摘要
长期对哈密坳陷石炭系是否发育,存在较大的不确定性。通过对哈密坳陷火山岩地球化学特征分析,认为红1井石炭纪火山岩属于亚碱性系列,富钾、亏损Ti、Nb、Ta等高场强元素,即典型的"TNT"负异常,应形成于岛弧环境;红1井石炭纪火山岩的形成与北部的卡拉麦里-麦钦乌拉洋盆洋壳向南俯冲有关,在洋壳俯冲、消减、熔融作用下,喷发形成了哈尔力克岛弧,其南部的哈密坳陷应为弧后盆地。此类盆地易形成烃源岩及火山岩储层,对石炭系成藏极为有利。
There is a big uncertainty whether carboniferous development in Hami depression for a long time.According to the analysis of characteristics of volcanic rock geochemistry in Hami depression,H1 well＇s carboniferous volcano rocks,are belonging to sub alkaline series,enriched in potassium,losing of high field strength elements（ HFSEs,such as Nb,Ti and Ta）,having a typical ＂ TNT＂ negative abnormal,formed in the island-arc environment. So the formation of H1 well＇ s Carboniferous volcano rocks is Associated with the southward subduction of oceanic crust of Kalamaili-Maiqinwula Ocean lying in the northern Hami Depression. With the subduction of oceanic crustof Kalamaili-Maiqinwula,subtractive,melting and eruptions,Haerlike Island-arcwas formed. During Carboniferous,Hami Depression should been a back-arcbasin located in south of Haerlike Island-arc. Hydrocarbon source rocks and volcano rock reservoirs were prodcued easily in this kind of basin,whether was very favorable to hydrocarbon accumulation.
出处
《科学技术与工程》
北大核心
2016年第13期18-22,共5页
Science Technology and Engineering
关键词
哈密坳陷
石炭纪
弧后盆地
油气勘探
Hami depression
carboniferous
back-arc basin
oil and gas exploration
