JOGMECCRFC12018 Env Template HK17 NEMA

Sampling data captured in Oceanic Exploration Research JOGMEC has implemented the following work as crust exploration activities during 2018: (1) Exploration work During 2018, two surveys were conducted on the R/V Hakurei in the exploration area. Multi Beam Echo Sounder (MBES) acoustic survey, Benthic Multi-coring System (BMS) drilling, Arm-bolted Rock Dredge (AD) rock sampling were carried out for resource evaluation. The first survey targeted the JA04 Seamount, JA06 Seamount (aka the Xufu Guyot), the JA12 Seamount (aka the Zhinyu Guyot) and the JA17 Seamount (aka the Scripps Guyot). The period of the first survey was from 5 April to 5 May (31 days). The second survey targeted the JA02 Seamount (aka the Lamont Guyot), the JA04 Seamount and the JA06 Seamount. The period of second survey was from 11 May to 11 June (32 days). High-resolution bathymetry data of the JA04 and JA12 Seamounts, 84 drilling cores in 31 blocks and 394 kg of rock samples were acquired during the exploration survey in 2018. Chemical analysis for resource evaluation and lithofacies similarity analysis to compare characteristics of crust ores were carried out on drilling core samples. Moreover, statistical analysis between acoustic backscattering strength and seafloor observation was carried out to evaluate the distribution of crust ores on seamounts in the exploration area.

本数据集为海洋勘探研究采集的采样数据，日本石油天然气金属矿产资源机构（JOGMEC）于2018年开展了如下地壳勘探相关工作：
(1) 勘探工作
2018年，勘探作业区内依托“白岭号”调查船（R/V Hakurei）完成了两次科考调查。本次调查以资源评估为目标，开展了多波束测深声呐（Multi Beam Echo Sounder, MBES）声学探测、底栖多管取样器（Benthic Multi-coring System, BMS）钻探作业，以及锚定挖岩器（Arm-bolted Rock Dredge, AD）岩石采样工作。
首次调查的作业区域涵盖JA04海山、JA06海山（又名徐府平顶海山）、JA12海山（又名珍钰平顶海山）以及JA17海山（又名斯克里普斯平顶海山），调查周期为4月5日至5月5日，共计31天。
第二次调查的作业区域涵盖JA02海山（又名拉蒙特平顶海山）、JA04海山与JA06海山，调查周期为5月11日至6月11日，共计32天。
2018年本次勘探调查共获取JA04与JA12海山的高分辨率水深地形数据、31个区块内的84个钻探岩芯，以及394千克岩石样品。科研人员针对钻探岩芯样品开展了资源评估相关的化学分析，以及用于对比地壳矿石特征的岩相相似性分析。此外，还开展了声学反向散射强度与海底观测数据间的统计分析，以评估勘探作业区内海山的地壳矿石分布情况。