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The Bamble Sector,South Norway:A review 被引量:2
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作者 Timo G.Nijland Daniel E.Harlov tom andersen 《Geoscience Frontiers》 SCIE CAS CSCD 2014年第5期635-658,共24页
The Proterozoic Bamble Sector, South Norway, is one of the world's classic amphiboliteto granulite- facies transition zones. It is characterized by a well-developed isograd sequence, with isolated 'granulite-facies ... The Proterozoic Bamble Sector, South Norway, is one of the world's classic amphiboliteto granulite- facies transition zones. It is characterized by a well-developed isograd sequence, with isolated 'granulite-facies islands' in the amphibolite-facies portion of the transition zone. The area is notable for the discovery of C02-dominated fluid inclusions in the granolite-facies rocks by Jacques Touter in the late 1960's, which triggered discussion of the role of carbonic fluids during granulite genesis. The aim of this review is to provide an overview of the current state of knowledge of the Bamble Sector, with an emphasis on the Arendal-Froland-Nelaug-Tvedestrand area and off shore islands (most prominantly Tromay and Hisoy) where the transition zone is best developed. After a brief overview of the history of geological research and mining in the area, aspects of sedimentary, metamorphic and magmatic petrology of the Bamble Sector are discussed, including the role of fluids. Issues relevant to current geotectonic models for SW Scandinavia, directly related to the Bamble Sector, are discussed at the end of the review. 展开更多
关键词 Bamble SectorSouth NorwayCharnockiteAmphibolire- ro granulire-facies transitionCO2BrinesPrecambrian
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北欧湖泊的重金属调查:浓度、地理模式及与临界界限的关系 被引量:11
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作者 Brit Lisa Skjelkvle tom andersen +6 位作者 Eirik Fjeld Jaakko Mannio Anders Wilander Kjell Johansson Jens Peder Jensen Tatyana Moiseenko 孙学飞 《AMBIO-人类环境杂志》 2001年第1期2-10,70,共9页
1995年秋天,北欧各国同时对本国的湖泊进行了调查,包括俄罗斯西北的科拉半岛。在大约3000个湖泊中,被调查的11种金属(铅、镉、砷、锌、铜、镍、钴、铁、锰、铬、钒)一般浓度较低,并具有明确的地理模式。对于铅、镉、锌和一定程度上钴的... 1995年秋天,北欧各国同时对本国的湖泊进行了调查,包括俄罗斯西北的科拉半岛。在大约3000个湖泊中,被调查的11种金属(铅、镉、砷、锌、铜、镍、钴、铁、锰、铬、钒)一般浓度较低,并具有明确的地理模式。对于铅、镉、锌和一定程度上钴的分布,远程迁移的空气污染带来的直接和间接影响是最重要的因素。湖中总有机碳(TOC)浓度对于铁和锰,并在一定程度上对于砷、铬和钒是重要的。对于铜和镍,基岩地质概况是最重要的控制因素,但在科拉半岛很多冶炼厂周围地区是个例外,在那里由于当地空气传播的污染,湖泊中铜和镍的浓度很高。基岩和地表的地质概况对于控制砷、钴、铬和钒的浓度也是重要的因素。调查结果表明在北欧国家湖泊中重金属污染在区域尺度上是一个较轻微的生态问题。 展开更多
关键词 北欧 湖泊 重金属污染 浓度 地理模式 临界界限
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AAA—01北极地区显生宙古地理演化(二):北格陵兰、斯瓦尔巴特群岛和加拿大北极区晚白垩世沉积的碎屑锆石研究
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作者 Torkil S. Rφhr tom andersen +2 位作者 Henning Dypvik 孙桂华(译) 邱燕(校对) 《海洋地质》 2008年第3期44-45,共2页
晚侏罗世-早白垩世期间,北极盆地(包括巴伦支海、北格陵兰Wandel海盆地和加拿大北极区)是一个宽广的陆缘海,从东部Novaya Zemlya一直延伸到西部Sverdmp盆地。斯瓦尔巴特群岛晚白垩世Helvetiafjellet组、加拿大北极区Isachsen组、北... 晚侏罗世-早白垩世期间,北极盆地(包括巴伦支海、北格陵兰Wandel海盆地和加拿大北极区)是一个宽广的陆缘海,从东部Novaya Zemlya一直延伸到西部Sverdmp盆地。斯瓦尔巴特群岛晚白垩世Helvetiafjellet组、加拿大北极区Isachsen组、北格陵兰LichenRyg和Ladegrdsell组均沿该陆缘海西侧沉积。 展开更多
关键词 北极地区 晚白垩世 格陵兰 北极区 加拿大 古地理演化 碎屑锆石 沉积
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Dehydration Melting and Proterozoic Granite Petrogenesis in a Collisional Orogen——A Case from the Svecofennian of Southern Finland
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作者 tom andersen O.Tapani Rämö 《Journal of Earth Science》 SCIE CAS CSCD 2021年第6期1289-1299,共11页
Dehydration melting of metasupracrustal rocks at mid-to deep-crustal levels can generate water undersaturated granitic melt.In this study,we evaluate the potential of~1.89–1.88 Ga metasupracrustal rocks of the Precam... Dehydration melting of metasupracrustal rocks at mid-to deep-crustal levels can generate water undersaturated granitic melt.In this study,we evaluate the potential of~1.89–1.88 Ga metasupracrustal rocks of the Precambrian of southern Finland as source rocks for the 1.86–1.79 Ga late-orogenic leucogranites in the region,using the Rhyolite-MELTS approach.Melt close in composition to leucogranite is produced over a range of realistic pressures(5 to 8 kbar)and temperatures(800 to 850℃),at 20%–30%of partial melting,allowing separation of melt from unmelted residue.The solid residue is a dry,enderbitic to charnoenderbitic ganulite depleted in incompatible components,and will only yield further melt above 1000–1050℃,when rapidly increasing fractions of increasingly calcic(granodioritic to tonalitic)melts are formed.The solid residue after melt extraction is incapable of producing syenogranitic magmas similar to the Mid-Proterozoic,A-type rapakivi granites on further heating.The granitic fraction of the syenogranitic rapakivi complexes must thus have been formed by a different chain of processes,involving mantle-derived mafic melts and melts from crustal rock types not conditioned by the preceding late-orogenic Svecofennian anatexis. 展开更多
关键词 LEUCOGRANITE rapakivi granite ANATEXIS restite depleted granulite FINLAND
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