Journal of The Virtual Explorer最新文献

{"title":"Evolution of the Dunefields of the Strzelecki Desert","authors":"K. Lilly","doi":"10.3809/JVIRTEX.2005.00140","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2005.00140","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128816414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Granites really are magmatic : using microstructural evidence to refute some obstinate hypotheses","authors":"R. Vernon","doi":"10.3809/JVIRTEX.2011.00264","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2011.00264","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129033636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fold geometry and constitutive behaviour","authors":"B. Hobbs, H. B. Mulhaus, A. Ord, Yanhua Zhang, L. Moresi","doi":"10.3809/JVIRTEX.2000.00014","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2000.00014","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130737104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Arc-trench-back arc systems in the Mediterranean area: examples of extrusion tectonics","authors":"E. Mantovani, D. Albarello, D. Babbucci, C. Tamburelli, M. Viti","doi":"10.3809/JVIRTEX.2002.00050","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2002.00050","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116683741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Post collisional transpressive tectonics in northern Sardinia (Italy)","authors":"R. Carosi, C. Frassi, D. Iacopini, C. Montomoli","doi":"10.3809/JVIRTEX.2005.00118","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2005.00118","url":null,"abstract":"The aim of this work is to review and synthetize the geological and structural analysis performed in the Variscan Basement of Northern Sardinian during the last ten years and to add new preliminary data on the Anglona-SW Gallura area. A transpressive crustal- scale deformation (D2), is documented in the Variscan Basement of northern Sardinia. A shear deformation parallel to the belt, overprinting previous D1 structures related to a top- to-the S and SW nappe stacking, has been recognized. The L2 stretching lineation points to an orogen-parallel stretching and to a general change in the tectonic transport from D1 to D2 deformation phases. D1 phase developed during initial frontal collision whereas D2 defor- mation was characterized by dextral shearing. In this sector of the Variscan belt exhumation is due to continuing compression with an increasing component of horizontal displacement developed in a regime of decreasing pressure. The D2 transpressional deformation enhanced telescoping of the Barrovian isogrades and the exhumation of the low- to medium-grade metamorphic rocks. The overall change of the shortening direction in a large sector of an orogenic belt with the occurrence of increasing orogen-parallel displacement, may be re- garded as a general mechanism affecting the exhumation of rocks and preventing the overthickened and thermally softened collisional crust from undergoing a diffused gravita- tional collapse. The rotation of nearly 90° of the tectonic transport in Sardinia during collisional and post-collisional stages could be related to paleoposition of the Corsica-Sar- dinia block, close to southeast France and northeast Spain, and to the development of the Ibero-Armorican arc.","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116697603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Origin of the South Australian Heat Flow Anomaly","authors":"I. Kovács","doi":"10.3809/JVIRTEX.2005.00137","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2005.00137","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116984242","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary facies of the Paleogene Ganchaigou Formation in the North-West Qaidam Basin, Western China","authors":"Le Li, Ping Guan, Wentao Zhang, Binbin Du, Guoyuan He","doi":"10.3809/JVIRTEX.2011.00278","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2011.00278","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117250774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deep Seismic Sounding Studies In India And Its Tectonic Implications","authors":"H. Tewari, Prakash Kumar","doi":"10.3809/JVIRTEX.2003.00080","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2003.00080","url":null,"abstract":"Deep Seismic Sounding (DSS) studies of the Indian continental crust were initiated in 1972 by the NGRI under an Indo-Soviet program. Subsequently, DSS experiments to delineate the shallow and deep structural features have been conducted in various parts of the country. Seismic refraction and wide-angle reflection data sets were acquired along more than 5000 km of profiles, including about 800 km of deep reflection profiles, in a variety of geologic and tectonic settings. Most of the studies were concentrated in the Archaean-Proterozoic peninsular shield, the southern granulitic terrain, the late Cretaceous Deccan Trap cover region of western India, across Narmada-Son lineament, the sedimentary basins of Cambay, West Bengal, Mahanadi & Godavari and the Kashmir Himalayan region. Since 1985 the data are being recorded in the digital form. The basic outcome of these studies is the determination of the velocity depth structures upto the crust-mantle boundary (Moho), in the above provinces and its imprint on the tectonics and evolution of various terrains. The amalgamation of the crustal seismic data with geologic and other geophysical data have provided new insight to a better understanding of the tectonic processes involved in the dynamics and evolution of the Indian crust. In this paper we have focused on the results after 1992 only. The deep reflection profiling studies carried out across the Paleo-Meso-proterozoic Aravalli Delhi Fold Belt and the Archaean Bhilwara Gneissic Complex in the northwest Indian platform suggest a zone of Proterozoic collision. The Delhi Fold Belt appears to be a zone of thick (45-50 km) crust where the lower crust has doubled in width. The dynamics of the central Indian region is controlled by the east-west trending deep-seated faults systems viz. the Narmada North Fault and Narmada South Fault. Another NE-SW trending fault, the Barwani-Sukta fault, divides the upper crust in two parts, the eastern part being a basement uplift and the western a sedimentary graben under the Deccan Traps. This fault appears to be the northern limit of the Deccan Trap covered sedimentary graben. A mafic intrusion in the upper crust, represented by high velocity/density body to the east of the Barwani-Sukta fault, seems to have played significant role in shaping the present structural trends of the Narmada region. The Moho depth in the central Indian region varies between 38 and 44 km. In the West Bengal basin the crustal thickness is ~30 km. Further studies indicate the probable trace of a plume in the continental region, NNW-SSE trending path east of 87° E with an up-warp in Moho. A four-layered crustal velocity structure, with a low velocity zone at depths of 7-15 km is seen on the north-south profile over the south Indian granulite terrain. The crustal thickness varies between 41-45 km. INTRODUCTION The present day configuration of continental crust is mostly an outcome of lithospheric evolution and crust-mantle interaction. To understa","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134451471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modification Of Geological And Geophysical Regimes Due To Interaction Of Mantle Plume With Indian Lithosphere","authors":"U. Raval, K. Veeraswamy","doi":"10.3809/JVIRTEX.2003.00079","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2003.00079","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133293741","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scale effects and rheologic constraints in ramp-flat thrust models","authors":"G. Mulugeta","doi":"10.3809/JVIRTEX.2002.00044","DOIUrl":"https://doi.org/10.3809/JVIRTEX.2002.00044","url":null,"abstract":"","PeriodicalId":201383,"journal":{"name":"Journal of The Virtual Explorer","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122902013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}