摘要
我国陆上最深的钻井塔参 1井位于塔里木盆地中央隆起 ,井深 72 0 0m ,在井深 3742～ 40 0 1m钻遇志留 泥盆系碎屑岩 2 5 9m ,包括下志留统 1 2 5m ,上泥盆统 1 34m。在该段岩心采样 2 3块 (下志留统 1 5块 ,上泥盆统 8块 ) ,其全岩和微量元素地球化学分析表明 ,塔参 1井的志留 泥盆系碎屑岩均为稳定大陆克拉通内部的沉积 ,物源可能来自其底部以前震旦纪花岗岩为代表的古老陆壳基底。
The Drilling Well of Tacan 1 (TC 1 for short) was an exploration well in the central part of the Tarim Basin, NW China. It was 7 200 m in depth and the deepest well on shore in China, so far. Its systematic core extracted was an important window for the studies on Tarim geology. The Silurian Devonian clastic rocks were revealed from the depth of 3 742 m to 4 001 m, including 125 m of Lower Silurian and 134 m of Upper Devonian. Total 23 specimens (15 of Lower Silurian and 8 of Upper Devonian) were collected for chemical analysis. The geochemical data showed that the sedimento tectonic setting was an inner cratonic environment. Namely, the Silurian and Devonian clastic rocks in the TC 1 area were deposited on a stable continental crust. The provenance might be the uplifted Pre Sinian basement rocks, which were represented by the granitoids revealed at the bottom of the TC 1.
出处
《地质科学》
CAS
CSCD
北大核心
2003年第4期519-528,共10页
Chinese Journal of Geology(Scientia Geologica Sinica)
基金
国家自然科学基金 (批准号 :40 0 72 0 77)
塔里木油田分公司科技攻关项目 ( 4 1 3 0 1 0 5 0 3 3 6)共同资助
关键词
塔里木盆地
沉积构造背景
地球化学
志留-泥盆系
Sedimento tectonic setting, Geochemistry, The Silurian Devonian, The central part of Tarim Basin, Drilling Well of Tacan 1
