OSG Logging Data - Lake Junín Drilling Project, Perú - 22-JUL-18-AUG-2015

The Lake Junín Drilling Project, co-funded by the International Continental Scientific Drilling Program, ICDP, aims to provide a continuous paleoclimate record from lacustrine sediments, and to reconstruct the history of the continental records covering the glacial-interglacial cycles spanning more than 500 kyr. Lake Junín, also known as Chinchaycocha, is a shallow (maximum water depth of 12 m), inter-mountain high-elevation (at 4100 m a.s.l.) lake in the inner-tropics of the Southern Hemisphere that spans 300 km2 in the tropical Andes of Peru. Drill cores were recovered during summer 2015 from three drill sites on the lake. After the completion of coring operations in each hole, downhole logging measurements were performed in five of the 11 boreholes (1A, 1C, 1D, 2A and 3B) by the Operational Support Group of ICDP at GFZ Potsdam (OSG). The OSG logging data from Lake Junín Drilling Project is given here in three data formats. For each of the five boreholes all processed logging data are comprised in one composite logging data set, this set is given here both in ASCII text and in WellCAD format. Additionally, the raw sonic waveform data are in LIS format: • Composite logging data in ASCII text files (.txt) • Composite logging data in WellCAD format (.wcl) • Sonic raw data (waveforms) in LIS format (.lis) Detailed description is provided in the associated data description file.

胡宁湖钻探项目（Lake Junín Drilling Project）由国际大陆科学钻探计划（International Continental Scientific Drilling Program, ICDP）联合资助，旨在获取湖相沉积物的连续古气候记录，重建覆盖逾50万年冰期-间冰期旋回的大陆气候演化历史。
胡宁湖又名钦查约查湖（Chinchaycocha），地处秘鲁热带安第斯山脉的南半球内热带区域，是一处山间高海拔浅水湖泊，海拔4100米，最大水深12米，水域面积达300平方千米。
2015年夏季，项目团队在该湖的3个钻探点位获取了岩心。每孔取芯作业完成后，位于德国波茨坦GFZ的国际大陆科学钻探计划运维支持小组（OSG）对11个钻孔中的5个（编号1A、1C、1D、2A和3B）开展了井下测井测量。
本数据集提供胡宁湖钻探项目的OSG测井数据，共包含三种数据格式。针对上述5个钻孔，所有经过处理的测井数据均整合为一套综合测井数据集，该数据集同时以ASCII文本格式与WellCAD格式发布。此外，原始声波波形数据采用LIS格式存储：
• ASCII文本文件格式的综合测井数据（文件扩展名为.txt）
• WellCAD格式的综合测井数据（文件扩展名为.wcl）
• LIS格式的原始声波波形数据（文件扩展名为.lis）
详细的数据说明请参阅配套的数据描述文件。