Stratigraphy, Paleontology, Structural Geology and Paleoglaciology of the Lake Neogene Glacigene Sirius Group of the Dominion Range-Beardmore Glacier Region

该奖项支持对横贯南极山脉的晚上新世-早更新世陆生冰川天狼星群的继续研究。该项目包括在1990-91年的南方季节，在多明尼姆山脉-比尔德莫尔冰川地区进行为期六周的实地考察，然后进行实验室数据整理。野外和实验室研究的主要目标是：(1)前天狼星时期的古地形和构造地质；(2)剖面测量、横向和纵向相变化；(3)间冰期山毛榉林（Nothofagus）和其他大、微植物材料的收集；(4)在细粒湖相中寻找昆虫、甲壳类、双壳类和鱼类化石；(5)进一步收集天狼星群的基质和微碎屑样品，以扩大东南极洲内陆盆地晚上新世-早更新世白垩系-古近系-新近系微化石的收集范围；(6)继续验证这样的假设，即南极洲这部分地区的上新世冰期涉及相对较小的冰盖的高频变化、持续温暖期的间冰期的发展，以及与海平面升高有关的海侵对南极内部的主要海洋入侵。

This award supports continuing study of the late Pliocene- early Pleistocene terrestrial glacigene Sirius Group of the Transantarctic Mountains. The program consists of a six week field season in the Dominion Range-Beardmore Glacier region in the 1990-91 austral season, followed by laboratory data reduction. The following are among the principal targets to be addressed during the field and laboratory studies: (1) pre- Sirius paleotopography and structural geology; (2) section measurement, lateral and vertical facies changes; (3) collection of interglacial beech forest (Nothofagus) and other macro-and microplant material; (4) search for fossil insect, crustacean, bivalve, and fish material in the finer-grained lacustrine facies; (5) collect additional matrix and microclast samples from the Sirius Group with the aim of expanding the collection of Cretaceous-Paleogene-Neogene microfossils which were transported from the interior basins of East Antarctica during the late Plicoene-early Pleistocene; and (6) continue to test the hypothesis that Pliocene glaciation in this part of Antarctica involved high frequency variations of relatively small ice sheets, the development of interglacials of protracted warm periods, and major marine invasions of the antarctic interior by transgressions associated with higher stands of sea level.