Tectonic Emplacement of Serpentinite Southeast of San Jose, California
Tectonic Emplacement of Serpentinite Southeast of San Jose, California
复制标题
加利福尼亚州圣何塞东南部蛇纹岩的构造位置
DOI：
10.1080/00206819909465154
复制
发表时间：
1999
影响因子：
2.6
通讯作者：
R. Coleman
中科院分区：
文献类型：
--
作者：
B. M. Page;Leo A. De Vito;R. Coleman
圣克拉拉组在很近的时期受到了蛇纹底辟侵位的巨大影响。平坦冲断岩席中的蛇绿岩以前属于海岸山脉蛇绿岩的下部单元，它覆盖了大峡谷层序的侏罗纪-白垩纪碎屑沉积。区域性广泛的海岸山脉断层使上述所有岩石就位，包括中生代方济各会杂岩上方的平坦的蛇纹石逆冲岩席。该复合体在该地区的许多地方都出露，可能是整个地区的基底。方济各会杂岩中的蛇绿岩体来自于与海岸山脉蛇绿岩无关的橄榄岩楔。海岸山脉蛇绿岩蛇纹石的暴露可能是由隆起和深侵蚀结合叠瓦状逆冲推覆作用和向西变薄的大峡谷沉积物，广泛暴露的基础海岸山脉蛇绿岩蛇纹石。上新世更新世，非海洋圣克拉拉组沉积在海岸山脉。
The Santa Clara Formation was drastically affected by emplacement of serpentine diapirs in very recent times. Serpentine in flat thrust sheets formerly belonged to the lower unit of the Coast Range Ophiolite, which underlay the Jurassic—Cretaceous clastic sediments of the Great Valley Sequence. The regionally extensive Coast Range fault had emplaced all the aforementioned rocks, including the flat thrust sheets of serpentine, over the Mesozoic Franciscan Complex. This complex is exposed in many places in the area and presumably is basement for the entire region. Serpentine bodies within the Franciscan Complex were derived from peridotite wedges unrelated to the Coast Range Ophiolite. Exposure of the Coast Range Ophiolite serpentine may have been assisted by uplift and deep erosion combined with imbricate thrusting and westward thinning of the Great Valley sediments, broadly exposing the basal Coast Range Ophiolite serpentine. Plio-Pleistocene, non-marine Santa Clara Formation was deposited on Coast Range ...