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| 1 | 柴达木盆地西部第四纪气候变化和流域风化显示文摘长期以来关于构造隆升、气候变化和大陆化学风化的相互关系存在诸多争议。在气候和构造相互作用典型区域建立高精度大陆化学风化序列是解决上述科学问题的有效途径之一。位于青藏高原东北缘长期封闭的柴达木盆地,其独特的位置和连续的沉积使其成为研究构造隆升、气候变化和大陆化学风化的理想场所。本文以柴达木盆地西部千米深钻SG—1钻孔高质量的连续细粒湖相岩芯为研究对象,使用盐类矿物的硫酸根和钾离子含量、碳酸盐锰含量和硅酸盐化学蚀变指数(CIA)和Nd同位素分析,重建该区第四纪以来湖泊流域气候变化过程和硅酸盐化学风化及可能的物源变化。结果表明柴达木盆地西部第四纪以来流域物源相对稳定,流域整体呈现出气候干旱化、流域硅酸盐风化强度减弱、湖水盐度增加和湖面降低的长期一致性演化过程;上述演化进程在2.2Ma到2.0Ma期间短暂加强,在约1.2Ma和约0.6~0.5Ma出现逐步加强趋势。过去60万年,柴达木盆地西部在冰期存在的相对高湖面时期与黄土高原粒度指标反映的冬季风减弱阶段可以很好对比。北大西洋海表温度反映的高纬过程是长时间尺度(〉10 5年)驱动柴达木盆地西部气候变化和流域硅酸盐风化强度变化的主要因素;西伯利亚高压系统和西风系统的“跷跷板关系”可能是冰期一间冰期或者更短尺度影响柴达木盆地西部气候变化的主要因素。 | 杨一博 方小敏 Albert Galy 杨戎生 | 2018 | 第四纪研究2018，38，1： | 5 |
| 2 | Late Pliocene–Quaternary evolution of redox conditions in the western Qaidam paleolake (NE Tibetan Plateau) deduced from Mn geochemistry in the drilling core SG-1显示文摘 | Yibo Yang Xiaomin Fang Erwin Appel Albert Galy Minghui Li Weilin Zhang | 2013 | Quaternary Research2013，，3： | 2 |
| 3 | Quaternary paleolake nutrient evolution and climatic change in the western Qaidam Basin deduced from phosphorus geochemistry record of deep drilling core SG-1显示文摘 | Yibo Yang Xiaomin Fang Albert Galy Erwin Appel Minghui Li | 2013 | Quaternary International2013，，： | 2 |
| 4 | Evaporite minerals and geochemistry of the upper 400<ce:hsp sp='0.25'/>m sediments in a core from the Western Qaidam Basin, Tibet显示文摘 | Minghui Li Xiaomin Fang Chaolu Yi Shaopeng Gao Weilin Zhang Albert Galy | 2009 | Quaternary International2009，，1： | 2 |
| 5 | Weathering processes in the Ganges–Brahmaputra basin and the riverine alkalinity budget显示文摘 | Albert Galy Christian France-Lanord | 1999 | Chemical Geology1999，，1： | 1 |
| 6 | Weathering processes in the Ganges-Brahmaputra basin and theriverine alkalinity budget显示文摘 | Albert Galy Christian France-Lanord | 1999 | Chemical Geology1999，159，： | 1 |
| 7 | Sequestration of carbon as carbonate in the critical zone:insights from the Himalayas and Tibetan Plateau显示文摘The carbon pool stored in soil carbonate is comparable to the soil organic carbon.Therefore,secondary calcite precipitation in supersaturated catchment could be an important,yet poorly constrained,carbon sink within the modern global carbon cycle.The chemical analysis of some dissolved species transported by rivers,such as elevated Sr/Ca and Mg/Ca ratios but also heavy stable Ca isotopic compositions,witness the formation of secondary calcite in rivers draining arid regions.However,in areas affected by active tectonics and rapid physical erosion,co-variations in the fluvial Sr/Ca and Mg/Ca ratios could also be related to incongruent carbonate weathering processes.Here,we present a model to assess the roles played by incongruent carbonate dissolution and secondary calcite precipitation in modern weathering processes.We tested and applied the model to rivers draining the Himalayan–Tibetan region.The results suggest that regional aridity in the drainage basin promotes carbon sequestration as secondary carbonate but that for a given runoff,incongruent dissolution of carbonate possibly related to rapid physical erosion amplifies such sequestration.The isotopic compositions(^(13)C/^(12)C and^(18)O/^(16)O)of detrital carbonate transported by the main rivers in South and South-East Tibet imply that around 1%of the suspended material transported by those rivers corresponds to secondary carbonate and can represent between 5%and 15%of the alkalinity flux.Most of these alkalinity transported as particulate material is,nevertheless related to the weathering of carbonate lithologies and is also subjected to dissolution prior its final storage in sedimentary basins.However,on glacial-interglacial timescale this will amplify the significant role of mountain weathering on climatic variations. | Albert Galy Yibo Yang Xiaomin Fang | 2017 | Acta Geochimica2017，36，3： | 0 |
| 8 | East Asian monsoon intensification promoted weathering of the magnesium-rich southern China upper crust and its global significance显示文摘The Oligocene-Miocene boundary Asian climatic reorganization linked to the northward migration of the East Asian monsoon into subtropical China is a potentially important but poorly constrained atmospheric CO_(2) consumption process.Here,we performed a first-order estimate of the CO_(2) consumption induced by silicate chemical weathering and organic carbon burial in subtropical China related to this climatic reorganization.Our results show that an increase in long-term CO_(2 )consumption by silicate weathering varies from 0.06×10^(12)to 0.87×10^(12)mol yr^(-1)depending on erosion flux reconstructions,with an~50%contribution of Mg-silicate weathering since the late Oligocene.The organic carbon burial flux is approximately 25%of the contemporary CO_(2) consumption by silicate weathering.The results highlight the significant role of weathering of the Mg-rich upper continental crust in East China,which would contribute to the rapid decline in atmospheric CO_(2) during the late Oligocene and the Neogene rise in the seawater Mg content.If this climatic reorganization was mainly induced by the Tibetan Plateau uplift,our study suggests that the growth of the Himalayan-Tibetan Plateau can lead to indirect modification of the global carbon and magnesium cycles by changing the regional hydrological cycle in areas of East Asia that are tectonically less active. | Yibo YANG Albert GALY Xiaomin FANG Christian FRANCE-LANORD Shiming WAN Rongsheng YANG Jian ZHANG Ran ZHANG Song YANG Yunfa MIAO Yudong LIU Chengcheng YE | 2021 | Science China Earth Sciences2021，64，7： | 0 |
| 9 | 东亚季风增强加剧中国南部富Mg上地壳化学风化及其全球意义显示文摘渐新世-中新世之交的亚洲气候重组伴随着东亚季风北向推进到中国亚热带地区是一个重要的大气CO_(2)消耗过程,但是目前对该过程知之甚少.本研究近似计算了这次气候重组通过加强中国亚热带地区硅酸盐化学风化和有机碳埋藏导致的大气CO_(2)消耗.依据侵蚀通量的重建结果,晚渐新世以来硅酸盐风化导致的长期大气CO_(2)消耗为0.06×10^(12)~0.87×10^(12)mol a^(-1),并且其中约50%的贡献来自于Mg硅酸盐风化.有机碳埋藏导致的大气CO_(2)消耗约为同时期硅酸盐风化的25%.本研究强调了中国东部富Mg上部大陆地壳风化对于晚渐新世全球大气CO_(2)含量下降和新近纪海水Mg含量增加的显著影响.如果这次气候转型主要与青藏高原隆升有关,那么本研究揭示了喜马拉雅-青藏高原的生长通过改变构造欠活跃的东亚地区水循环格局间接调控全球碳和镁循环. | 杨一博 Albert GALY 方小敏 Christian FRANCE-LANORD 万世明 杨戎生 张健 张冉 杨松 苗运法 刘玉东 叶程程 | 2021 | 中国科学:地球科学2021，51，8： | 0 |
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