Gravity Study of the Rennick Graben and the Campbell Block in Northern Victoria Land, and the Relation of the Rennick Structure to Rifting Processes in the Ross Sea

北方维多利亚土地提供了最广泛的横截面的 横贯南极山脉，一个主要的山脉， 东南极洲和西南极洲，似乎是通过延伸产生的 和裂谷肩隆起而不是挤压。 一个重要 北方维多利亚地的Rennick地堑构造 可能是罗斯海恐怖裂谷的延伸 几乎 这一重要区域没有陆基地球物理数据。 这项调查将获得和解释重力数据， Rennick地堑构造和坎贝尔地块， 一块完整的大陆地壳， 恐怖裂谷的建筑 这项工作的目标是 通过重量分析确定Rennick结构，以追踪 向南穿过坎贝尔街区，向恐怖区进发 裂谷的均衡补偿机制 Rennick结构 这将是一个合作项目， Bundesanstalt fur Geowissenschaften，联邦共和国德国， 这将在德国的军事行动中为这项工作提供后勤保障， 南极北方维多利亚陆地考察（GANOVEX V） 1988 - 1989赛季。 主要研究者已 作为受邀的美国参与者， 重力数据将与其他数据相结合。 地质、构造、磁力和地震折射研究 GANOVEX V探险队在更大的Transanaerobic方面 山脉问题和地幔异常的性质 是横贯南极裂谷系的根本原因

Northern Victoria Land offers the widest cross section of the Transantarctic Mountains, a major mountain range that separates East and West Antarctica and appears to be produced by extension and rift shoulder uplift rather than by compression. An important graben structure, the Rennick Graben, in Northern Victoria land may be an extension of the Terror Rift in the Ross Sea. Virtually no land-based geophysical data exist for this important region. This investigation will acquire and interpret gravity data over the Rennick Graben structure and the Campbell Block, an apparently unbroken piece of continental crust that separates the Rennick structure from the Terror Rift. The goals of this work are to define the Rennick structure gravimetrically, to trace the structure southward across the Campbell Block toward the Terror Rift, and to study the isostatic compensation mechanism for the Rennick structure. This will be a cooperative project with the Bundesanstalt fur Geowissenschaften, Federal Republic of Germany, which will provide the logistics for this work during the German Antarctic Northern Victoria Land Expedition (GANOVEX V) in the 1988/1989 field season. The Principal Investigator has been invited to lead the gravity study as an invited U.S. participant of GANOVEX V. The gravity data would be integrated with other geological, structural, magnetic and seismic refraction studies of the GANOVEX V expedition in terms of the larger Transantarctic Mountain problem and the nature of the mantle anomaly that might be the underlying cause of the Transantarctic Rift System.