Cenozoic biogenic mounds and buried Miocene(?) barrier reef on a predominantly cool-water carbonate continental margin—Eucla basin, western Great Australian Bight
Cenozoic biogenic mounds and buried Miocene(?) barrier reef on a predominantly cool-water carbonate continental margin—Eucla basin, western Great Australian Bight
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新生代生物丘和埋藏的中新世（？）堡礁位于主要是冷水碳酸盐大陆边缘——大澳大利亚湾西部的尤克拉盆地
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
N. James
中科院分区：
文献类型：
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作者：
D. Feary;N. James
澳大利亚南部大陆边缘是全球最大的冷水碳酸盐陆架沉积区。对大澳大利亚湾西部 5495 公里的气枪地震反射数据的解释表明，尤克拉盆地近海 700 米厚的新生代部分主要沉积为前进的冷水、中高纬度碳酸盐坡道，其特征是广泛发育广泛的、低地势的生物成因（苔藓虫[?]-海绵）、陆架和上坡土丘。该序列还包含与现代陆架边缘平行的壮观而广阔（> 475 公里长）的埋藏中中新世堡礁（中新世小堡礁）。这个有边缘的碳酸盐台地边缘代表了全球气候最适宜时期的一次温水沉积，可能还伴随着原始卢文洋流的强烈东流。中新世晚期的海平面升降在礁石悬崖脚下产生了面积有限的碎片裙带序列。碳酸盐岩台地的顶部是新近纪冷水碳酸盐坡道序列，其典型特征是加成到乙状序列，其间不时出现冷水、海底侵蚀时期。根据全球和局部构造和海洋事件对这种演替的解释说明了水温对整个新生代碳酸盐台地和珊瑚礁生长的主要影响。
The southern continental margin of Australia is the largest area of cool-water carbonate shelf deposition on the globe. Interpretation of 5495 km of airgun seismic-reflection data in the western part of the Great Australian Bight indicates that the 700-m-thick Cenozoic section of the offshore Eucla basin was deposited largely as a prograding cool-water, middle- to high-latitude carbonate ramp, characterized by widespread development of broad, low-relief, biogenic (bryozoan[?]-sponge), shelf and upper-slope mounds. The succession also contains a spectacular and extensive (>475 km long) buried middle Miocene barrier reef (the Miocene Little Barrier Reef) parallel to the modern shelf edge. This rimmed carbonate platform margin represents an episode of warm-water sedimentation during a global climatic optimum, probably coupled with strong eastward flow of a proto-Leeuwin Current. The late Miocene eustatic sea-level fall produced an areally restricted debris-apron sequence at the foot of the reef escarpment. The carbonate platform is capped by a Neogene cool-water carbonate ramp succession typified by aggradational to sigmoidal sequences, punctuated by periods of cold(?)-water, sea-floor erosion. Interpretation of this succession in the light of global and local tectonic and oceanographic events illustrates the dominant influence of water temperature on carbonate platform and reef growth throughout the Cenozoic.