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位于南沙海区的１７９６２柱状样提供了约 ３０ ｋａ以来的沉积记录．从中提取的反映火灾历史的黑碳数据揭示出在冰期，特别是在 １８ ｋａＢＰ前后的盛冰期，黑碳含量和堆积速率波动较大，而全新世则相对稳定得多．黑碳稳定同位素组成表明，从冰期到全新世，其燃烧的前身物主要是以Ｃ４植物为主的草本植物．南海南部周围地区以草本植物为主的亚高山、高山植被带是可能的黑碳来源区．冰期与全新世该地区垂直植被带的变化导致了黑碳沉积特点的变化．
The 17962 column in the Nansha sea area provides sedimentary records for about 30 ka. The black-carbon data extracted from the survey reflecting the history of the fire revealed that during the glacial period, especially during the ice age around 18 kaBP, the black carbon content and accumulation rate fluctuated significantly, whereas the Holocene was relatively stable. The stable carbon isotope composition of black carbon shows that from the glacial to the Holocene, the former precursors of burning are mainly herbaceous plants based on C4 plants. Sub-alpine and alpine vegetation belt dominated by herbs in the southern part of South China Sea is a possible source of black carbon. Changes in vertical vegetation zones in the area during the Ice Age and Holocene resulted in changes in the characteristics of black carbon deposition.