摘要
根据藏北伦坡拉盆地遥感影像特征和化探-植物灰分-地物短波红外细分光谱实验结果研究表明,遥感解译的环形影像异常内,吸附烃丙烷、重烃和蚀变碳酸盐(AC)异常叠合分布走向相一致.植物灰分异常及细分光谱曲线中双尖峰异常与油气化探相关,且主要反映重烃的异常分布特征.偏重校正后的甲烷碳同位素值为-41.981‰,结合干燥系数0.84,表明本区土壤吸附气中甲烷属于原油伴生热解气特征.
Based on the interpretation of remote sensing image features,data from geochemical exploration,plant ash content,test on geobody short wave infrared spectrum in Lunpola Basin in north- ern Xizang,the adsorbed propane,heavy hydrocarbon and AC anomaly are over lappingly distributed in the anomaly interpreted on the remote sensing images.Their trends are consistent.Ash-content anoma- ly and double peak anomaly on the spectrum curve which are related to hydrocarbon geochemical exploration,reflect mainly the characteristics of heavy hydrocarbon anomaly.The carbon isotope value in methane is-41.981‰ after bias correction,and the dry coefficient is 0.84.All of these indicate that the adsorbed methane in soil of this area belongs to the category of thermal decomposed gas from crude oil.
出处
《地球科学（中国地质大学学报）》
EI
CSCD
北大核心
1996年第2期215-220,共6页
Earth Science-Journal of China University of Geosciences
基金
国家"八五"西藏地勘专项科研成果.
关键词
植物灰分
油气藏
遥感
红外光谱
地球化学勘探
remote sensing image
anomaly
hydrocarbon geochemical exploration
plant ash content
double peak anomaly
Lunpola Basin.
