Long-lived Paleotethyan pelagic remnant inside Shan-Thai Block:Evidence from radiolarian biostratigraphy  

作　　者：Chongpan Chonglakmani Dietrich Helmcke Rucha Ingavat-Helmcke 

机构地区：[1]School of Geotechnology,Suranaree University of Technology,Nakhon Ratchasima,Thailand,Center of Geosciences,University of Gottingen,Goldschmidtstr.3,D-37077 Gottingen,Germany ,Center of Geosciences,University of Gottingen,Goldschmidtstr.3,D-37077 Gottingen,Germany

出　　处：《Science China Earth Sciences》2004年第12期1113-1119,共7页中国科学（地球科学英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.4000541529 and 40372105);DAAD of Germany,and Suranaree University of Technology,Thailand.

摘　　要：Newly identified radiolarians from ribbon chert in the Mae Hong Son-Mae Sariang area, northwestern Thailand covered Early Carboniferous, Late Permian, and Middle-Late Triassic in age, which indicate that there was a pelagic basin during the Late Paleozoic and Triassic in this region together with the published radiolarian biostratigraphic data. This basin is joined with the Chiang Dao and Changning-Menglian oceanic basins, which represent the main oceanic basin of Paleotethyan Archipelago Ocean. The main oceanic basin was situated in the traditional “Shan-Thai Block”. Therefore, “the Shan-Thai Block” was not a single block during that stage, but composed of the Paleotethyan Ocean and two continental terranes that affiliated to Gondwana and Cathysian domains respectively. Keywords Late Paleozoic and Triassic - Radiolarian - northwest Thailand - Shan-Thai Block - PaleotethysNewly identified radiolarians from ribbon chert in the Mae Hong Son-Mae Sariang area, northwestern Thailand covered Early Carboniferous, Late Permian, and Middle-Late Triassic in age, which indicate that there was a pelagic basin during the Late Paleozoic and Triassic in this region to- gether with the published radiolarian biostratigraphic data. This basin is joined with the Chiang Dao and Changning-Menglian oceanic basins, which represent the main oceanic basin of Paleotethyan Archi- pelago Ocean. The main oceanic basin was situated in the traditional "Shan-Thai Block". Therefore, "the Shan-Thai Block" was not a single block during that stage, but composed of the Paleotethyan Ocean and two continental terranes that affiliated to Gondwana and Cathysian domains respectively.

关 键 词：Late PALEOZOIC and Triassic  radiolarian  northwest Thailand  Shan-Thai Block  Paleotethys. 

分 类 号：Q911.6[天文地球—古生物学与地层学]