北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2019.2541(06)

K. Piepjohn, W. Dallmann, S. Elvevold

引用次数: 2

Age, geochemistry, and significance of Devonian felsic magmatism in the North Slope subterrane, Yukon, Canadian Arctic 加拿大育空地区北坡地下泥盆纪长英质岩浆活动的时代、地球化学及其意义

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2018.2541(25)

W. Ward, J. Strauss, Benjamin G. Johnson, W. McClelland, M. Colpron, W. Gosen, K. Piepjohn, M. Coble, P. Crockford, J. Landis

引用次数: 10

Numerical basin modeling of the Laptev Sea Rift, NE Russia 俄罗斯东北部拉普捷夫海裂谷数值盆地模拟

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2018.2541(03)

C. Brandes, D. Franke, K. Piepjohn, C. Gaedicke

引用次数: 0

Latest Cretaceous–early Eocene Pacific-Arctic?-Atlantic connection: Co-evolution of strike-slip fault systems, oroclines, and transverse fold-and-thrust belts in the northwestern North American Cordillera 晚白垩纪-始新世早期太平洋-北极?-大西洋连接:北美科迪勒拉西北部走滑断裂系统、造斜和横向褶皱冲断带的共同演化

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2018.2541(28)

D. Murphy

引用次数: 7

Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene 始新世早期加拿大北极地区(加拿大西北地区Beaufort-Mackenzie)亚热带温暖的证据

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2018.2541(27)

M. Salpin, J. Schnyder, F. Baudin, G. Suan, J. Suc, S. Popescu, S. Fauquette, L. Reinhardt, M. Schmitz, L. Labrousse

{"title":"Evidence for subtropical warmth in the Canadian Arctic (Beaufort-Mackenzie, Northwest Territories, Canada) during the early Eocene","authors":"M. Salpin, J. Schnyder, F. Baudin, G. Suan, J. Suc, S. Popescu, S. Fauquette, L. Reinhardt, M. Schmitz, L. Labrousse","doi":"10.1130/2018.2541(27)","DOIUrl":"https://doi.org/10.1130/2018.2541(27)","url":null,"abstract":"During the Paleocene–Eocene, the Earth experienced the warmest conditions of the Cenozoic and reduced equator-to-pole temperature gradients. Compared to low- and mid-latitude sites, Paleogene environmental changes are less documented in Arctic regions, although such high latitude areas constitute a critical domain to constrain global climate changes. Floral and faunal assemblages indicative of exceptionally warm and humid conditions during the late Paleocene–early Eocene have been reported in several localities around the Arctic Ocean. Additional studies are required to ascertain the effects of Paleocene–Eocene global environmental changes on western Arctic regions. Here we present multiproxy data from early Eocene deltaic plain sediments of the Mackenzie Delta (Canada). This environment is characterized by littoral forest, including swamp, showing that the mangrove Avicennia grew in Arctic Canada near 75°N under air temperatures averaging 21–22 °C annually and 10–14 °C in winter and with precipitation of 1200–1400 mm/yr. Kaolinite contents are high (up to 75% of clay assemblages), as under a modern subtropical climate. The Avicennia pollens recently found in the New Siberian Islands and in Arctic Canada imply that warm and wet conditions were widespread along the Arctic coast during the early Eocene. It also suggests a marine connection between the Arctic Basin and the mid-latitude oceans. We propose that an oceanic current must have connected the Arctic Basin to the Atlantic and/or Pacific and that an internal current developed in the Arctic Basin since the early Eocene.","PeriodicalId":59518,"journal":{"name":"北冰洋研究","volume":"24 6 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80093568","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}

引用次数: 12

Detrital zircon U-Pb geochronological and Hf isotopic constraints on the geological evolution of North Yukon 碎屑锆石U-Pb年代学和Hf同位素对育空北部地质演化的约束

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/ABS/2017AM-304042

M. Colpron, W. McClelland, J. Strauss

引用次数: 12

Introduction to Circum-Arctic Structural Events: Tectonic Evolution of the Arctic Margins and Trans-Arctic Links with Adjacent Orogens 环北极构造事件导论:北极边缘的构造演化和与邻近造山带的跨北极联系

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/spe541

K. Piepjohn, J. Strauss, L. Reinhardt, W. McClelland

引用次数: 20

Subsidence, rapid inversion, and slow erosion of the Central Tertiary Basin of Svalbard: Evidence from the thermal evolution and basin modeling 斯瓦尔巴中部第三系盆地的沉降、快速反演和缓慢侵蚀:来自热演化和盆地模拟的证据

北冰洋研究 Pub Date : 2019-06-14 DOI: 10.1130/2018.2541(09)

N. Dörr, F. Lisker, M. Jochmann, T. Rainer, A. Schlegel, K. Schubert, C. Spiegel