COLLABORATIVE RESEARCH: High-resolution, multi-proxy Miocene-Pleistocene climate and environmental record from the high-elevation Zhada basin, SW Tibetan Plateau

合作研究：青藏高原西南部高海拔扎达盆地高分辨率、多代理中新世-更新世气候和环境记录

• 批准号: 1226984
• 负责人: Timothy Shanahan
• 金额: $ 14.42万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-10-01 至 2016-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1226984&HistoricalAwards=false
• 关键词: COLLABORATIVE; RESEARCH; resolution; multi; proxy

COLLABORATIVE RESEARCH: High-resolution, multi-proxy Miocene-Pleistocene climate and environmental record from the high-elevation Zhada basin, SW Tibetan PlateauByTimothy Shanahan, EAR-1226984, Univ. Texas AustinXiaoming Wang, EAR-1227212, Los Angeles County Museum of Natural HistoryABSTRACTThe proposed work will investigate the causes and effects of environmental change in the southern Tibetan Plateau. The Tibetan Plateau figures prominently in models of Cenozoic tectonic, faunal, environmental, and paleoclimate evolution. However, despite extensive research into these topics on the margins of the Tibetan Plateau, little research has focused on the record of environmental change on the plateau itself, and existing data from the plateau is complex and appears contradictory. The extensive lacustrine deposits of high elevation paleolake Zhada in the Zhada Basin of southwestern Tibet contain abundant vertebrate, invertebrate, and plant fossils and preserves a valuable record of environmental change and vertebrate evolution spanning the last 9 Ma. The proposed work seeks to use a combination of carbonate stable isotopes (e.g., d18O, d13C, delta47), molecular geochemical and stable isotopic (e.g., MBT/CBT index, d13Cwax) approaches to reconstruct the history of past climate and environmental changes on the plateau from the Zhada Basin sediments and to link these to the changes in the fossil record. Together, these data will provide the most complete record of environmental and faunal change over this crucial period of time available for this region.

合作研究：青藏高原西南部高海拔札达盆地中新世-更新世高分辨率多代用指标气候和环境记录作者：Timothy Shanahan，J-1226984，德克萨斯大学奥斯汀分校王晓明，J-1227212，洛杉矶县自然历史博物馆摘要这项工作将调查青藏高原南部环境变化的原因和影响。 青藏高原在新生代构造、动物群、环境和古气候演化模式中占有重要地位。 然而，尽管对青藏高原边缘的这些主题进行了广泛的研究，但很少有研究集中在高原本身的环境变化记录上，而且来自高原的现有数据很复杂，似乎相互矛盾。 西藏西南部扎达盆地高海拔古湖泊扎达湖广泛的湖泊沉积中含有丰富的脊椎动物、无脊椎动物和植物化石，保存了9 Ma以来环境变化和脊椎动物演化的宝贵记录。 所提出的工作试图使用碳酸盐稳定同位素的组合（例如，d18 O，d13 C，δ 47），分子地球化学和稳定同位素（例如，MBT/CBT指数（d13 Cwax）方法重建了扎达盆地沉积物中过去气候和环境变化的历史，并将这些变化与化石记录中的变化联系起来。 这些数据将共同提供该区域在这一关键时期内环境和动物变化的最完整记录。