Chemical and mineral compositions of basalts from the Pacific Ocean, DSDP data

Mineral and chemical alterations of basalts were studied in the upper part of the ocean crust using data of deep-sea drilling from D/S Glomar Challenger in the main structures of the Pacific floor. Extraction of majority of chemical elements (including heavy metals) from basalts results mainly from their interaction with heated sea water. As a result mineralized hydrothermal solutions are formed. On entering the ocean they influence greatly on ocean sedimentation and ore formation.

本研究依托“格洛玛·挑战者”号（D/S Glomar Challenger）的深海钻探数据，针对太平洋洋底主要构造带内的大洋地壳上层开展分析，对玄武岩的矿物与化学蚀变特征进行了研究。玄武岩内绝大多数化学元素（含重金属）的溶出过程，主要由其与受热海水的相互作用所主导，进而形成矿化热液溶液。此类矿化热液溶液进入大洋后，会对海洋沉积作用与成矿过程产生显著影响。