Glacial Geology and Petrography of Erratics in the Shackleton Range, Antarctica
Glacial Geology and Petrography of Erratics in the Shackleton Range, Antarctica
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南极洲沙克尔顿山脉的冰川地质学和不稳定岩石学
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
W. Buggisch
中科院分区：
文献类型：
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作者：
H. Höfle;W. Buggisch
1987/88年德国地质考察队GEISHA对沙克尔顿山脉的冰川地质和物源不稳定进行了研究，特别是对沙克尔顿山脉的南部和西北部进行了研究。整个沙克尔顿山脉曾经由南至东南方向被冰覆盖的证据，是由冰下侵蚀形成的（如条状、新月形沟槽、岩状山）和不稳定形成的，这些不稳定可能起源于该山脉南部的which way Nunataks地区和Pensacola山脉。这很可能发生在南极冰盖最后一次大扩张期间，根据来自南极大陆其他地区的证据，这次大扩张发生在中新世末期。在该范围的西北部绘制了一幅图，并绘制了一幅图。这些沉积物沉积于威奇塞利亚（威斯康辛）冰期的Slessor冰川01′扩张01′期。这种扩张是由于更新世期间海平面下降导致的菲利纳冰架扩大造成的冰川堵塞造成的，威德尔海和罗斯海沿岸的地质鲟鱼就证明了这一点。对冰川边缘的不稳定现象的研究提供了关于冰川隐藏的岩石的信息。
Studies wcre made 01' the glacial geology and provenance 01' erratics in thc Shackleton Range during the German geologieal expedition GEISHA in 1987/88, especially in the southern and northwestern parts 01' the range. Evidence that the entire Shackleton Range was once overrun by ice from a southerly to southeasterly direction was provided by subglacial erosional forrns (e.g. striations, cresccntic gouges, roches moutonnees) and erratics which probably orriginatcd in the region 01' the Whichaway Nunataks ancl the Pensacola Mountains in the southern part 01' the range. This probably happened during the last major expansion 01' the Anarctic polar ice sheer, which, on the basis 01' evidence from other parts 01' thc continem, oceurred towards the end 01' the Miocene. Till and an area 01' sennered erratics were mapped in the northwestern part 01' the range. These were deposited during aperiod 01' expansion 01' the Slessor Glacier in the Weichselian (Wisconsian) glacial stage earlier. This expansion was caused by bloekage 01' the glacier by an cxpanded Fileliner iee shelf which resulted from the sinking ofthe sea level during the Pleistocene, as demonstrated by geologieal sturlies in the Weddell Sea and along the coast 01' the Ross Sea. Studies 01' the erratics at thc edges 01' glaciers provided information abour rock concealed by the glacier.