新疆和田地区志留系—中泥盆统塔里其组的建立

塔里其组系从新疆塔里木地层区铁克里克地层分区棋盘地层小区古元古界埃连卡特群中独立出来的一个新组 ,为一套灰绿色的浅变质岩系 ,厚度较大 ,横向分布稳定。与上覆地层上泥盆统奇自拉夫组或上石炭统卡拉乌依组、阿孜干组呈不整合或断层接触 ;底界未见出露 ,但根据其为和田推覆体最下部的一套地层 ,与下伏的准原地系统应为断层接触。该组中新发现有孢粉化石 ,并结合岩性特征、Rb- Sr等时线法测年等资料及野外观测 ,将其时代定为志留纪—中泥盆世

THE SILURIAN-MIDDLE DEVONIAN TALIQI FORMATION IN HETIAN, XINJIANG

The Taliqi Formation is a newly established formation, separated from the Paleoproterozoic Ailiankate Group in the Qinpan subdistrict of the Tiekelike stratigraphical district, Tarim stratigraphical region. The formation consists of grey green epimetamorphosed rocks, thick, and widely distributied in Hetian area. It is angularly unconformable or in fault contact with its overlying formation. Its lower boundary is not exposed, but it is the lower part of the Hetian nappe. Thus it may be concluded that it should be in fault contact with its underlying rocks. Based on the newly found the fossil spores and pollen, lithological characters, isotopic age of Rb Sr, and fieldwork, it is certain that the age of the Taliqi Formation is Silurian—Middle Devonian.