Sedimentary Event Recorded in Pelagic Sediments in the Circum-Pacific Mesozoic Accretionary Complexes

环太平洋中生代增生杂岩中上层沉积物记录的沉积事件

• 批准号: 08640567
• 负责人: KOJIMA Satoru
• 金额: $ 1.41万
• 依托单位: Gifu University (1997)Nagoya University (1996)
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08640567/
• 关键词: Mesozoic; accretionary complexes; sedimentary event; chert; Radiolaria

1. We have made field surveys in the Inner zone of Southwest Japan (Mino, Tamba and Ultra-Tamba terranes) and in Northeast Japan (Kitakami terrane), and collected samples of event-related rocks already found and looked for the new event-related rocks. We could find event-related rocks in chert distributed in Gujo-Hachiman, and estimated it to be Permian in age on the basis of the accompanied rocks.2. We have characterized the clastic grains in event-related rocks. The methods we used include observation by microscope, chemical analysis by EPMA,and chemical mapping by XGT.We could find glauconite-like minerals in the event-related rocks in the Hisuikyo area and dolomite clasts in the Ozaki area. These findings constraint the origin of the event-related rocks.3. Mesozoic accretionary complexes similar to those in Southwest Japan widely occur in Far East Russia. We examined the event-related rocks in the Samarka terrane, Jurassic accretionary complex, in Sikhote-Alin. As the result the event-related rocks are very similar to those in the Jurassic accretionary complex in Southwest Japan in composition, age, occurrence and depositional processes.

1.我们在日本西南部的内带（美浓、丹波和超丹波）和日本东北部（北上）进行了实地调查，收集了已经发现的事件相关岩石的样品，并寻找新的事件相关岩石。在九条八幡分布的硅质岩中发现了与事件有关的岩石，根据伴生岩石的年代，推测其为二叠纪。我们已经描述了与事件有关的岩石中的碎屑颗粒。通过显微镜观察、电子探针化学分析和XGT化学填图等方法，在积水京地区的事件相关岩石和尾崎地区的白云岩碎屑中发现了类钙钛矿矿物。这些发现限制了事件相关岩石的起源。与日本西南部类似的中生代增生杂岩在俄罗斯远东地区广泛分布。我们研究了事件相关的岩石在萨马尔卡萨马尔，侏罗纪增生杂岩，在Sikhote-Alin。因此，事件相关岩石的成分，年龄，产状和沉积过程非常相似，在日本西南部的侏罗纪增生杂岩。

项目成果

Kojima, S: "Clastic rocks in Triassic bedded chert of the Mino terrane,central Japan and the Samarka terrane,Sikhote-Alin,Russia" Proc.30th Int.Ceol.Cong.(in press).

Kojima, S：“日本中部 Mino 地体和俄罗斯 Sikhote-Alin 撒马尔卡地体三叠纪层状燧石中的碎屑岩”Proc.30th Int.Ceol.Cong.（出版中）。

Kojima, S.: "Clastic rocks in Triassic bedded chert of the Mino terrane, central Japan and the Samarka terrane, Sikhote-Alin, Russia" Proc.30th Int.Geol.Cong.(in press).

Kojima, S.：“日本中部的 Mino 地体和俄罗斯 Sikhote-Alin 的 Samarka 地体的三叠纪层状燧石中的碎屑岩”Proc.30th Int.Geol.Cong.（出版中）。

Kojima,S.: "Clastic rocks in Triassic bedded chert of the Mino terrane,central Japan and the Samarka terrane,Sikhoe-Alin,Russia" Proc.30th Int.Geol.Cong.(in press).

Kojima,S.：“日本中部 Mino 地体和俄罗斯 Sikhoe-Alin 撒马卡地体三叠纪层状燧石中的碎屑岩”Proc.30th Int.Geol.Cong.（出版中）。

亀高正男: "極東ロシア,タウハテレーンから産出した中生代放散虫化石" 大阪微化石研究会誌,特別号,. 10. 143-154 (1997)

Masao Kametaka：“来自俄罗斯远东 Tauch 地体的中生代放射虫化石” 大阪微化石研究会杂志，特刊，10. 143-154 (1997)

張 慶龍: "放射虫化石及地体対比研究" 古生物学報. 36. 245-252 (1997)

张庆龙：“放射虫化石与地质特征的比较研究”古生物学通报36。245-252（1997）。