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| 1 | No apparent lock-in depth of the Laschamp geomagnetic excursion: Evidence from the Malan loess显示文摘The first-order chronological framework of the long-term Chinese loess/paleosol sequences was based mainly on magnetostratigraphy. However, there remain arguments on the lock-in ages of the major geomagnetic reversals. This study systematically compared the stratigraphic locations of the Laschamp excursion and Henrich events (H4 at~39 ka and H5 at~48 ka) recorded by the Luochuan loess profile in the central Chinese Loess Plateau. Results show that the Lascchamp excursion is bracketed well by these two cold events, and the corresponding estimated age is between about 41.7-43.7 ka, which is close to the widely accepted age of ~40-41 ka for the excursion.Therefore, our new results do not suggest apparent lock-in effects in the last glacial Malan loess. | ZHU Rixiang1, LIU Qingsong1,2, PAN Yongxin1, DENG Chenglong1, ZHANG Rui1 & WANG Xianfeng3 1. Paleomagnetism and Geochronology Laboratory (SKL of Lithosphere Evolution), Institute of Geology and Geophysics, Chi- nese Academy of Sciences, Beijing 100029, China 2. Institute of Geophysics and Planetary Geophysics, University of California, Santa Cruz, CA 95064, USA 3. Department of Geology and Geophysics, University of Minnesota, Minneapolis, MN 55455, USA | 2006 | Science China Earth Sciences2006，49，9： | 12 |
| 2 | Holocene grassland vegetation, climate and human impact in central eastern Inner Mongolia显示文摘Phytolith and pollen preserved in the Taipusi Banner paleosol profile, central eastern Inner Mongolia, provide evidence of Holocene grassland vegetation, climate and human impact. The combined phytolith and pollen records reveal a major change in vegetation composition about 5000 a BP. Before 5000 a BP, the vegetation was dominated by Aneurolepidium Chinese-Stipa grandis grassland of C4 grasses. After 5000 a BP, C4 grasses rapidly retreated, indicating a shift to colder and more arid conditions. The gradual invasion of Stipa krylovii, Ag-ropyron desertorum, Ephedra, Chenopodiaceae and Caragana reveal the onset of grassland degeneration. Between 10000 and 8720 a BP, the Aneurolepidium Chinese-Stipa grandis grassland included a small proportion of Artemisia shrub and Echionopos type plants, implying a strong winter monsoon and very weak summer monsoon. From 8720 to 7000 a BP, C4 grasses were common, indicating a strengthening of the summer monsoon. Between 7000 and 5000 a BP, the Holocene thermal maximum was evident, with a significant expansion of C4 grasses and the presence of some trees (such as Pinus and Betula, and so on) in or near the study site. From 4200?000 a BP, a sandy grassland of Artemisia and Agropyron desertorum together with Aster-type taxa occurred. Precipitation amelioration took place between 3000 and 2170 a BP, with a rapid development of Echinops type plants and a small expansion of C4 grasses. From 2170 a BP to present, human activities accelerated the process of grassland degeneration. | HUANG Fei1, Kealhofer Lisa2, XIONG Shangfa3 & HUANG Fengbao1 1. Nanjing Institute of Geology and Paleontology,Chinese Academy of Sciences,Nanjing 210008,China 2. Anthropology and Sociology Department,Santa Clara University,CA 95053,USA 3. Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China | 2005 | Science China Earth Sciences2005，48，7： | 8 |
| 3 | Effect of changing intestinal flow rate on a measurement of intestinal perme- ability显示文摘 | FINE K D SANTA ANA CA PORTER J L | 1995 | Gastroenterology1995，108，4： | 1 |
| 4 | Development of a lavage solution associated with minimal water and electrolyte absorption or secretion显示文摘 | Davis GR Santa Ana CA Morawski SG Fordtran JS | 1980 | Gastroenterology1980，78，51： | 1 |
| 5 | Osmotic effects of polyethylene glycol显示文摘 | Emmett M Santa Ana CA | 1988 | Gastroenterology1988，94，： | 1 |
| 6 | Fasciculated intramedullary pinningof metacarpal fractures 显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg Br1996，21，2： | 1 |
| 7 | Gastrointestinal absorption of calcium from milk and calcium salts 显示文摘 | SHEIKH MS SANTA CA NICAR MJ | 1987 | N Eng J Med1987，317，： | 1 |
| 8 | Fasciculated intramedullary pinning of metacarpal fractures 显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg Br1996，21，： | 1 |
| 9 | Gastrointestinal absorption of calcium from milk and calcium salts显示文摘 | Sheikh MS Santa Ana CA Niear MJ | 1987 | New Engl J Med1987，317，9： | 1 |
| 10 | Fasciculated intramedull- ary pinning of metacarpal fractures 显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg Br1996，21，2： | 1 |
| 11 | Osmotic effects of polyethylene glycol 显示文摘 | Scheller LR Emmett M Santa Ana CA | 1998 | Gastroenterology1998，94，： | 1 |
| 12 | Develop-ment of a lavage solution associated with minimal water and electrolyte ab- sorption or secretion 显示文摘 | Divas GR santa Ana CA Marawski SG | 1980 | Gastroenter-ology1980，78，51： | 1 |
| 13 | Fasciculated intramedullary pinningof metacarpal fractures显示文摘 | Manueddu CA Della Santa D | 1996 | JHand Surg (Br)1996，21，： | 1 |
| 14 | Fasciculated intramedullary pinning of metacarpal fractures显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg(Br)1996，21，： | 1 |
| 15 | Fasciculated intramedullary pinning of metacarpal fractures显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg(Br)1996，21，2： | 1 |
| 16 | Osmotic effects of polyethylene glycol 显示文摘 | Schiller LR Emmett M Santa Aria CA | 1988 | Gastroenterology1988，94，： | 1 |
| 17 | Aggressive estrogen - recep- tor -positive breast cancer arising in patients with elevated body mass index 显示文摘 | Santa - Maria CA Yan J Xie XJ | 2015 | International Journal of Clinical Oncology2015，20，2： | 1 |
| 18 | Fasciculated intramedullarypinning of metacarpal fractures 显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg Br1996，21，2： | 1 |
| 19 | Development of a layage solution associated with minimal water and electrolyte absorption or secretion显示文摘 | Santa Ana CA Morawski SG | 1980 | Gastroenterology1980，78，51： | 1 |
| 20 | Fasciculated intramedulla pinning ofmetacarpal fractures显示文摘 | Manueddu CA Della Santa D | 1996 | J Hand Surg( Br)1996，21，： | 1 |
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