earth and the Moon. It is shown that the comet impact on the proto-Earth led to formation of continents as well as to formation of the Moon, seas, oceans and atmosphere and to creation of conditions for life origin. The analysis of kimberlitic pipes distribution, as markers of comet fragments motion under a crust, shows that the comet has broken up under crust with formation of many gas bubbles. An analysis of the Martian topography revealed that the comet hit Mars not under a glancing angle. As a result, the products of TNE remained under the Marian crust. The track of the comet movement under the Venus crust was also established. It is shown that the planet surface near comet track is spotted by numerous cracks.展开更多
The great palaeontological achievements of the Russian scientists Amalitsky and Sobolev,who worked in Russia and Poland at the turn of nineteenth and twentieth centuries,have previously been outlined in detail.However...The great palaeontological achievements of the Russian scientists Amalitsky and Sobolev,who worked in Russia and Poland at the turn of nineteenth and twentieth centuries,have previously been outlined in detail.However,their original and surprisingly modern concepts of the development of life on earth have received far less attention.Amalitsky was one of the first scholars who considered the intimate relationship between floral and faunal evolution and the interdependence between a developing biosphere and geological processes.In fact,he documented,for the first time,the existence of a single palaeobiogeographical province during the Permian Period,which we now refer to as the supercontinent Pangaea.In 1896,Amalitsky’s main idea was that there were extended periods of gradual change in topography and biosphere of the earth,but that it was orogenic activity that had a marked impact on biotic crises.His pupil at Warsaw University,Sobolev,followed up on his work,and in fact came up with the theory of neocatastrophism in 1928.Thus,Amalitsky’s model predates the concept of cyclic evolution of the biosphere in dependence on orogenic cycles,with a prime role for volcanism,which is currently well known as the“volcanic greenhouse”.Sobolev also recognised four main mass extinctions,i.e.,the late Ordovician,the late Devonian,the late Triassic and the Cretaceous/Paleogene ones,but somehow he‘missed out on’the end-Permian catastrophe.展开更多
基金financial support that comes from the Research Projects "GOLD"(FCT-PTDC/GEO-GEO/2446/2012FCOMP-01-0124-FEDER-029192)"PLUVOLC"(No.CGL201022022)
文摘This paper presents a compilation of recent U-Pb （zircon） ages of late Carboniferous-early Permian （LC EP） calc-alkaline batholiths from lberia, together with a petrogenetic interpretation of magma generation based on comparisons with Mesozoic and Tertiary Cordilleran batholiths and experimental melts. Zircon U-Pb ages distributed over the range ca. 315-280 Ma, indicate a linkage between calc-alkaline magmatism, Iberian orocline generation and Paleotethys subduction. It is also shown that Iberian LC-EP calcalkaline batholiths present unequivocal subduction-related features comparable with typical Cordilleran batholiths of the Pacific Americas active margin, although geochemical features were partially obscured by local modifications of magmas at the level of emplacement by country rock assimilation. When and how LC-EP calc-alkaline batholiths formed in Iberia is then discussed, and a new and somewhat controversial interpretation for their sources and tectonic setting （plume-assisted relamination） is suggested. The batholiths are proposed to have formed during the subduction of the Paleotethys oceanic plate （Pangaea self-subduction） and, consequently, they are unrelated to Variscan collision. The origin of the Iberian batholiths is related to the Eurasian active margin and probably represents the inception of a Paleotethvan arc in the core of Pangaea.
文摘The principle of habitable planets creation of near stars in our galaxy was developed. It was shown that the Earth and the Moon formed as a result of thermal nuclear explosion (TNE) after a collision with a small comet. The comet has broken through the proto-Earth crust, and created conditions for liquid-drop division into the Earth and the Moon. It is shown that the comet impact on the proto-Earth led to formation of continents as well as to formation of the Moon, seas, oceans and atmosphere and to creation of conditions for life origin. The analysis of kimberlitic pipes distribution, as markers of comet fragments motion under a crust, shows that the comet has broken up under crust with formation of many gas bubbles. An analysis of the Martian topography revealed that the comet hit Mars not under a glancing angle. As a result, the products of TNE remained under the Marian crust. The track of the comet movement under the Venus crust was also established. It is shown that the planet surface near comet track is spotted by numerous cracks.
文摘The great palaeontological achievements of the Russian scientists Amalitsky and Sobolev,who worked in Russia and Poland at the turn of nineteenth and twentieth centuries,have previously been outlined in detail.However,their original and surprisingly modern concepts of the development of life on earth have received far less attention.Amalitsky was one of the first scholars who considered the intimate relationship between floral and faunal evolution and the interdependence between a developing biosphere and geological processes.In fact,he documented,for the first time,the existence of a single palaeobiogeographical province during the Permian Period,which we now refer to as the supercontinent Pangaea.In 1896,Amalitsky’s main idea was that there were extended periods of gradual change in topography and biosphere of the earth,but that it was orogenic activity that had a marked impact on biotic crises.His pupil at Warsaw University,Sobolev,followed up on his work,and in fact came up with the theory of neocatastrophism in 1928.Thus,Amalitsky’s model predates the concept of cyclic evolution of the biosphere in dependence on orogenic cycles,with a prime role for volcanism,which is currently well known as the“volcanic greenhouse”.Sobolev also recognised four main mass extinctions,i.e.,the late Ordovician,the late Devonian,the late Triassic and the Cretaceous/Paleogene ones,but somehow he‘missed out on’the end-Permian catastrophe.
