Abstract

The first paleomagnetic and petrochemical data on the Lower Cretaceous sedimentary rocks of the Komsomolsk Series from the Zhuravlevka–Amurian turbidite paleobasin are presented. The rocks are collected in coastal outcrops of Sakhalin Bay (54.09° N, 140.05° E). The studies reveal that (1) the petrochemical characteristics of the sedimentary rocks of the Gorinskaya and Pionerskaya formations (Berriasian–Valanginian) do not contradict the model of their formation in a setting of the transform continental margin; (2) the paleolatitude at which they attained pre-folding paleomagnetic direction (Dec = 303°, Inc = 27°, Ks/Kg = 6.2) was 10–18° N; (3) in the post-Valanginian time, before 95 Ma B.P., the block including these rocks moved northward by 3900–4800 km along the Eurasian transform continental margin at a mean rate of about 10–13 cm/yr.

中文翻译：

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朱拉夫列夫卡–阿穆里人地带（北锡科特阿林）Gorinskaya和Pionerskaya地层的砂岩的古磁性和岩石化学

摘要

给出了朱拉夫列夫卡-阿穆里人浊石古生物中的科姆索莫尔斯克系列下白垩统沉积岩的第一个古磁性和石油化学数据。岩石收集在萨哈林湾（54.09°N，140.05°E）的沿海露头中。研究表明：（1）在转换大陆边缘的背景下，Gorinskaya和Pionerskaya地层（贝里亚斯－瓦朗吉尼亚）的沉积岩石的岩石化学特征与它们的形成模型没有矛盾；（2）他们达到折叠前的古磁性方向的古纬度（Dec = 303°，Inc = 27°，Ks / Kg = 6.2）为N = 10–18°；（3）在后瓦朗吉时期，在95 Ma BP之前，包括这些岩石的块体沿欧亚变换大陆边缘向北移动了3900-4800 km，平均速率约为10-13 cm / yr。