台灣車籠埔斷層鑽井整合型計畫─台灣車籠埔鑽井岩芯和流體的物理、化學性質和微生物 (I)
Other Title
Physical and Chemical Properties and Microbiologic Analysis of Core Materials
and Fluids in the TCDP
and Fluids in the TCDP
Date Issued
2005
Date
2005
Author(s)
DOI
932119M002028
Abstract
We have finished drilling the TCDP hole-A
which it has the cuttings from 0 to 431.34 m and cores
from 431.34 to 2003.26 m deep in the end of 2004.
Meanwhile, the Hole-B with a branch was cored
between 950 m to 1350 m in May, 2005. At least six
fault zones have been identified in the cores. Based on
the surface trail of rupture, regional geology, shallow
seismic reflection, well logging, thermal measurement
and core examinations, the slip zone of 1999 Chi-Chi
earthquake may be occurred in the black material of
fault zone FZ1111 around the depth of 1111.29 m. It
is composed of 12 cm thick ultracataclasites with
slickenline. The XRD and TEM analyses show that
the black materials consist of amorphous phase,
pseudotachylyte and rich in smectite which reach as
high as 85% of total clays. However, the smectite-rich
gouges can not find in other parts of the FZ1111 and
the other fault zones. The smectite-rich gouge may be
resulted from the devitrification of pseudotachylyte,
produced by frictional melting after the rapid slip of the seismic earthquake. Co-existences, thus, of
pseudotachylyte and smectite-rich in the black
materials of FZ1111 indicate that the mechanism of
large displacement seismic faulting occurred in 1999
Chi-Chi earthquake may be due to the lubrication of
thermal pressurization following the frictional
melting.
Subjects
斷層岩石
車籠埔斷層
台灣車龍埔斷層
深鑽計畫
深鑽計畫
地質微生物
氣體連續監測
Publisher
臺北市：國立臺灣大學地質科學系暨研究所
Type
report
File(s)![Thumbnail Image]()
Loading...
Name
932119M002028.pdf
Size
222.94 KB
Format
Adobe PDF
Checksum
(MD5):1357b3f7fbd0a816a88432ca66b9c0a6