Chemical composition of a manganese nodule from the Blake Plateau, Atlantic Ocean

The area surveyed during project AMC-11-67 was the portion of the Blake Plateau between latitude 30°00'N and 33°00'N and between the 100 to 1000 fathom curves. The survey was conducted from 3 October until 18 October 1967. Survey operations included dredgings, camera and multi-sensor lowerings. A collection of manganese and phosphate concretions as well as coral and sediment samples were examined by the ESSA(NOAA) Atlantic Oceanographic Laboratories. Chemical analyses were conducted at the NASA Manned Spacecraft Center, Houston by Richard A. Laidley for X-Ray Fluorescence Analysis and H. Costello for Atomic Absorption Analysis. Later the whole collection of samples was transferred to the Smithsonian National Museum of Natural History were it is available for study (see, http://mineralsciences.si.edu/collections.htm).项目AMC-11-67的勘测区域为布莱克高原（Blake Plateau）上北纬30°00'至33°00'、介于100至1000英寻等深线之间的海域。本次勘测于1967年10月3日至10月18日实施，作业内容包括拖网采样、水下摄像与多传感器下放探测。所采集的锰质结核、磷质结核以及珊瑚与沉积物样本，由环境科学服务局（ESSA，现为美国国家海洋和大气管理局，NOAA）大西洋海洋学实验室完成检验。后续化学分析工作由休斯顿NASA载人航天中心的Richard A. Laidley负责X射线荧光分析（X-Ray Fluorescence Analysis），H. Costello负责原子吸收光谱分析（Atomic Absorption Analysis）。全部样本集合后续被移交至史密森尼国家自然历史博物馆（Smithsonian National Museum of Natural History），可供研究人员使用（详见：http://mineralsciences.si.edu/collections.htm）。