(Table T1) Mineralogy and geochemistry of ODP Hole 192-1183A and Hole 192-1186A sediments, Ontong Java Plateau

Boron, Ca, Na, and Gd concentrations and H intensity in sediments obtained during Ocean Drilling Program Leg 192 were determined by prompt gamma neutron activation analysis. The results show strong positive correlation between B content and H intensity in carbonate samples; chalk samples have higher B contents than limestone samples. Average B content is 9.1 ppm for the chalk and 5.2 ppm for the limestone. When chert blocks or clay minerals are present in the carbonate samples, B content increases (up to 91 ppm).

本研究对大洋钻探计划（Ocean Drilling Program）第192航次采集的沉积物中的硼、钙、钠、钆浓度以及氢强度，采用瞬发γ中子活化分析（prompt gamma neutron activation analysis）进行了测定。结果表明，碳酸盐样品中的硼含量与氢强度呈现显著正相关；白垩样品的硼含量高于灰岩样品。白垩样品的平均硼含量为9.1 ppm，灰岩样品的平均硼含量为5.2 ppm。当碳酸盐样品中存在燧石块体或黏土矿物时，硼含量会升高，最高可达91 ppm。