藏西北三岔口地区泥盆系生物礁特征及其意义  

The Devonian bioherms in Sanchakou,northwestern Xizang and their implications

作　　者：夏军[1] 钟华明[1] 童劲松[1] 鲁如魁[1] 

机构地区：[1]安徽省地质调查院,安徽合肥230001

出　　处：《沉积与特提斯地质》2006年第2期34-41,共8页Sedimentary Geology and Tethyan Geology

基　　金：中国地质调查局"西藏1:25万松西幅;温泉幅区域地质调查"(200213000007)

摘　　要：在羌塘西部的三岔口一带泥盆系拉竹龙组中发现规模较大的生物礁———台地前缘礁。下层礁体厚7.28m,上层礁体厚40.98m。两个礁体均为叠置礁,礁体由礁基、礁核、礁顶组成。剖面显示发育有礁前垮塌角砾、礁格架、礁间及礁后环境。泥盆纪生物礁的发现为羌塘盆地寻找油气资源提供了新思路。Two layers of the larger-sized bioherms are identified in the Devonian Lazhuglung Formation in Sanchakou, northwestem Xizang. The bioherms occur as superimposed reefs have a thickness of 7.28 m for the lower bioherms, and 40.98 m for the upper ones, and consist of reef batholith, reef core and reef crest. The reef front talus, reef frame, interreef and backreef deposits are observed in the profile. The discovery of the Devonian bioherms may offer some new thoughts on possible future direction of the oil and gas exploration in the study area.

关 键 词：生物礁 拉竹龙组 泥盆系 羌塘盆地 西藏 

分 类 号：P534.44[天文地球—古生物学与地层学]