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

维多利亚州北部伦尼克地堑和坎贝尔地块的重力研究，以及伦尼克结构与罗斯海裂谷过程的关系

基本信息

批准号：
8720654
负责人：
Juergen Kienle
金额：
$ 12.98万
依托单位：
University of Alaska Fairbanks Campus
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1988
资助国家：
美国
起止时间：
1988-07-01 至 1990-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=8720654&HistoricalAwards=false
关键词：
Gravity Study Rennick Graben Campbell

项目摘要

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.

维多利亚州北部提供了跨北极山脉的最宽的横截面，这是一个主要的山脉，将东和西部分开，似乎是通过延伸和裂谷肩部升高而不是通过压缩产生的。在维多利亚州北部土地上，雷尼克·格拉登（Rennick Graben）是一个重要的抢夺结构，可能是罗斯海恐怖裂谷的延伸。对于这个重要区域，几乎没有陆基地球物理数据。这项调查将获取和解释Rennick Graben结构和Campbell Block的重力数据，Campbell Block显然是不间断的大陆壳，将Rennick的结构与恐怖裂谷分开。这项工作的目标是通过重量法规定义Rennick结构，以向南沿坎贝尔街区向南迈出恐怖裂痕的结构，并研究Rennick结构的等静力补偿机制。这将是与德国联邦共和国联邦共和国联邦政府联邦政府联邦政府联邦政府的合作项目，该项目将在1988/1989野外赛季期间为这项工作提供这项工作的后勤工作。作为Ganovex V的美国参与者，主要研究者已被邀请领导重力研究。重力数据将与Ganovex V远征的其他地质，结构，磁性和地震折射研究集成，以较大的跨界山区问题和地幔性质的性质，可能会导致跨境的跨性质造成跨性别的原因。