Based on its microstructure, Co-rich crust A1-1 from seamount Allison, central Pacific, was scraped at averaged interval of 1.3 mm to measure osmium isotopic composition, and subsequently to establish the 187Os/188Os ...Based on its microstructure, Co-rich crust A1-1 from seamount Allison, central Pacific, was scraped at averaged interval of 1.3 mm to measure osmium isotopic composition, and subsequently to establish the 187Os/188Os profile of scraping section of the crust. By observing the variation of 187Os/188Os under 10Be chronology and matching it to the well-known seawater Os isotope evolution of the past 40 Ma, two growth hiatuses (H1 and H2) occurring in the periods respectively between 13.6 and 29.6 Ma and between 8 and 9.8 Ma in the crust were recognized. According to the two hiatuses, the dating scheme for each scraped layer of the crust was suggested. For the upper layers younger than 6.8Ma, their growth ages were calibrated under 10Be chronology; for the lower layers older than 6.8Ma, their growth ages were obtained from 187Os/188Os evaluation curve by linear interpolation. Hereby, the age for the most inner layer of the crust was determined to be 39.5 Ma. H1 and H2 exactly correspond to the boundary between phosphatization and non-phosphatization and volcanic ash layer in the crust, respectively.展开更多
好莱坞从来不缺少怪人(weirdo)和鬼才(wizard)。约翰尼·德普亦是其中一份子。这家伙是《剪刀手爱德华》(Edward Scissorhands)里深情款款的机器人爱德华,是《加勒比海盗》(Pirates of the Caribbean)里神经质的船长杰克,是《浓情...好莱坞从来不缺少怪人(weirdo)和鬼才(wizard)。约翰尼·德普亦是其中一份子。这家伙是《剪刀手爱德华》(Edward Scissorhands)里深情款款的机器人爱德华,是《加勒比海盗》(Pirates of the Caribbean)里神经质的船长杰克,是《浓情巧克力》(Chocolate)中的吉普赛浪子洛克斯。角色的多变依然无法抹去他那个已经根深蒂固的模样:月光一样惨白的皮肤(pale s k i n),黑色眼线,外加一抹烟熏(smoky eyes)。撩人又妖娆。今日,展开更多
基金the Ministry of Science and Technology and the China Oceanic Min-eral Resource Research and Development Association (COMRA) (Grant Nos. 2006DFB21620 and DY105-01-01-09)
文摘Based on its microstructure, Co-rich crust A1-1 from seamount Allison, central Pacific, was scraped at averaged interval of 1.3 mm to measure osmium isotopic composition, and subsequently to establish the 187Os/188Os profile of scraping section of the crust. By observing the variation of 187Os/188Os under 10Be chronology and matching it to the well-known seawater Os isotope evolution of the past 40 Ma, two growth hiatuses (H1 and H2) occurring in the periods respectively between 13.6 and 29.6 Ma and between 8 and 9.8 Ma in the crust were recognized. According to the two hiatuses, the dating scheme for each scraped layer of the crust was suggested. For the upper layers younger than 6.8Ma, their growth ages were calibrated under 10Be chronology; for the lower layers older than 6.8Ma, their growth ages were obtained from 187Os/188Os evaluation curve by linear interpolation. Hereby, the age for the most inner layer of the crust was determined to be 39.5 Ma. H1 and H2 exactly correspond to the boundary between phosphatization and non-phosphatization and volcanic ash layer in the crust, respectively.
文摘好莱坞从来不缺少怪人(weirdo)和鬼才(wizard)。约翰尼·德普亦是其中一份子。这家伙是《剪刀手爱德华》(Edward Scissorhands)里深情款款的机器人爱德华,是《加勒比海盗》(Pirates of the Caribbean)里神经质的船长杰克,是《浓情巧克力》(Chocolate)中的吉普赛浪子洛克斯。角色的多变依然无法抹去他那个已经根深蒂固的模样:月光一样惨白的皮肤(pale s k i n),黑色眼线,外加一抹烟熏(smoky eyes)。撩人又妖娆。今日,
