Description and chemical composition of manganese nodules in a core located i...

Three nodules from a core taken north of Puerto Rico are composed chiefly of an x-ray amorphous, hydrated, iron-manganese oxide, with secondary goethite, and minor detrital...采自波多黎各以北海域的一处岩心（core）中的三块结核，主要由一种X射线无定形（X-ray amorphous）水合铁锰氧化物构成，伴生有次生针铁矿（goethite），并含有少量碎屑组分……