Petrology of tremolite rocks in the high-pressure metamorphic terranes

高压变质地体透闪石岩石学

• 批准号: 14540452
• 负责人: MAEKAWA Hirokazu
• 金额: $ 2.05万
• 依托单位: Osaka Prefecture University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14540452/
• 关键词: serpentinite; perigdotite; high-pressure belt; tremolite; metasomatism; Mariana; serpentinite zeamount; 蛇紋岩海山; 高圧変成帯

The Franciscan Complex, California, and the Kamuikotan metamorphic belt, Japan, are accompanied by serpentinite melange with deeper high-grade metamorphic rocks, whereas the Sanbagawa metamorphic belt, Japan, contains less amounts of serpentinite and is not accompanied by any serpentinite melange. The former were probably formed under a tensional stress regime, and the latter under a compressional one. The restricted occurrence of serpentinite to the high-grade pelitic schist in the Sanbagawa belt suggests that the serpentinites had been supplied from wedge mantle into pelagic sediments on the top of subducting plate at the initiation of accretion. Tremolite rocks and phengite-chlorite schists near serpentinite in the Sanbagawa belt and from Chamorro Seamount, Mariana forearc, may suggest the widespread metasomatism along the boundary between wedge mantle serpentinite and pelagic sediments. Further research on the mechanical and physico-chemical behaviors of these metasomatic rocks are important to understand the phenomena along the subduction boundary between oceanic and land-ward plates.

加利福尼亚州方济各会综合体和日本的kamuikotan变质带伴随着蛇形杂种，带有更深的高级变质岩石，而日本的桑川川变质腰带则含有较少的蛇形岩石，含有较少的蛇形岩石，并不伴随着任何serpentinite melange。前者可能是在紧张应力状态下形成的，后者在压缩方面形成。 sanbagawa带的蛇纹岩对高度的脑片片的限制发生表明，蛇纹石是从楔形地幔中提供的蛇纹石岩，该沉积物是在促进板的顶部的上层沉积物中。 Sanbagawa带的Serpentinite附近的颤音岩石和岩石岩石岩以及玛丽安娜前牙的Chamorro Seamount附近，可能暗示沿着楔形地幔蛇纹石和Pelagic沉积物之间的边界的广泛偏移。对这些转移岩石的机械和物理化学行为的进一步研究对于了解海洋和陆上板之间俯冲边界的现象很重要。

项目成果

前川寛和: "プレート沈み込み帯における蛇紋岩化作用"月刊地球号外. No.43. 67-74 (2003)

Hirokazu Maekawa：“板块俯冲带中的蛇纹石化”，地球月刊特刊，第 43 期（2003 年）。

Maekawa, H.: "Serpentinization in the subduction zone"Chikyu Monthly. 43. 67-74 (2003)

Maekawa, H.：“俯冲带的蛇纹石化”地球月刊。

笠原順三他20名: "『地震発生と水』 担当箇所 3.3 蛇紋岩ダイアピル p.140-151"東京大学出版会. 392 (2003)

Junzo Kasahara 等 20 人：“‘地震发生和水’第 3.3 部分蛇纹岩底辟 p.140-151”东京大学出版社 392 (2003)。

笠原順三他20名: "地震発生と水 担当箇所3.3蛇紋岩ダイアピルp.140-151."東京大学出版会. 392 (2003)

Junzo Kasahara 等 20 人：“地震发生与水：第 3.3 节蛇纹石底辟，第 140-151 页。”东京大学出版社 392。

Maekawa, H., Yamamoto, K., Ueno, T., Osada, Y., Nogami, N.: "Significance of serpentinites and related rocks in the high-pressure metamorphic terranes, circum-Pacific regions"International Geology Review. (in press).

Maekawa, H.、Yamamoto, K.、Ueno, T.、Osada, Y.、Nogami, N.：“环太平洋地区高压变质岩中蛇纹岩及相关岩石的意义”国际地质评论。