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首页> 外文期刊>GSA Bulletin >Upper Mesozoic subsea fan deposits in the southern Diablo Range, California: Record of the Sierra Nevada magmatic arc
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Upper Mesozoic subsea fan deposits in the southern Diablo Range, California: Record of the Sierra Nevada magmatic arc

机译:加利福尼亚南部暗黑破坏神山脉上的中生代海底扇沉积物:内华达山脉岩浆弧的记录

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摘要

Near Coalinga, California, about 8.5 km of feldspathic and lithic siliciclastic strata of the Great Valley sequence is exposed along the west side of the San Joaquin Valley. There are four distinctive lithofacies in the section. These include: (I) graded, thin-bedded mudstone and fine-grained sandstone; (II) graded, moderately thin-bedded sandstone; (III) graded and nongraded, thick-bedded, commonly scoured and amalgamated sandstone; and (IV) normally and inversely graded and nongraded, thick-bedded conglomerate. Lithofacies I and II consist of low- and intermediate-energy turbidite deposits, including distal fan, overbank, and, possibly, contourite deposits. Lithofacies III consists of high-energy turbidite, subaqueous debris-flow, and grain-flow deposits, most of which are restricted to fan channel systems. Lithofacies IV contains predominantly subaqueous debris-flow deposits confined in fan channels.
机译:在加利福尼亚州科林加附近,大山谷序列的长石和石质硅质碎屑岩层约有8.5 km暴露在圣华金河谷西侧。 该节中有四个 岩相。其中包括:(I)分级的 薄层泥岩和细粒砂岩; (II)分级为 中度薄层砂岩; (III)分级和非分级, 厚层,通常经过精练和混合的砂岩;和 (IV)正常和反向分级和非分级厚层 砾岩。岩相I和II由低能量和中等能量的 浊积岩沉积物组成,包括远洋扇形沉积物,高边坡沉积物,以及可能的 同形岩沉积物。岩相岩III由高能量的 浊石,水下的泥石流和颗粒流沉积物组成, 其中大多数仅限于扇形通道系统。 Lithofacies IV主要包含限制在扇形通道中的 水下泥石流沉积物。

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  • 来源
    《GSA Bulletin》 |1979年第11期|1025-1046|共22页
  • 作者

    CHARLES F. MANSFIELD;

  • 作者单位

    Department of Geology, Southern Illinois University, Carbondale, Illinois 62901;

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  • 原文格式 PDF
  • 正文语种 eng
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