论文部分内容阅读
本文根据我国调查成果和充分利用DSDP资料,通过综合研究分析认为:麦哲伦成矿区,实际上是一条呈北西方向展布的、规模宏大的海山链。该海山链包含十多座海山,每座海山均属平顶山类型。几乎每座海山都具有从山顶往下,由平坦→陡峭→缓坡变化的规律。即山顶平坦,海山上、中部山坡陡峭,海山中、下部山坡变缓。依据海山形态和其坡度的变化特点,每座海山可划分出台地、陡坡带和缓坡带等三个地貌单元,根据区域地层和海洋磁异常条带(M_(25)M_(38))展布特征综合分析,推断麦哲伦海山链所在的位置,原来是一条规模宏大的、走向北西的转换断层。该断层控制着麦哲伦海山链富钴结壳的成矿作用。
Based on the survey results in our country and taking full advantage of the DSDP data, this paper argues that the Magellan metallogenic region is actually a large seamount chain distributed in the northwest direction. The seamount chain contains more than a dozen seamounts, each seamount is a Pingdingshan type. Almost every seamount has a pattern that changes from flat to steep → gentle slope down from the top of the mountain. Namely flat top, seamounts, the central slopes steep, seamounts, lower slopes slowed. According to the characteristics of seamounts and their gradient, each seamount can be divided into three geomorphic units: steep slope and gentle slope. According to the regional stratigraphy and marine magnetic anomaly (M_ (25) M_ (38)), Comprehensive analysis of features, infer the location of the Magellan seamounts chain turned out to be a large scale, to the northwest transition fault. The fault controls the mineralization of cobalt-rich crusts in the Magellan seamounts.