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1a：Magmatic - Intrusive (Intrusive Breccia) 熔岩性 - 侵入 (侵入角砾岩)：At contact of intrusive body, Igneous & (hornfelsed) wall rock clasts. Matrix of intrusive igneous material. Reaction rims around clast common.与侵入体接触,火成的和(角页岩化)边岩碎屑. 侵入火成物质基质. 碎屑边常见反应边缘。
1b：Magmatic - Hydrothermal (Carapace Breccia) 熔岩性 - 热液 (熔岩壳角砾岩)：Occur at the top of intrusive bodies. Igneous & (hornfelsed) wall rock clasts. Matrix of pegmatitic minerals (e.g. qt, to, mica), no open cavities.出现在侵入体顶部、火成的和(角页岩化)边岩碎屑. 伟晶的矿物基质(如石英,电气石,云母),没空洞。
1c: Magmatic - Tectonic (Intrusive Breccia) 熔岩性 - 构造 (侵入角砾岩)：Igneous & (hornfelsed) wall rock clasts. At contact of intrusive body. Shows deformation textures, angular, clast - supported, clastic matrix.火成的和(角页岩化)边岩碎屑. 与侵入体接触. 显示变形结构,尖角的,碎屑支撑的,碎屑基质。
2a: Endogenous Volcanic (Vein Breccia) 内生火山性 (脉角砾岩)：Subvert. Bodies, dominantly volcanic clasts, angular, clast-supported, clastic matrix. Little or no pre - brecciation hydrothermal alteration or veining.近垂直体,主要为火山碎屑,尖角的,碎屑支撑的,碎屑基质. 少许或缺角砾化前热液蚀变或矿脉.
2b：Endogenous Volcanic (Eruptive Volcanic Breccia: Flow Bxa, Tuff, Lapilli Tuff, Agglomerate, Igminbrite, etc.) 内生火山性 (喷发火山角砾岩:流状角砾岩,凝灰岩,火山砾凝灰岩,集块岩,熔结凝灰岩,等.)：Predominantly vesicular, glassy volcanic clasts, clastic or igneous matrix. Little or no pre - brecciation hydrothermal alteration or veining, clast or matrix supported, may contain ballitic clasts (bombs). Massive or sub horizontally bedded, can be extensive.主要为多孔的,玻璃火山碎屑,碎屑的或火成的基质. 少许或缺角砾化前热液蚀变或矿脉,碎屑或基质支撑的,可带火山弹.块状或近水平层状,可以是大面积的.
3a：Endogenous Phreatomagnetic (Diatreme Breccia) 内生岩浆蒸气的 (爆发角砾岩)：Polymict, with juvenile magmatic clasts/matrix, near - vertical pipe - like breccia bodies. Matrix supported, clastic matrix (may grade to an igneous matrix at depth). Some clasts may be altered and/or veined; rare wood, accretionary lapilli. 多源碎屑的,带初生岩浆碎屑/基质,近垂直岩管似的角砾体. 碎屑基质(可在深部渐变成火成基质). 有些碎屑可以蚀变及/或含矿脉;绝少含木,增生火山砾。
3b：Endogenous Phreatomagnetic (Tuff, Lapilli Tuff, etc.) 内生岩浆蒸气的 (凝灰岩,火山砾凝灰岩,等.)：Usually polymict, w/ lava and WR clasts, thin deposits, may be laterlly extensive. Matrix supported, fg with clastic matrix, clasts usually not altered or veined. 通常为多源碎屑,含熔岩和围岩碎屑,矿床薄,可以是横向大面积的. 基质支撑的,幼粒的带碎屑基质,碎屑通常没蚀变或带矿脉。
4a：Endogenous Magmatic - Phreatic (Hydrothermal Veint Breccia) 内生岩浆 - 地下水 (热液脉角砾岩)：Clastic matrix or chemically - deposited cement, pre - bxa'n, alt'n and veining. Common no juvenile magmatic material: may have altered/min'lzd clasts &/or matrix, usually polymict, matrix-supported, angular to subrounded.碎屑基质或化学沉积胶结,角砾化,蚀变和矿脉前. 常没有初生岩浆物质:可以有蚀变/矿化碎屑及/和基质,通常为多源碎屑,基质支撑的,棱角至浑圆的。
4b：Endogenous Magmatic - Phreatic (Hydrothermal Eruption Bxa) 内生岩浆 - 地下水 (热液喷发角砾岩)：Usually polymict, matrix - supported, clastic matrix. Thin (usually <20 m), flat - lying deposits. May contain plant fragments. Mostly hydrothermally altered clasts (low-T minerals).通常为多源碎屑,基质支撑的,碎屑基质. 薄(通常<20m),平卧矿床. 可合植物碎片. 大部份为热液蚀变碎屑(少-T 矿物)。
5a：Endogenous Phreatic (Hydrothermal Veint Breccia) 内生地下水 (热液脉角砾岩)：Hydrothermal cement (e.g. qt, cc, ad, ze, py), vugs: pre-brecciation, mineralized clast and/or matrix, alt'n & vn common: usually polymict, angular to subrounded.热液胶结(如石英,辉铜矿,冰长石,沸石,黄铁矿),晶洞: 角砾化前,矿化碎屑和/或基质,蚀变和矿脉常见:通常为多源碎屑,棱角状至次浑圆状。
5b：Endogenous Phreatic (Hydrothermal Eruption Bxa) 内生地下水 (热液喷发角砾岩)：Usually polymict, matrix supported, clastic matrix. Mostly hydrothermal alt'd clasts (low - T min'rls), thin (usually <10 m), flat-lying depo's. May contain plant fragments. 通常为多源碎屑,基质支撑,碎屑基质. 大部份为热液蚀变碎屑(少 - T矿物),薄(通常<10m),平卧矿床. 可带植物碎片。
6：Tectonic (Fault Breccia, Mylonite) 地壳构造的 (断层角砾岩, 糜棱岩)：Associated with identifiable fault structures, clast aligned, imbricated with slickensides, shows deformation textures, clastic matrix.与可识别的断层构造相关,碎屑排列,成鳞迭状/成瓦迭状并带擦光面,显示变型结构,碎屑基质.
7：Sedimentary 沉积的：Subhorizontal bedding sedimentary structures, generally matrix - supported, clastic matrix. May (but not all) are polymict, with rounded clasts.近水平层状沉积构造,一般为基质支撑的,碎屑基质. 可以(但非所有)是多源碎屑,带浑圆的碎屑. |
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发表于 2010-3-18 17:16
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