Active tectonics in an area includes ongoing or recent geologic events.This paper investigates the tectonic influence on the subsidence,uplift and tilt of western Saurashtra through morphotectonic analysis of ten wate...Active tectonics in an area includes ongoing or recent geologic events.This paper investigates the tectonic influence on the subsidence,uplift and tilt of western Saurashtra through morphotectonic analysis of ten watersheds along with characteristics of relief and drainage orientation.Watersheds 7-9 to the north(N)are tectonically active,which can be linked with the North Kathiawar Fault System(NKFS)and followed by watersheds 6,10,1,4 and 5.Stream-length gradient index and sinuosity index indicate the effect of tectonic events along the master streams in watersheds 6-9.Higher R^(2)values of the linear curve fit for watershed 7 indicate its master stream is much more tectonically active than the others.The R^(2)curve fitting model and earthquake magnitude/depth analysis confirm the region to be active.The reactivation of the NKFS most likely led to the vertical movement of western Saurashtra.展开更多
The Campi Flegrei volcanic district includes insular (Ischia and Procida Islands) and peninsular volcanic activity (Campi Flegrei volcanic field) with the link to older activity till Ponza Island. The history of this ...The Campi Flegrei volcanic district includes insular (Ischia and Procida Islands) and peninsular volcanic activity (Campi Flegrei volcanic field) with the link to older activity till Ponza Island. The history of this area has been studied in detail since the eruption of the Campanian Ignimbrite (CI, age: 39 ky BP, volume: 200 - 300 km3), which makes this one of the most powerful eruptions in Europe. In the Neapolitan Yellow Tuff (NYT: age: 15.0 ky BP, volume: 50 km3), another powerful eruption occurred. Activity younger than the NYT can be subdivided in three epochs which include 70 recognized ephemeral eruptions. The volume of these individual eruptions is between 0.4 and 1 km3 (DRE). Probably, the long-lasting magma reservoirs (i.e., CI and NYT) represent eruptions that are fed by deep magma reservoirs. In deep reservoirs (>10 km), magmas stagnate, differentiate and are probably modified by crustal components (Hercynian basement). The long-lasting reservoirs are also the ones that feed the ephemeral shallow magmatic system (2 - 5 km) that gave rise to the post-caldera magmatic epochs. However, the magmas of the post-caldera epochs are isotopically heterogeneous and made by several components (i.e., least evolved (as an example the Minopoli eruption, 9500 y BP), CI, and NYT components). Mixing between ephemeral shallow reservoirs occurs. Mixing of long lasting reservoirs also occurs;and also during explosive eruptions. The concentration of earthquakes and the deformation history suggest that Campi Flegrei could erupt again with an ephemeral eruption, especially if the uplift will reach 5 - 6 m like Monte Nuovo eruption, given existing uplift of 1970-72 and 1983-84.展开更多
The existing research findings of our environmental history fail to attach due importance to the environmental history of ancient China. The studies of China's environmental history should extend the time scope fu...The existing research findings of our environmental history fail to attach due importance to the environmental history of ancient China. The studies of China's environmental history should extend the time scope further to more ancient times and raise interdisciplinary research awareness. Such studies can help us trace our sources of culture and ecology, and better understand the current world and humanity itself. Studies on the environmental history of ancient China also need to be equipped with corresponding research concepts, orientation and approaches.展开更多
In the Schoningen open-pit lignite mine (Northeastern Lower Saxony, Germany),Tertiary strata are unconformably overlain by Quaternary sediments and soils of Middle and LatePleistocene and Holocene age. The complex Ple...In the Schoningen open-pit lignite mine (Northeastern Lower Saxony, Germany),Tertiary strata are unconformably overlain by Quaternary sediments and soils of Middle and LatePleistocene and Holocene age. The complex Pleistocene sequence contains a number ofinterglacial and interstadial deposits and soils and is of scientific importance for Late MiddlePleistocene stratigraphy of Central Europe and because of archeological evidence of early humanoccupation by Home erectus. There is evidence of four interglacials younger than the third-lastglaciation (Elsterian). The classical Holsteinian is followed by the newly discoveredbiostratigraphic unit Reinsdorf, an interglacial complex which contains archeological horizonswith wooden artifacts. Based on paleoecological fauna and flora data, the lithological setting andpreliminary age determinations, the Reinsdorf Interglacial likely correlates with marine isotopestage 9 and the Holsteinian with stage 11.展开更多
Digital Earth is an information-rich expression of the real Earth and is a new way of understanding the Earth in the twenty-first century.Archeology has found great potentialities in Digital Earth,strongly increasing ...Digital Earth is an information-rich expression of the real Earth and is a new way of understanding the Earth in the twenty-first century.Archeology has found great potentialities in Digital Earth,strongly increasing its development and its interdisciplinary experimentations.With the rapid development of remote sensing,the importance of applying Earth observation technology to archeological research has caught a great amount of attention worldwide.The objective of this study is to apply Radarsat-1 and Landsat imagery,historical maps,and aerial photographs in the detection and verification of disappeared reservoirs built 500 years ago as part of the Grand Canal of China.The results of the study show that the potential sites present distinct variations in soil moisture,biomass,and biological vigor,characterized by weak backscattering in Radarsat imagery;high vegetation indices in Landsat imagery;and distinct anomalies in a Landsat principle components image.Historical maps and aerial photographs also verified the existence of the sites of disappeared reservoirs.Since the sites have so far not been extensively explored,the results should represent a significant contribution to the understanding of the Grand Canal of China and its auxiliary facilities.展开更多
The development of spaceborne Synthetic Aperture Radar(SAR)technology declares that the golden era of SAR remote sensing in archeology is approaching;however,nowadays its methodology framework is still lacking due to ...The development of spaceborne Synthetic Aperture Radar(SAR)technology declares that the golden era of SAR remote sensing in archeology is approaching;however,nowadays its methodology framework is still lacking due to the inadequate case studies validated by ground-truths.In this study,we investigated the crop marks using multi-temporal Cosmo-SkyMed data acquired in 2013 by applying a twostep decision-tree classifier in conjunction with a spatial analysis in an area of archeological interest nearby the archeological site of Han-Wei capital city(1900–1500 BP),in Luoyang,China.The time-series backscattering anomalies related to the wheat growth cycle were identified and then further validated in two zones by geophysical investigations(Ground Penetration Radar and electrical measurements)and in a third zone by archeological excavations made after the SAR data acquisition.This study provides a new approach for the relic detection,shallowly buried and covered by the crop vegetation,by temporal crop marks on spaceborne SAR images.We also emphasize the necessity to establish a satellite-to-ground methodology framework for the promotion of remote-sensing technology in archeology.展开更多
基金Research Development Fund(IIT Bombay)supported SM。
文摘Active tectonics in an area includes ongoing or recent geologic events.This paper investigates the tectonic influence on the subsidence,uplift and tilt of western Saurashtra through morphotectonic analysis of ten watersheds along with characteristics of relief and drainage orientation.Watersheds 7-9 to the north(N)are tectonically active,which can be linked with the North Kathiawar Fault System(NKFS)and followed by watersheds 6,10,1,4 and 5.Stream-length gradient index and sinuosity index indicate the effect of tectonic events along the master streams in watersheds 6-9.Higher R^(2)values of the linear curve fit for watershed 7 indicate its master stream is much more tectonically active than the others.The R^(2)curve fitting model and earthquake magnitude/depth analysis confirm the region to be active.The reactivation of the NKFS most likely led to the vertical movement of western Saurashtra.
文摘The Campi Flegrei volcanic district includes insular (Ischia and Procida Islands) and peninsular volcanic activity (Campi Flegrei volcanic field) with the link to older activity till Ponza Island. The history of this area has been studied in detail since the eruption of the Campanian Ignimbrite (CI, age: 39 ky BP, volume: 200 - 300 km3), which makes this one of the most powerful eruptions in Europe. In the Neapolitan Yellow Tuff (NYT: age: 15.0 ky BP, volume: 50 km3), another powerful eruption occurred. Activity younger than the NYT can be subdivided in three epochs which include 70 recognized ephemeral eruptions. The volume of these individual eruptions is between 0.4 and 1 km3 (DRE). Probably, the long-lasting magma reservoirs (i.e., CI and NYT) represent eruptions that are fed by deep magma reservoirs. In deep reservoirs (>10 km), magmas stagnate, differentiate and are probably modified by crustal components (Hercynian basement). The long-lasting reservoirs are also the ones that feed the ephemeral shallow magmatic system (2 - 5 km) that gave rise to the post-caldera magmatic epochs. However, the magmas of the post-caldera epochs are isotopically heterogeneous and made by several components (i.e., least evolved (as an example the Minopoli eruption, 9500 y BP), CI, and NYT components). Mixing between ephemeral shallow reservoirs occurs. Mixing of long lasting reservoirs also occurs;and also during explosive eruptions. The concentration of earthquakes and the deformation history suggest that Campi Flegrei could erupt again with an ephemeral eruption, especially if the uplift will reach 5 - 6 m like Monte Nuovo eruption, given existing uplift of 1970-72 and 1983-84.
基金a staged research result of "Studies on Energy Crisis in Ancient North China and Corresponding Socio-ecological Change"(14CZS035)a youth program founded by National Social Sciences Fund and"Multi-volume History of Chinese Ecological Environment"(13&ZD080)a major program supported by National Social Sciences Fund
文摘The existing research findings of our environmental history fail to attach due importance to the environmental history of ancient China. The studies of China's environmental history should extend the time scope further to more ancient times and raise interdisciplinary research awareness. Such studies can help us trace our sources of culture and ecology, and better understand the current world and humanity itself. Studies on the environmental history of ancient China also need to be equipped with corresponding research concepts, orientation and approaches.
文摘In the Schoningen open-pit lignite mine (Northeastern Lower Saxony, Germany),Tertiary strata are unconformably overlain by Quaternary sediments and soils of Middle and LatePleistocene and Holocene age. The complex Pleistocene sequence contains a number ofinterglacial and interstadial deposits and soils and is of scientific importance for Late MiddlePleistocene stratigraphy of Central Europe and because of archeological evidence of early humanoccupation by Home erectus. There is evidence of four interglacials younger than the third-lastglaciation (Elsterian). The classical Holsteinian is followed by the newly discoveredbiostratigraphic unit Reinsdorf, an interglacial complex which contains archeological horizonswith wooden artifacts. Based on paleoecological fauna and flora data, the lithological setting andpreliminary age determinations, the Reinsdorf Interglacial likely correlates with marine isotopestage 9 and the Holsteinian with stage 11.
基金This work is part of interdisciplinary research programs(grant number:41001272 and 2010BAK67B07)under the auspices of the National Science Foundation of China and Ministry of Science and Technology of China,respectively。
文摘Digital Earth is an information-rich expression of the real Earth and is a new way of understanding the Earth in the twenty-first century.Archeology has found great potentialities in Digital Earth,strongly increasing its development and its interdisciplinary experimentations.With the rapid development of remote sensing,the importance of applying Earth observation technology to archeological research has caught a great amount of attention worldwide.The objective of this study is to apply Radarsat-1 and Landsat imagery,historical maps,and aerial photographs in the detection and verification of disappeared reservoirs built 500 years ago as part of the Grand Canal of China.The results of the study show that the potential sites present distinct variations in soil moisture,biomass,and biological vigor,characterized by weak backscattering in Radarsat imagery;high vegetation indices in Landsat imagery;and distinct anomalies in a Landsat principle components image.Historical maps and aerial photographs also verified the existence of the sites of disappeared reservoirs.Since the sites have so far not been extensively explored,the results should represent a significant contribution to the understanding of the Grand Canal of China and its auxiliary facilities.
基金This research was supported by funding from Hundred Talents Program of the Chinese Academy of Sciences(CAS)(Y5YR0300QM)Youth Director Fund Category-A of Institute of Remote Sensing and Digital Earth,CAS and the Italian Ministry of Foreign Affairs and ATHENA project H2020-TWINN2015 of European Commission.
文摘The development of spaceborne Synthetic Aperture Radar(SAR)technology declares that the golden era of SAR remote sensing in archeology is approaching;however,nowadays its methodology framework is still lacking due to the inadequate case studies validated by ground-truths.In this study,we investigated the crop marks using multi-temporal Cosmo-SkyMed data acquired in 2013 by applying a twostep decision-tree classifier in conjunction with a spatial analysis in an area of archeological interest nearby the archeological site of Han-Wei capital city(1900–1500 BP),in Luoyang,China.The time-series backscattering anomalies related to the wheat growth cycle were identified and then further validated in two zones by geophysical investigations(Ground Penetration Radar and electrical measurements)and in a third zone by archeological excavations made after the SAR data acquisition.This study provides a new approach for the relic detection,shallowly buried and covered by the crop vegetation,by temporal crop marks on spaceborne SAR images.We also emphasize the necessity to establish a satellite-to-ground methodology framework for the promotion of remote-sensing technology in archeology.
