重力测量在老挝万象盆地固体钾盐矿勘查中的有效性分析
The effectiveness of gravimetric analysis about solid potash ore exploration in the vientiane basin of Laos
投稿时间:2016-04-05  修订日期:2016-05-10
DOI:
中文关键词:  固体钾盐  重力测量  载荷差异  塑性流动  万象盆地
英文关键词:solid potash  gravity measurement  load difference  plastic flow  Vientiane basin
基金项目:
作者单位邮编
段建华 青海省核工业地质局 810008
路耀祖* 青海省核工业地质局 810008
李彦强 青海省核工业地质局 
徐新文 青海省核工业地质局 
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中文摘要:
      老挝万象盆地钾盐矿赋矿地层为古近系古新统塔贡组下岩段下岩段,为隐伏矿层,分布面积广,厚度大,品位高。由于受钾盐矿层沉积基底地形差异及矿层的后期改造,钾盐矿层局部缺失。为了在钻探揭露控制矿层前,预测矿体的赋存位置,有效节约探矿成本。根据万象盆地古近系古新统塔贡组石盐岩、钾镁岩矿与泥岩之间存在密度差,认为重力测量能够有效区分盐类矿层的埋深、厚度,而钾盐矿层往往赋存于古近系古新统塔贡组巨厚层石盐矿层上部,重力负异常与钾盐矿层相对应性好,是钻探验证首选区域,是万象盆地钾盐矿勘查较为有效的物探方法。
英文摘要:
      Potash mine ore rock in Vientiane Basin is the next section of rock under paragraph Paleogene Paleocene Tagong group,belonging concealed seam,wide distribution, big thickness, high grade.Due to the late reformation potash seam and seam deposition substrate topography difference of potash seam locally deleted.Before drilling disclosure controls seam, in order to predict the occurrence location of the ore body, effectively saving prospecting costs.According Vientiane Basin Paleogene Paleocene Tagong rock group rock salt, potassium and magnesium between rock and mudstone density difference that the gravity measurements can distinguish salt seam of depth, thickness, and potash seam often occurs in Paleogene Paleocene Tagong set an upper thick layer of rock salt layer, negative gravity anomalies and potash seam corresponding to good, it is drilling to verify the preferred region, the Vientiane Basin potash mine exploration geophysical methods more effective.
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