SWIR abyssal peridotites EBSD and microprobe datasets

The crystallographic preferred orientation (CPO) of olivine, pyroxenes, spinel, and amphibole was measured in 17 selected samples using a JEOL JSM 5600 at the Geosciences Montpellier EBSD facility, with 17 kV acceleration voltage and 24 mm working distance. For each thin section, CPO maps covered areas of 4 to 13 cm² with a grid step of 15 or 35 µm, depending on olivine minimum grain size. Because of the large size of olivine porphyroclasts in most samples, CPO were measured on several thin sections and then combined. Higher-resolution CPO maps (grid step 0.5 to 10 µm depending on the dominant grain size) of fine-grained zones were also obtained for 7 samples using the CamScan Crystal Probe X500-FEG SEM, also at the Geosciences Montpellier EBSD facility. Post-acquisition treatment consisted in deleting wild spikes and filling non-indexed pixels with ≥ 6 neighbors with coherent orientations with their average orientation. In situ major element concentrations of amphiboles were measured using a Cameca SX-100 electron microprobe (CAMPARIS service, Paris). The accelerating voltage was fixed at 15 kV and beam current at 10 nA. The spot size was 1μm. Counting times were 10 s. Compositions are presented in TableS3.本研究针对17件精选样品中的橄榄石、辉石、尖晶石与角闪石的晶体优选取向（Crystallographic Preferred Orientation，CPO）进行了测量。实验依托蒙彼利埃地球科学学院电子背散射衍射（Electron Backscatter Diffraction，EBSD）实验室完成，采用日本电子JEOL JSM 5600扫描电镜，加速电压设定为17 kV，工作距离为24 mm。针对每件薄片，CPO成像的扫描区域为4至13平方厘米，网格步长设为15或35微米，具体取值依据橄榄石的最小晶粒尺寸确定。鉴于多数样品中橄榄石残斑晶尺寸较大，因此我们对多块薄片分别开展CPO测量后再进行拼接整合。针对7件样品的细晶区域，我们还采用CamScan Crystal Probe X500-FEG场发射扫描电镜（Field Emission Gun Scanning Electron Microscope，FEG SEM）获取了更高分辨率的CPO成像图，其网格步长为0.5至10微米，具体取值依据主导晶粒尺寸确定，实验同样在蒙彼利埃地球科学学院的EBSD实验室完成。采集后处理流程包括两步：首先剔除野值尖峰，其次对未标定像素进行填充——当未标定像素拥有至少6个相邻像素且其取向与邻域平均取向一致时，将其补全为对应取向。角闪石的原位主量元素浓度采用卡美卡Cameca SX-100电子探针微区分析仪进行测量，实验依托巴黎CAMPARIS测试服务平台完成。实验参数设置如下：加速电压为15 kV，束流为10 nA，束斑尺寸为1微米，计数时长为10秒。相关成分数据详见表S3（TableS3）。