Growth rates and possible age of a North Pacific manganese nodule

The rate of accumulation of a ferromanganese coating on a fragment of pillow basalt was estimated using a variety of techniques. Unsupported 230 Th activity decrease in the...本研究采用多种技术手段，对一块枕状玄武岩（pillow basalt）碎片表面的铁锰涂层（ferromanganese coating）的沉积速率进行了估算。针对其中的无载体钍-230（unsupported ²³⁰Th）的活度衰减展开了……