Over 800 paleomagnetic samples were collected from 79 sample localities, ranging inage from Devonian, Carboniferous, Permian to Jurassic for palcolatitude research on theGulzhou terrain. The area sampled covers 13 cou...Over 800 paleomagnetic samples were collected from 79 sample localities, ranging inage from Devonian, Carboniferous, Permian to Jurassic for palcolatitude research on theGulzhou terrain. The area sampled covers 13 counties with an area of about 50000 km2. Thepaleomagnetic results obtainal indicate that the Guizhou was at 11. 4°S in Devonian, 4. 5° -9. 3°S in Carboniferous, 2. 6°- 4. 5°S in Permian, 14. 8°N in Triassic and 24. 5°- 26. 0°N inJurassic. In the Cretaceous period, the paleo-latitude of the area was at 22. 4 - 23. 6°N.Therefore, a variation curve of paleo-latitude is established in this paper for the Guizhou terrainfrom Late Devonian to Late Cretaceous time.展开更多
In view of the huge ice cover of 24. 5× 106 km3 in Antarctica, which accounts for over 90 % by volume of the ice body on earth, the movement of Antarctic glaciers is a major control on global sea-level change and...In view of the huge ice cover of 24. 5× 106 km3 in Antarctica, which accounts for over 90 % by volume of the ice body on earth, the movement of Antarctic glaciers is a major control on global sea-level change and climatic fluctuation. As recorded in the Quaternary deposits in King George Island, West Antarctica, three rapid ablations can be recognized at 11000, 9000 and 6100 years ago and the global climate within the past 6000 years is characterized by small-amplitude warm-cold fluctuation. Intertidal deceits at the north bank of the Shenzhen Bay suggest a periodic variation in sea level in about every 670 years over the last 6000 years with low sea levels recorded in the periods of 5500 - 4900, 3900 - 3600, 2400 2200 and 1300 - 1200 years ago. Between these periods the sea level rised for about 80 cm onaverage. The modern warming climate in the last century corresponds with a rise of sea level atthe rate of 2 - 3 mm/a.展开更多
文摘Over 800 paleomagnetic samples were collected from 79 sample localities, ranging inage from Devonian, Carboniferous, Permian to Jurassic for palcolatitude research on theGulzhou terrain. The area sampled covers 13 counties with an area of about 50000 km2. Thepaleomagnetic results obtainal indicate that the Guizhou was at 11. 4°S in Devonian, 4. 5° -9. 3°S in Carboniferous, 2. 6°- 4. 5°S in Permian, 14. 8°N in Triassic and 24. 5°- 26. 0°N inJurassic. In the Cretaceous period, the paleo-latitude of the area was at 22. 4 - 23. 6°N.Therefore, a variation curve of paleo-latitude is established in this paper for the Guizhou terrainfrom Late Devonian to Late Cretaceous time.
文摘In view of the huge ice cover of 24. 5× 106 km3 in Antarctica, which accounts for over 90 % by volume of the ice body on earth, the movement of Antarctic glaciers is a major control on global sea-level change and climatic fluctuation. As recorded in the Quaternary deposits in King George Island, West Antarctica, three rapid ablations can be recognized at 11000, 9000 and 6100 years ago and the global climate within the past 6000 years is characterized by small-amplitude warm-cold fluctuation. Intertidal deceits at the north bank of the Shenzhen Bay suggest a periodic variation in sea level in about every 670 years over the last 6000 years with low sea levels recorded in the periods of 5500 - 4900, 3900 - 3600, 2400 2200 and 1300 - 1200 years ago. Between these periods the sea level rised for about 80 cm onaverage. The modern warming climate in the last century corresponds with a rise of sea level atthe rate of 2 - 3 mm/a.
