形容词词尾
发表于 2025-3-25 07:21:38
Gold Deposits,etal), and because exquisite objects can be crafted from this highly malleable and ductile metal. The earliest gold miners were the Sumerians, who were working deposits in the present-day Iran by 3800 B.C., and the Egyptians, who had organized gold mining on a significant scale by at least 3000 B.C.
果仁
发表于 2025-3-25 09:13:51
Book 2000 exploitation. In fact, the earliest human interest in rocks was probably because of the easily accessible, useful (e. g. , red pigment in the form of earthy hematite) or valuable (e. g. , native gold and gemstones) materials they contained at places. In modem times, the study of mineral deposits ha
侵略者
发表于 2025-3-25 12:17:00
commercial exploitation. In fact, the earliest human interest in rocks was probably because of the easily accessible, useful (e. g. , red pigment in the form of earthy hematite) or valuable (e. g. , native gold and gemstones) materials they contained at places. In modem times, the study of mineral d
安定
发表于 2025-3-25 19:26:32
Formation of Mineral Deposits, result in further dispersal of trace elements, have been able to produce mineable deposits of geochemically scarce elements, such as gold and mercury, involving concentration factors in the thousands.
cornucopia
发表于 2025-3-25 23:17:55
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审问
发表于 2025-3-26 00:24:58
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LIMIT
发表于 2025-3-26 07:04:24
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反复无常
发表于 2025-3-26 09:23:57
Sediment-Hosted Stratiform Copper (SSC) Deposits,riptor ‘stratiform’ is not entirely accurate, because mineralized zones are not always conformable with bedding, but quite adequate if it is allowed to include slightly transgressive morphologies of such zones (Brown 1989). To describe such mineralization as strata-bound would be a greater distortio
Tartar
发表于 2025-3-26 16:37:06
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语言学
发表于 2025-3-26 19:21:34
Precambrian Iron-Formations, of Fe-rich rocks (see Ch. 2). In this chapter we restrict our attention to the so called iron-formations, which constitute by far the most abundant and economically the most important iron-rich sediments.